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Our comprehensive portfolio includes products for Filtration, Rapid Tests, Water Analysis, Chromatography, and Bioanalysis. We are proud to carry more than 20,000 products designed and manufactured to fit your individual needs.
With more than 470 highly qualified and experienced employees MACHEREY-NAGEL provides the best and most convenient service to our customers. 10 % of our staff have advanced degrees in the fields of Chemistry, Biology, Physics and Engineering, working in our research department on solutions to make your daily laboratory work easier.
This high performance liquid chromatograph (HPLC) is the first-ever instrument designed specifically for quantitative determination of cannabinoid content. Ready for use after one day of installation and testing, it provides a choice of three different HPLC methods and a dedicated user interface for a simplified workflow.
Throughout history, cannabis has been used as a panacea, an herbal remedy for nearly all medical concerns from simple headaches to severe pain. Now that many states have legalized medical cannabis, it is important to have analytical methodologies to study the compounds that the patients will be ingesting or inhaling. Terpenes are a major class of compounds found in cannabis. They are volatile hydrocarbons responsible for the plant’s aroma. These compounds are found in other plants as well. Through various clinical trials they were found to be medically relevant. In terms of cannabis, these compounds reportedly assist the cannabinoids in their effects. The cannabinoids bind to the cannabinoid receptor in the brain, and thus have medical relevance. Cannabichromene, cannabidiol, cannabigerol, and cannabinol are the main four cannabinoids that are implicated in relieving symptoms of pain, nausea, and directly reducing seizures. Delta-9-tetrahydrocannabinol is responsible for the euphoria experienced when smoked or ingested.
With the increase in usage of cannabis due to its medical legalization in many states, it is important to have analytical methods for testing potency and variance of the cannabinoids and terpenes within the plant material. To do this, terpenes and cannabinoids were analyzed using a GC-FID. As the terpenes have higher volatility, several injection techniques were tested, including liquid injection, SPME, and headspace. The cannabinoid method was then applied to test the variance in subsequent doses of the same size, mimicking that of doses distributed to patients.
Using Solid Phase Microextraction for Cannabis TestingGERSTEL
In the quickly changing landscape of cannabis testing, laboratories are faced with the challenge of providing accurate results for a variety of different tests on challenging matrices. The wide variety of matrices encountered, including both plants, foods, and oily extracts, have complex chemical compositions which include pigments, fats, proteins and sugars. The sample preparation methods used must provide analyses free of these interferences for accurate and robust testing. In this seminar, we will present simple and effective sample preparation and analysis methods using solid phase microextraction (SPME) for determination of residual solvents and terpenes. SPME is a solvent-less extraction technique that is quantitative, sensitive, cost effective, and easy to automate. We will describe how to use SPME to cleanly, accurately and quantitatively determine residual solvents from hemp extract and terpenes from cannabis plant material. For both applications, descriptions of the method procedure along with data showing accuracy and reproducibility will be presented.
UHPLC has proven to be an effective way to reduce analysis times without losing separation efficiency through the use of small particle and core-shell column technologies. The use of higher column temperatures and shorter column lengths has allowed the analysis speed of UHPLC to be further increased. A number of high-speed UHPLC applications and conditions will be presented which now allow up to four analytical runs to be completed in only a one-minute timeframe.
Out of the Shadows: Identifying Impurities in Cannabis ProductsMarkus Roggen
Highly concentrated cannabis products have seen rapid growth, as customers become more accustomed to cannabis consumption and actively seek out high-potency products. Cannabis concentrates come in various forms and product names, from Badder, Budder and Crumble to Distillate, Oil and Shatter. Those products can have THC concentrations are high as 95%, compared with less than 25% common in cannabis flower.
While the actual THC concentration can vary between 70 and 95%, what is common for all cannabis concentrates is that the total of identified compounds seldomly goes above 95% of product weight.
Delic Labs is a research venture that seeks to add fundamental scientific insight to the field of cannabis and mushroom production. In this regard, we set out to identify those compounds in the missing mass balance for cannabis concentrates. This presentation will show our latest advances in characterizing and quantifying impurities in cannabis concentrates. For example, we found reduced cannabinoid species in CBN products, THC isomers in distillates and oxidation products in CBD formulations.
Cannabis Analysis Identification and Quantification of THC and CBD by GC/FID ...PerkinElmer, Inc.
Analysis of cannabis has taken on new importance in light of legalized marijuana in several states of the USA. Cannabis contains several different components classed as cannabinoids. Primary cannabinoids of interest are tetrahydrocannabinol (THC), cannabidiol (CBD) and cannabinol (CBN). Positive identification and quantification of the THC/CBD ratio is a primary objective in the analysis of cannabis. Cannabis is analyzed for several different purposes. This application note will concentrate on the potency identification and quantification of THC and CBD in cannabis by Gas Chromatography.
Stability indicating rp hplc method for the determination of candisartansrirampharma
This document describes the development of an RP-HPLC method for the determination of candesartan in pure and pharmaceutical formulations. The method utilizes a C18 column with a mobile phase of phosphate buffer and acetonitrile in a 30:70 ratio at a flow rate of 1.2 mL/min. Candesartan was detected at 255 nm with a retention time of 3.089 minutes. The method was validated per ICH guidelines and demonstrated specificity, linearity from 20-60 μg/mL, precision, accuracy, ruggedness and robustness. The method was found to separate candesartan from degradation products formed under various stress conditions, indicating it is stability-indicating and can be used to conduct
Differential spectrophotometric method for estimation and validation of Verap...roshan telrandhe
The aimed of current research to development of the simple, rapid and sensitive Differential spectrophotometric method for the estimation of Verapamil in tablet dosage form. In this method two medium was use acid and alkaline and the difference spectrum was calculated. 0.1N HCL and 0.1N NaOH was used in this differential method. The λmax 278, beeers law limits 525µg/ml, regression equation Y= 0.024x-0.009, slope 0.024, intercept 0.09, correlation coefficient (r2) 0.998, %RSD <1.5, % Recovery (Tablet) 100.46% was shows the good efficacy and results. This method future scope in quality control of the verapamine in simple, precise and economically and it recommended for the routine drug quality analysis investigation.
This high performance liquid chromatograph (HPLC) is the first-ever instrument designed specifically for quantitative determination of cannabinoid content. Ready for use after one day of installation and testing, it provides a choice of three different HPLC methods and a dedicated user interface for a simplified workflow.
Throughout history, cannabis has been used as a panacea, an herbal remedy for nearly all medical concerns from simple headaches to severe pain. Now that many states have legalized medical cannabis, it is important to have analytical methodologies to study the compounds that the patients will be ingesting or inhaling. Terpenes are a major class of compounds found in cannabis. They are volatile hydrocarbons responsible for the plant’s aroma. These compounds are found in other plants as well. Through various clinical trials they were found to be medically relevant. In terms of cannabis, these compounds reportedly assist the cannabinoids in their effects. The cannabinoids bind to the cannabinoid receptor in the brain, and thus have medical relevance. Cannabichromene, cannabidiol, cannabigerol, and cannabinol are the main four cannabinoids that are implicated in relieving symptoms of pain, nausea, and directly reducing seizures. Delta-9-tetrahydrocannabinol is responsible for the euphoria experienced when smoked or ingested.
With the increase in usage of cannabis due to its medical legalization in many states, it is important to have analytical methods for testing potency and variance of the cannabinoids and terpenes within the plant material. To do this, terpenes and cannabinoids were analyzed using a GC-FID. As the terpenes have higher volatility, several injection techniques were tested, including liquid injection, SPME, and headspace. The cannabinoid method was then applied to test the variance in subsequent doses of the same size, mimicking that of doses distributed to patients.
Using Solid Phase Microextraction for Cannabis TestingGERSTEL
In the quickly changing landscape of cannabis testing, laboratories are faced with the challenge of providing accurate results for a variety of different tests on challenging matrices. The wide variety of matrices encountered, including both plants, foods, and oily extracts, have complex chemical compositions which include pigments, fats, proteins and sugars. The sample preparation methods used must provide analyses free of these interferences for accurate and robust testing. In this seminar, we will present simple and effective sample preparation and analysis methods using solid phase microextraction (SPME) for determination of residual solvents and terpenes. SPME is a solvent-less extraction technique that is quantitative, sensitive, cost effective, and easy to automate. We will describe how to use SPME to cleanly, accurately and quantitatively determine residual solvents from hemp extract and terpenes from cannabis plant material. For both applications, descriptions of the method procedure along with data showing accuracy and reproducibility will be presented.
UHPLC has proven to be an effective way to reduce analysis times without losing separation efficiency through the use of small particle and core-shell column technologies. The use of higher column temperatures and shorter column lengths has allowed the analysis speed of UHPLC to be further increased. A number of high-speed UHPLC applications and conditions will be presented which now allow up to four analytical runs to be completed in only a one-minute timeframe.
Out of the Shadows: Identifying Impurities in Cannabis ProductsMarkus Roggen
Highly concentrated cannabis products have seen rapid growth, as customers become more accustomed to cannabis consumption and actively seek out high-potency products. Cannabis concentrates come in various forms and product names, from Badder, Budder and Crumble to Distillate, Oil and Shatter. Those products can have THC concentrations are high as 95%, compared with less than 25% common in cannabis flower.
While the actual THC concentration can vary between 70 and 95%, what is common for all cannabis concentrates is that the total of identified compounds seldomly goes above 95% of product weight.
Delic Labs is a research venture that seeks to add fundamental scientific insight to the field of cannabis and mushroom production. In this regard, we set out to identify those compounds in the missing mass balance for cannabis concentrates. This presentation will show our latest advances in characterizing and quantifying impurities in cannabis concentrates. For example, we found reduced cannabinoid species in CBN products, THC isomers in distillates and oxidation products in CBD formulations.
Cannabis Analysis Identification and Quantification of THC and CBD by GC/FID ...PerkinElmer, Inc.
Analysis of cannabis has taken on new importance in light of legalized marijuana in several states of the USA. Cannabis contains several different components classed as cannabinoids. Primary cannabinoids of interest are tetrahydrocannabinol (THC), cannabidiol (CBD) and cannabinol (CBN). Positive identification and quantification of the THC/CBD ratio is a primary objective in the analysis of cannabis. Cannabis is analyzed for several different purposes. This application note will concentrate on the potency identification and quantification of THC and CBD in cannabis by Gas Chromatography.
Stability indicating rp hplc method for the determination of candisartansrirampharma
This document describes the development of an RP-HPLC method for the determination of candesartan in pure and pharmaceutical formulations. The method utilizes a C18 column with a mobile phase of phosphate buffer and acetonitrile in a 30:70 ratio at a flow rate of 1.2 mL/min. Candesartan was detected at 255 nm with a retention time of 3.089 minutes. The method was validated per ICH guidelines and demonstrated specificity, linearity from 20-60 μg/mL, precision, accuracy, ruggedness and robustness. The method was found to separate candesartan from degradation products formed under various stress conditions, indicating it is stability-indicating and can be used to conduct
Differential spectrophotometric method for estimation and validation of Verap...roshan telrandhe
The aimed of current research to development of the simple, rapid and sensitive Differential spectrophotometric method for the estimation of Verapamil in tablet dosage form. In this method two medium was use acid and alkaline and the difference spectrum was calculated. 0.1N HCL and 0.1N NaOH was used in this differential method. The λmax 278, beeers law limits 525µg/ml, regression equation Y= 0.024x-0.009, slope 0.024, intercept 0.09, correlation coefficient (r2) 0.998, %RSD <1.5, % Recovery (Tablet) 100.46% was shows the good efficacy and results. This method future scope in quality control of the verapamine in simple, precise and economically and it recommended for the routine drug quality analysis investigation.
Multiple Method Development and Validation for Simultaneous Estimation of Chl...ijtsrd
A simple, precise and accurate multiple analytical method has been developed for the simultaneous estimation of Chlorzoxazone and Nimesulide in bulk and tablet formulations by reversed-phase liquid chromatographic and UV-Visible spectrophotometric techniques. The chromatographic separation was achieved on C18 analytical column. A mixture of Methanol 0.1 Ortho-phosphoric acid 75 25 was used as mobile phase, at a flow rate of 1mL min and detection wavelength at 295 nm. The retention time of Chlorzoxazone and Nimesulide was found to be 4.69 and 5.45 min respectively. The linear dynamic ranges for HPLC were from 2-10 µg mL and for simultaneous equation method, derivative spectroscopy, Q-ratio Absorbance method, Dual wavelength it was 10-30 µg mL for both Chlorzoxazone and Nimesulide. The percentage recovery obtained for Chlorzoxazone and Nimesulide were 100.93 and 102.19 respectively for RP-HPLC, 9.7 and 100.1 for simultaneous equation method of CZ and NIM respectively, 99.97 and 99.78 for derivative spectroscopy of CZ and NIM respectively, 101.37 and 99.48 for Q-ratio Absorbance method of CZ and NIM respectively, 100.13 and 99.96 for dual wavelength method of CZ and NIM respectively. The validation of the proposed methods were carried out for linearity, accuracy, precision, limit of detection, limit of quantitation and robustness. The developed method can be used for routine quality control analysis of titled drugs in combination in tablet formulation. Swetha Yarramsetti | A. Elphine Prabahar | Rama Rao Nadendla "Multiple Method Development and Validation for Simultaneous Estimation of Chlorzoxazone and Nimesulide in Bulk and Pharmaceutical Dosage Form" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21503.pdf
Paper URL: https://www.ijtsrd.com/pharmacy/analytical-chemistry/21503/multiple-method-development-and-validation-for--simultaneous-estimation-of-chlorzoxazone-and--nimesulide-in-bulk-and-pharmaceutical-dosage-form/swetha-yarramsetti
John Edwards MNova User Meeting - SMASH - 9-22-13John Edwards
This document discusses the use of NMR spectroscopy by Process NMR Associates for quantitative analysis and chemometric modeling. It describes using NMR to develop automated quantitative analysis methods for complex mixtures like aloe vera juice. Large NMR datasets are preprocessed for chemometric regression to derive chemical and physical properties. Examples shown include quantitative 1H NMR analysis of constituents in aloe vera juice and using NMR data and PLS modeling to monitor an omega-3 supplement manufacturing process.
The document presents a method development and validation for the quantitative estimation of ondansetron hydrochloride using high performance thin layer chromatography (HPTLC). An HPTLC method was developed using a methanol and triethylamine-glacial acetic acid mobile phase to separate ondansetron hydrochloride. The method was validated in terms of linearity, accuracy, precision, specificity, limit of detection, limit of quantitation, ruggedness and robustness. The developed and validated HPTLC method was successfully applied for the estimation of ondansetron hydrochloride in bulk drug samples and tablet dosage forms.
The presentation describes the automated process of the system and present a number of applications from sample matrices such as food, polymers, and pharmaceuticals to show the utility of the system.
The growth of, and the confidence in, hemp products will require applicable testing to ensure product quality and safety. Chromatography technology will play a large role in this as the technique is used for potency testing. This study optimizes a quantitative chromatographic determination of 15 cannabinoids using the Shimadzu Hemp Analyzer.
This document discusses the use of in situ FTIR spectroscopy for monitoring organic synthesis reactions in real time. It describes how ReactIR, a flow cell accessory, allows for non-destructive analysis of reactions under normal operating conditions. This enables continuous monitoring of reaction kinetics, pathways and intermediates. The document presents examples of using the real-time spectral data from ReactIR to control reaction parameters and optimize multi-step continuous flow processes. Specifically, it shows how reactant addition can be automatically controlled based on measured intermediate concentrations to improve efficiency and reduce waste. Overall, the document illustrates how in situ FTIR spectroscopy is enhancing the development, analysis and control of continuous chemical synthesis.
Application Note: UHPLC Separation and Detection of Bisphenol A (BPA) in Plas...PerkinElmer, Inc.
The BPA or bisphenol A has become well known over the past year as concerns for its effect on human health and well being have been raised. The concerns over BPA began with baby bottles and spread to include other types of bottles. This paper will present the extraction and HPLC analysis of children's products for BPA.
This document describes using vibrational circular dichroism (VCD) spectroscopy to determine the chiral purity of an investigational drug intermediate (INT1a) that contains three chiral centers but lacks an ultraviolet chromophore. VCD was able to detect low levels of the undesired enantiomer of INT1a down to 0.1% when mixed with the desired enantiomer. A partial least squares model using VCD spectra achieved a cross-validation error of 0.46% for predicting the enantiomeric excess over a range of 97-99.9% purity. The study demonstrates that VCD can quantify chiral purity without the need for chromatographic separation.
The document describes an experimental study on the electrochemical and biosorption treatment of effluent containing nitrobenzene. In the electrochemical oxidation treatment, nitrobenzene effluent was treated batch-wise in an electrolytic cell with lead anode and copper cathode electrodes. Response surface methodology was used to optimize the conditions. The maximum 76.4% COD reduction occurred at a current density of 3.56 A dm-2, time of 3 hours, flow rate of 40 L hr-1, and volume of 9 L, with a minimum power consumption of 30.3 kWhr/kg COD. This was followed by biosorption treatment using maize and rice stems, achieving a maximum
Development and validation of a stability-indicating HPLC method for the simultaneous determination of Losartan potassium, hydrochlorothiazide, and their degradationproducts
This document summarizes research on two proteins - Human Retinol Binding Protein-4 (RBP4) and Kvβ2, a subunit of the Kv1 potassium channel. For RBP4, the researcher optimized PCR conditions to amplify the gene and assessed RBP4's proposed role in insulin resistance and diabetes. For Kvβ2, the researcher overexpressed and purified the protein, then tested the inhibitory effects of rutin, quercetin, and resveratrol on Kvβ2 activity. The results provide new insights into physiological processes involving the Shaker potassium channel and identify resveratrol as a potential inhibitor of Kvβ2 activity. Overall, the research yielded beneficial PCR guidelines
This document describes the development of an automated online SPE-LC/MS/MS method for pain management drug monitoring. Key aspects include:
1) A single method was developed to measure all relevant pain management drugs, including opioids and benzodiazepines, in a simplified workflow.
2) Method optimization focused on achieving high recovery for the lowest prescribed drug levels.
3) The method uses serial automated SPE on an LC autosampler to enable a total cycle time of 4.5 minutes for SPE and LC/MS/MS analysis.
4) Automated SPE method development was efficient, requiring only 3 lab days to optimize using a single SPE-LC/MS/MS system.
Improving Downstream Processing: Application of Excipients in DSPMilliporeSigma
Webinar summary:
This webinar will showcase the beneficial potential of using excipients during downstream processing of monoclonal antibodies.
Learning points:
In this webinar, you will see:
* An innovative excipient screening approach simulating low pH stress conditions during protein A chromatography and virus inactivation
* How the application of excipients in buffer systems can significantly improve protein stability and chromatographic performance
Abstract:
Key aspects during downstream purification of biopharmaceutical drugs are purity and process yield. Therefore, the downstream process needs to be designed in a way that the final product which will eventually end up in the patient entails low levels of product- and process related impurities (e.g. high molecular weight aggregates) as well as process related contaminants (e.g. host cell protein levels). In addition to this, the process must be capable of clearing and inactivating viruses to ensure product safety. In this webinar, we will explore the benefits of adding excipients during downstream processing on protein stability, chromatographic performance and viral inactivation.
Traditional Kashmiri Recipe “Shangri-Kahwa” as a Stimulant Drink and Effectiv...SriramNagarajan15
The popular recipe “Shangri-kahwa” is an age old home remedy for respiratory and various other problems in almost whole of Kashmir. It is prepared from important spices like liquorice, clove, cinnamon, and cardamom, which have documented health benefits. Information about its use and method of preparation was obtained from group discussions held in some villages of Baramullah district of Jammu and Kashmir. People in these villages believe that Shangri-kahwa is cost effective, delicious, made from easily available ingredients and can be prepared easily at home. Being residents of this area, the authors are aware of the popularity of this magical drink used as a first line of treatment for various ailments at home, particularly during cold days. This recipe is extremely famous in these villages both as a refreshing and stimulant drink, as well as believed to be highly efficacious in respiratory illnesses. It is cost effective and highly palatable. The ingredients of Shangri-kahwa are being used extensively in Unani system of medicine and Ayurveda for almost same indications as the recipe is used. This study was carried out to highlight the effectiveness and focus the attention of the researchers towards this attractive and effective dosage form used as home remedy in Kashmir.
Spectrophotometric Estimation of Rosuvastatin Calcium in Bulk and Pharmaceuti...pharmaindexing
This document describes the development and validation of an RP-HPLC method for the simultaneous estimation of Lamivudine and Zidovudine in tablet dosage forms. The method utilizes a C18 column with a mobile phase of ammonium acetate buffer pH 4.0, acetonitrile and THF in a 60:30:10 ratio at a flow rate of 1 mL/min. Lamivudine and Zidovudine were well separated with retention times of 3.793 minutes and 2.547 minutes, respectively. The method was validated per ICH guidelines and demonstrated to be linear, precise, accurate, specific and robust for the simultaneous analysis of these two drugs in tablets.
The DNAPac PA-100 columns provide high resolution separation and purification of oligonucleotides including DNA, RNA, and phosphorothioates. They can resolve failure sequences from full-length products, separate oligonucleotides with secondary structures or self-complementary regions, and assay phosphorothioate purity by resolving sequences with different levels of thioation. The columns also offer convenient scale-up from analytical to preparative sizes and allow for analysis of clinical samples on fast cartridges.
UV spectrophotometric method development and validation for quantitative esti...Sagar Savale
UV Spectrophotometric Method Development and Validation for quantitative estimation of Ondansetron
Hydrochloride (HCL). U.V Spectrophotometric method have been widely employed in determination of
individual components in a mixture or fixed dose combination. Our aim is to develop spectroscopic method for
estimation of the Ondansetron HCL in ternary mixture by using U.V spectrophotometry. The method was
validated as per ICH guidelines. The recovery studies confirmed the accuracy and precision of the method. It was
successfully applied for the analysis of the drug in bulk and could be effectively used for the routine analysis.
1) 1H NMR spectroscopy can be used to quantify key components in aloe vera leaf juice such as acetylated polysaccharides, glucose, maltodextrin, and isocitrate. The method requires minimal sample preparation and provides reproducible, quantitative results.
2) Characteristic proton signals are used to identify and quantify each component based on chemical shifts, peak multiplicity, and number of protons. Calibration is performed using an internal standard.
3) The method is detailed in the American Herbal Pharmacopoeia monograph on aloe vera and can detect both natural components and potential adulterants in aloe vera products.
Multi-residue pesticide analysis of food samples using acetonitrile extractio...Kate?ina Svobodov
This document describes a method for multi-residue pesticide analysis of food samples using two-dimensional liquid chromatography coupled with tandem mass spectrometry (2D-LC-MS/MS). The method involves acetonitrile extraction of samples followed by separation using reverse phase and HILIC columns connected by a switching valve. The method showed improved peak shape and sensitivity for polar pesticides compared to single column methods. Recoveries of 79.67% of analytes were between 60-100% and reporting limits were 1 ppb or lower for most pesticides tested, demonstrating this 2D-LC-MS/MS method is effective for broad-scope pesticide residue testing in foods.
- HPTLC is a sophisticated form of thin layer chromatography that allows for the separation and quantification of compounds in herbal drug extracts.
- Key steps in HPTLC analysis include sample and standard preparation, separation on a thin layer using a mobile phase, detection of spots, and quantification through densitometry.
- HPTLC fingerprinting can be used to develop characteristic chromatographic profiles of herbal extracts and distinguish between closely related plant species. These fingerprints provide specifications for quality control of herbal drugs.
Multiple Method Development and Validation for Simultaneous Estimation of Chl...ijtsrd
A simple, precise and accurate multiple analytical method has been developed for the simultaneous estimation of Chlorzoxazone and Nimesulide in bulk and tablet formulations by reversed-phase liquid chromatographic and UV-Visible spectrophotometric techniques. The chromatographic separation was achieved on C18 analytical column. A mixture of Methanol 0.1 Ortho-phosphoric acid 75 25 was used as mobile phase, at a flow rate of 1mL min and detection wavelength at 295 nm. The retention time of Chlorzoxazone and Nimesulide was found to be 4.69 and 5.45 min respectively. The linear dynamic ranges for HPLC were from 2-10 µg mL and for simultaneous equation method, derivative spectroscopy, Q-ratio Absorbance method, Dual wavelength it was 10-30 µg mL for both Chlorzoxazone and Nimesulide. The percentage recovery obtained for Chlorzoxazone and Nimesulide were 100.93 and 102.19 respectively for RP-HPLC, 9.7 and 100.1 for simultaneous equation method of CZ and NIM respectively, 99.97 and 99.78 for derivative spectroscopy of CZ and NIM respectively, 101.37 and 99.48 for Q-ratio Absorbance method of CZ and NIM respectively, 100.13 and 99.96 for dual wavelength method of CZ and NIM respectively. The validation of the proposed methods were carried out for linearity, accuracy, precision, limit of detection, limit of quantitation and robustness. The developed method can be used for routine quality control analysis of titled drugs in combination in tablet formulation. Swetha Yarramsetti | A. Elphine Prabahar | Rama Rao Nadendla "Multiple Method Development and Validation for Simultaneous Estimation of Chlorzoxazone and Nimesulide in Bulk and Pharmaceutical Dosage Form" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21503.pdf
Paper URL: https://www.ijtsrd.com/pharmacy/analytical-chemistry/21503/multiple-method-development-and-validation-for--simultaneous-estimation-of-chlorzoxazone-and--nimesulide-in-bulk-and-pharmaceutical-dosage-form/swetha-yarramsetti
John Edwards MNova User Meeting - SMASH - 9-22-13John Edwards
This document discusses the use of NMR spectroscopy by Process NMR Associates for quantitative analysis and chemometric modeling. It describes using NMR to develop automated quantitative analysis methods for complex mixtures like aloe vera juice. Large NMR datasets are preprocessed for chemometric regression to derive chemical and physical properties. Examples shown include quantitative 1H NMR analysis of constituents in aloe vera juice and using NMR data and PLS modeling to monitor an omega-3 supplement manufacturing process.
The document presents a method development and validation for the quantitative estimation of ondansetron hydrochloride using high performance thin layer chromatography (HPTLC). An HPTLC method was developed using a methanol and triethylamine-glacial acetic acid mobile phase to separate ondansetron hydrochloride. The method was validated in terms of linearity, accuracy, precision, specificity, limit of detection, limit of quantitation, ruggedness and robustness. The developed and validated HPTLC method was successfully applied for the estimation of ondansetron hydrochloride in bulk drug samples and tablet dosage forms.
The presentation describes the automated process of the system and present a number of applications from sample matrices such as food, polymers, and pharmaceuticals to show the utility of the system.
The growth of, and the confidence in, hemp products will require applicable testing to ensure product quality and safety. Chromatography technology will play a large role in this as the technique is used for potency testing. This study optimizes a quantitative chromatographic determination of 15 cannabinoids using the Shimadzu Hemp Analyzer.
This document discusses the use of in situ FTIR spectroscopy for monitoring organic synthesis reactions in real time. It describes how ReactIR, a flow cell accessory, allows for non-destructive analysis of reactions under normal operating conditions. This enables continuous monitoring of reaction kinetics, pathways and intermediates. The document presents examples of using the real-time spectral data from ReactIR to control reaction parameters and optimize multi-step continuous flow processes. Specifically, it shows how reactant addition can be automatically controlled based on measured intermediate concentrations to improve efficiency and reduce waste. Overall, the document illustrates how in situ FTIR spectroscopy is enhancing the development, analysis and control of continuous chemical synthesis.
Application Note: UHPLC Separation and Detection of Bisphenol A (BPA) in Plas...PerkinElmer, Inc.
The BPA or bisphenol A has become well known over the past year as concerns for its effect on human health and well being have been raised. The concerns over BPA began with baby bottles and spread to include other types of bottles. This paper will present the extraction and HPLC analysis of children's products for BPA.
This document describes using vibrational circular dichroism (VCD) spectroscopy to determine the chiral purity of an investigational drug intermediate (INT1a) that contains three chiral centers but lacks an ultraviolet chromophore. VCD was able to detect low levels of the undesired enantiomer of INT1a down to 0.1% when mixed with the desired enantiomer. A partial least squares model using VCD spectra achieved a cross-validation error of 0.46% for predicting the enantiomeric excess over a range of 97-99.9% purity. The study demonstrates that VCD can quantify chiral purity without the need for chromatographic separation.
The document describes an experimental study on the electrochemical and biosorption treatment of effluent containing nitrobenzene. In the electrochemical oxidation treatment, nitrobenzene effluent was treated batch-wise in an electrolytic cell with lead anode and copper cathode electrodes. Response surface methodology was used to optimize the conditions. The maximum 76.4% COD reduction occurred at a current density of 3.56 A dm-2, time of 3 hours, flow rate of 40 L hr-1, and volume of 9 L, with a minimum power consumption of 30.3 kWhr/kg COD. This was followed by biosorption treatment using maize and rice stems, achieving a maximum
Development and validation of a stability-indicating HPLC method for the simultaneous determination of Losartan potassium, hydrochlorothiazide, and their degradationproducts
This document summarizes research on two proteins - Human Retinol Binding Protein-4 (RBP4) and Kvβ2, a subunit of the Kv1 potassium channel. For RBP4, the researcher optimized PCR conditions to amplify the gene and assessed RBP4's proposed role in insulin resistance and diabetes. For Kvβ2, the researcher overexpressed and purified the protein, then tested the inhibitory effects of rutin, quercetin, and resveratrol on Kvβ2 activity. The results provide new insights into physiological processes involving the Shaker potassium channel and identify resveratrol as a potential inhibitor of Kvβ2 activity. Overall, the research yielded beneficial PCR guidelines
This document describes the development of an automated online SPE-LC/MS/MS method for pain management drug monitoring. Key aspects include:
1) A single method was developed to measure all relevant pain management drugs, including opioids and benzodiazepines, in a simplified workflow.
2) Method optimization focused on achieving high recovery for the lowest prescribed drug levels.
3) The method uses serial automated SPE on an LC autosampler to enable a total cycle time of 4.5 minutes for SPE and LC/MS/MS analysis.
4) Automated SPE method development was efficient, requiring only 3 lab days to optimize using a single SPE-LC/MS/MS system.
Improving Downstream Processing: Application of Excipients in DSPMilliporeSigma
Webinar summary:
This webinar will showcase the beneficial potential of using excipients during downstream processing of monoclonal antibodies.
Learning points:
In this webinar, you will see:
* An innovative excipient screening approach simulating low pH stress conditions during protein A chromatography and virus inactivation
* How the application of excipients in buffer systems can significantly improve protein stability and chromatographic performance
Abstract:
Key aspects during downstream purification of biopharmaceutical drugs are purity and process yield. Therefore, the downstream process needs to be designed in a way that the final product which will eventually end up in the patient entails low levels of product- and process related impurities (e.g. high molecular weight aggregates) as well as process related contaminants (e.g. host cell protein levels). In addition to this, the process must be capable of clearing and inactivating viruses to ensure product safety. In this webinar, we will explore the benefits of adding excipients during downstream processing on protein stability, chromatographic performance and viral inactivation.
Traditional Kashmiri Recipe “Shangri-Kahwa” as a Stimulant Drink and Effectiv...SriramNagarajan15
The popular recipe “Shangri-kahwa” is an age old home remedy for respiratory and various other problems in almost whole of Kashmir. It is prepared from important spices like liquorice, clove, cinnamon, and cardamom, which have documented health benefits. Information about its use and method of preparation was obtained from group discussions held in some villages of Baramullah district of Jammu and Kashmir. People in these villages believe that Shangri-kahwa is cost effective, delicious, made from easily available ingredients and can be prepared easily at home. Being residents of this area, the authors are aware of the popularity of this magical drink used as a first line of treatment for various ailments at home, particularly during cold days. This recipe is extremely famous in these villages both as a refreshing and stimulant drink, as well as believed to be highly efficacious in respiratory illnesses. It is cost effective and highly palatable. The ingredients of Shangri-kahwa are being used extensively in Unani system of medicine and Ayurveda for almost same indications as the recipe is used. This study was carried out to highlight the effectiveness and focus the attention of the researchers towards this attractive and effective dosage form used as home remedy in Kashmir.
Spectrophotometric Estimation of Rosuvastatin Calcium in Bulk and Pharmaceuti...pharmaindexing
This document describes the development and validation of an RP-HPLC method for the simultaneous estimation of Lamivudine and Zidovudine in tablet dosage forms. The method utilizes a C18 column with a mobile phase of ammonium acetate buffer pH 4.0, acetonitrile and THF in a 60:30:10 ratio at a flow rate of 1 mL/min. Lamivudine and Zidovudine were well separated with retention times of 3.793 minutes and 2.547 minutes, respectively. The method was validated per ICH guidelines and demonstrated to be linear, precise, accurate, specific and robust for the simultaneous analysis of these two drugs in tablets.
The DNAPac PA-100 columns provide high resolution separation and purification of oligonucleotides including DNA, RNA, and phosphorothioates. They can resolve failure sequences from full-length products, separate oligonucleotides with secondary structures or self-complementary regions, and assay phosphorothioate purity by resolving sequences with different levels of thioation. The columns also offer convenient scale-up from analytical to preparative sizes and allow for analysis of clinical samples on fast cartridges.
UV spectrophotometric method development and validation for quantitative esti...Sagar Savale
UV Spectrophotometric Method Development and Validation for quantitative estimation of Ondansetron
Hydrochloride (HCL). U.V Spectrophotometric method have been widely employed in determination of
individual components in a mixture or fixed dose combination. Our aim is to develop spectroscopic method for
estimation of the Ondansetron HCL in ternary mixture by using U.V spectrophotometry. The method was
validated as per ICH guidelines. The recovery studies confirmed the accuracy and precision of the method. It was
successfully applied for the analysis of the drug in bulk and could be effectively used for the routine analysis.
1) 1H NMR spectroscopy can be used to quantify key components in aloe vera leaf juice such as acetylated polysaccharides, glucose, maltodextrin, and isocitrate. The method requires minimal sample preparation and provides reproducible, quantitative results.
2) Characteristic proton signals are used to identify and quantify each component based on chemical shifts, peak multiplicity, and number of protons. Calibration is performed using an internal standard.
3) The method is detailed in the American Herbal Pharmacopoeia monograph on aloe vera and can detect both natural components and potential adulterants in aloe vera products.
Multi-residue pesticide analysis of food samples using acetonitrile extractio...Kate?ina Svobodov
This document describes a method for multi-residue pesticide analysis of food samples using two-dimensional liquid chromatography coupled with tandem mass spectrometry (2D-LC-MS/MS). The method involves acetonitrile extraction of samples followed by separation using reverse phase and HILIC columns connected by a switching valve. The method showed improved peak shape and sensitivity for polar pesticides compared to single column methods. Recoveries of 79.67% of analytes were between 60-100% and reporting limits were 1 ppb or lower for most pesticides tested, demonstrating this 2D-LC-MS/MS method is effective for broad-scope pesticide residue testing in foods.
- HPTLC is a sophisticated form of thin layer chromatography that allows for the separation and quantification of compounds in herbal drug extracts.
- Key steps in HPTLC analysis include sample and standard preparation, separation on a thin layer using a mobile phase, detection of spots, and quantification through densitometry.
- HPTLC fingerprinting can be used to develop characteristic chromatographic profiles of herbal extracts and distinguish between closely related plant species. These fingerprints provide specifications for quality control of herbal drugs.
The document discusses various methods for diagnosing tuberculosis, including microscopy, culture, and rapid diagnostic tests. It provides details on acid-fast staining techniques like Ziehl-Neelsen and fluorescent staining. It describes culture methods using solid and liquid media to isolate Mycobacterium tuberculosis. It also summarizes several rapid culture techniques like BACTEC and MGIT, which can detect TB in 2 weeks compared to 4-6 weeks for conventional methods. Newer rapid tests like CBNAAT can simultaneously detect TB and rifampicin resistance within 2 hours. Overall, the document provides an overview of microbiological methods for TB diagnosis.
Rapid UHPLC Determination of Common Preservatives in Cosmetic Products v2zq
This document presents a fast UHPLC method for quantifying six common parabens (preservatives) in cosmetic products. The UHPLC method using a 1.9 μm column achieved a run time of 3.5 minutes, an over 80% reduction compared to the 19 minute run time using a conventional HPLC column. The UHPLC method also reduced solvent usage by over 90%. The method was shown to be linear, precise, and able to detect parabens at levels within EU and FDA regulations using samples of face lotion and body lotion.
This document describes the development and validation of a stability-indicating UPLC method for the determination of Duloxetine.HCl and its related impurities using a quality by design approach. The method was developed on a Cosmicsil Abra C8 column using a gradient elution of ammonium acetate buffer and acetonitrile:methanol mobile phase. Forced degradation studies were conducted and the method was validated for specificity, linearity, accuracy, precision and robustness according to ICH guidelines. The method was found to be specific, linear, precise, accurate and robust for the analysis of Duloxetine.HCl and its impurities.
This poster shows an HPLC method which builds on the well-established potency method using the Shimadzu Cannabis Analyzer for Potency™, a comprehensive and fast determination of 21 cannabinoids in only 15 minutes (including the wash-step). Cannabinoid profiles for commercially available dry hemp and finished tinctures are presented.
Analysis of Capsaicin and Dihydrocapsaicin in Chili Peppers Using the PerkinE...PerkinElmer, Inc.
Capsaicinoids are the compounds that produce the pungency, aroma and flavor of chili peppers. The two most abundant capsaicinoids in chili peppers are capsaicin (8-methyl-N-vanillyl-trans-6-nonenamide) and dihydrocapsaicin. Combined, these two make up close to 90% of the most pungent varieties of capsaicinoids, with capsaisin making up about 71%. The capsaicin content of peppers is one of the parameters that determine their commercial quality. The amount of capsaicin can vary, depending on the light intensity and temperature at which the plant is grown, the age of the fruit, and the position of the fruit in the plant. Besides their widespread uses in foods, capsaicinoids are increasingly being used as the active component in pharmaceuticals and have been used as an analgesic against arthritis pain and inflammation. They have also been reported to be active against neurogenic inflammation (as in pepper sprays) and have shown protective effects against high cholesterol levels and obesity. Considering the increased use of capsaicinoids in both foods and pharmaceuticals, there is an increasing demand for their accurate quantitation as part of monitoring the quality of chili peppers. In this regard, this application focuses on the extraction, HPLC separation and quantitation of capsaisin and dihydrocapsaicin in two store-bought chili pepper powders.
VALIDATION AND DETERMINATION OF CAFFEINE CONTENT IN ENERGY DRINKS BY USING HP...Ruqsar Fatima
This document outlines the validation and determination of caffeine content in energy drinks using HPLC methods. It includes an introduction on caffeine, the principle of HPLC separation, materials and methods for sample preparation and instrument operation, results and discussion of the validation including calibration curves, precision, accuracy, specificity, LOD and LOQ. The method was found to be precise, accurate, specific and sensitive for quantifying caffeine levels in various energy drinks in under 3 minutes. In conclusion, the validated HPLC method provides an effective quality control technique for caffeine analysis in energy drinks.
The document summarizes the synthesis and characterization of N-substituted tetrahydrocarbazole compounds and their molecular docking studies and antibacterial evaluation. Key steps included synthesizing substituted tetrahydrocarbazoles via refluxing cyclohexanone with substituted phenylhydrazines. The tetrahydrocarbazoles were then reacted with substituted acid chlorides to obtain N-substituted derivatives. The derivatives were characterized using techniques like NMR, IR and tested for antibacterial activity against pathogens using the agar cup method. Molecular docking studies of the derivatives were performed targeting the Gln-6-p enzyme to understand binding interactions.
Our journal has been understands the importance of maintaining high standards in research. This commitment is reflected in its team of scientists and academicians, who dedicate their expertise to assist others in learning and improving their research paper writing skills.
Presenting our research on molecular changes in flower and extract. A visual guide through the production pipeline. With added data sets for better insight.
This document describes two UHPLC-PDA methods for analyzing vitamin E (tocopherol) isomers in e-liquid samples. A 10-minute gradient method separates e-liquid matrix, nicotine, cannabinoids, and three vitamin E isomers. A faster 5-minute isocratic method resolves only the vitamin E isomers. Calibration curves for the vitamin E isomers show good linearity (R2 > 0.999) over concentrations of 1-100 ppm. The methods were applied to analyze six e-liquid samples but did not detect any vitamin E. Coconut oil used in one sample was found to contain interfering compounds at lower detection wavelengths.
Workshop presented by Gregoire Audo from Gilson Purification at the annual meeting of the American Society of Pharmacognosy (ASP 2018) in Lexington, Kentucky.
Shraddha roll no- 7 -m. pharm final presentation ---rbvrr college of pharmacysaathiyaa
The document describes the development and validation of an analytical method for ziprasidone using reverse phase high performance liquid chromatography. The method utilizes a Sunsil C18 column with a mobile phase of water and methanol (55:45) at a flow rate of 1 mL/min. Ziprasidone was detected at 261 nm with a retention time of 3.082 minutes. The method was validated for specificity, precision, linearity, accuracy, limit of detection, limit of quantification and robustness as per ICH guidelines. The developed and validated method can be used for the analysis of ziprasidone in bulk and pharmaceutical formulations.
FT-NIR as a real-time QC tool for polymer manufacturingGalaxy Scientific
Near infrared spectroscopy has been used widely in the polymer industry. Compared to traditional methods such as wet chemistry and chromatographic methods, NIR spectroscopy provides considerable advantages in process and quality control applications through fundamental benefits such as low to no cost of consumables such as solvents, columns, reagents; real time analysis - generally less than 10 seconds measurement time; multiple components per analysis; elimination of sample preparation time; and elimination of many sources of systematic error.
This presentation will present three FT-NIR polymer applications: 1) at line polyether polyols’ hydroxyl value analysis; 2) real time isocyanate number monitoring during a polyurethane reaction; and 3) off-line quality control of percentage styrene in styrene copolymers.
Sucrose low in nanoparticulate impurities for biopharmaceutical formulationsMilliporeSigma
1) The document describes a study to develop a purification process to reduce nanoparticle impurities (NPIs) in sucrose and analyze differences between NPIs from beet- and cane-derived sucrose.
2) Methods like DLS, NTA, and zeta potential analysis show that beet-derived NPIs have a more negative charge and greater impact on protein stability than cane-derived NPIs.
3) A purification method was successfully developed to reduce NPIs in sucrose and launch Sucrose Emprove® Expert, shown to significantly decrease particle concentration compared to non-purified raw materials.
This document outlines the development and validation of a derivative spectroscopic method for estimating serratiopeptidase and diclofenac sodium in bulk and tablet form. The method involves using UV-visible spectrophotometry and derivative spectroscopy to qualitatively and quantitatively analyze the two drugs. The method was developed using the Shimadzu UV-1700 instrument. Standard solutions of the drugs were used to generate calibration curves and determine linearity, accuracy, and precision of the method as per ICH guidelines. The developed and validated method was found to be simple, rapid, precise, and accurate for routine analysis of serratiopeptidase and diclofenac sodium in tablet dosage forms.
Industrial Laboratories around the world are trying to find ways to minimize sample preparation and enhance productivity. The adaptation of modern mass spectrometry instrumentation is desired due to the high sensitivity and selectivity they provide. This presentation will describe how different sample preparation techniques can be simplified and automated for LC/MS/MS analyses.
Similar to Macherey-Nagel Cannabis Testing Brochure (20)
PFAS Testing Solutions from Greyhound Chromatography.
As a global supplier of chromatography consumables and reference standards, Greyhound
Chromatography have brought together in this catalogue, the best products for the analysis of
PFAS compounds from the leading manufacturers in the field.
PFAS (per and polyfluoroalkyl substances) is the collective name for almost 5000 compounds
which have been produced since the 1940s. These compounds are not naturally occurring in
nature so the problems of global pollution are entirely the result of human activity. The utility of
these compounds has resulted in their rapid adoption which has resulted in them being found in
cookware, stain repellents, food packaging, cosmetics, firefighting foams and many
manufacturing processes.
PFAS are known as ‘forever chemicals’ in that they are very persistent in the environment and the
human body, resulting in increasing health risks including damage to immune systems, cancer and
thyroid hormone disruption.
Considerable research has been undertaken to develop products which are specifically suited for
the analysis of PFAS by HPLC, from sample preparation, through to analytical detection.
This brochure brings together many of the leading products used in PFAS analysis, including the
analysis of samples in water, soil, food and beverages as well as serum samples.
PFAS Testing Solutions from Greyhound Chromatography. An overview of the products available that focus specifically on PFAS analysis.
As a global supplier of chromatography consumables and reference standards, Greyhound
Chromatography have brought together in this catalogue, the best products for the analysis of
PFAS compounds from the leading manufacturers in the field.
PFAS (per and polyfluoroalkyl substances) is the collective name for almost 5000 compounds
which have been produced since the 1940s. These compounds are not naturally occurring in
nature so the problems of global pollution are entirely the result of human activity. The utility of
these compounds has resulted in their rapid adoption which has resulted in them being found in
cookware, stain repellents, food packaging, cosmetics, firefighting foams and many
manufacturing processes.
PFAS are known as ‘forever chemicals’ in that they are very persistent in the environment and the
human body, resulting in increasing health risks including damage to immune systems, cancer and
thyroid hormone disruption.
Considerable research has been undertaken to develop products which are specifically suited for
the analysis of PFAS by HPLC, from sample preparation, through to analytical detection.
This brochure brings together many of the leading products used in PFAS analysis, including the
analysis of samples in water, soil, food and beverages as well as serum samples.
PFAS Focus presented by Greyhound Chromatography . Details of products that are available, for laboratory use, for the testing and analysis of PFAS.
Products available from Greyhound Chromatography under their own brand the Q-Range, Reference Standards and Materials from Wellington Laboratories and Chromatography consumables from Macherey-Nagel.
Reference Standards and materials are also available from Chem Service Inc., High Purity Standards and HPC.
Greyhound’s extensive range covers all areas of Environmental, Petrochemical, Food, Fragrance, Forensics, Chemical and Pharmaceutical analysis, holding stock of many popular products for prompt delivery via our extensive logistics network.
Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. With state-of-the art facilities and highly trained staff, Greyhound provides technical advice and distribution of Chromatography consumables across all disciplines. Our service is designed to provide a wide range of products, to help our clients to achieve excellent, cost-effective results. Greyhound manufactures its own range of Capillary Columns, Syringe Filters, SPE Cartridges and HPLC Columns, the 'Q' Range, as well as representing the industry’s best known manufacturers.
Established in 1981, Greyhound Chromatography has been supplying high quality Chromatography consumables to Research and Analysis laboratories around the world for over 40 years. Greyhound's Managing Director, Paul Massie, founded the company which operates from its UK warehouse and office facility, located in Birkenhead, Merseyside.
Greyhound Chromatography is a leading global manufacturer and distributor of the highest quality chromatography columns, consumables, certified reference standards and materials, research chemicals, solvents, reagents and laboratory consumables available today.
Greyhound supplies scientists working in all disciplines, including HPLC and Gas Chromatography. Greyhound Chromatography is probably the leading single source of chromatography products and chemical standards anywhere in the world.
What are Reference Standards?
A pharmaceutical reference standard is a highly characterized material
suitable to test the identity, strength, quality and purity of substances
for pharmaceutical use and medicinal products.
The reference standard is the test, combination of tests, or
procedure that is considered the best available method of categorizing
participants in a study of diagnostic test accuracy as having or not
having a target condition.
Greyhound Chromatography supplies a large range of pre-prepared
and custom made chromatography standards from a number of
leading manufacturers, including Chem Service, Cifga, Extrasynthese,
High Purity Standards, Honeywell (Fluka), Laradon, Merck (Sigma
Aldrich, Supelco), Paragon Scientific and Wellington Laboratories.
Greyhound Chromatography is delighted to represent Merck /Sigma as a principal
distributor and all products from the company are available through Greyhound. Sigma
Aldrich Laboratory & Production Materials, including Supelco Analytical Products developed
by analytical chemists covers a broad range of analytical solutions and every product
undergoes meticulous quality control to maintain the integrity of your testing protocols.
How to Order MERCK/Sigma Aldrich Products from Greyhound Chromatography
MERCK / Sigma Aldrich products can be found under the MERCK portfolio. This is available on
our secure website—you can browse the current product list HERE. Please send your quote
request to sales@greyhoundchrom.com There may be a discount available for bulk
purchases or repeat orders.
High Purity Standards has proudly served the scientific community
for the past twenty years with high quality spectrometric
standards and reference materials for AAS, ICP, ICP-MS, GC,
GC-MS and IC, and has now expanded their stocked reference
materials to include ISO Guide 34 multi-component organic
reference materials.
Approximately one half of High Purity Standards' business is in the
preparation of custom blends and difficult to prepare special
mixtures.
New products of note include expanded spiked filter products in
addition to organic reference materials designed to meet EPA
testing requirements and additional products from customer
requests.
Browse High Purity Standards HERE. There may be a discount
available for bulk purchases or repeat orders, please request a
quotation by emailing sales@greyhoundchrom.com
Wellington are committed to the distribution of quality products as well as the
maintenance of excellent customer service. In fact, in order to provide you with the best
possible service, Wellington Laboratories now have three ISO certifications (ISO
9001:2015, ISO/IEC 17025:2005, and ISO 17034:2016) which cover all aspects of
planning, production, testing, distribution, and post-distribution service. These certificates
allow us to monitor and maintain the highest level of quality and service .
Is Vaping the right solution for giving up smoking nicotine products?
Is Vaping just a case of smoke and mirrors?
Should we be concerned about health issues caused by vaping?
With the vast increase in Vaping being led by the thought
it can stop a users addiction of smoking, do we really have
all the facts we need to determine if this is the truth?
Although e-cigarettes date back to being invented in the
1920’s, it wasn’t until the mid 2000’s that a Chinese
company, owned by pharmacist Hon Lik, created the first
modern vaping device to be sold on the high street.
Recently there has been a lot of media coverage regarding
e-cigarettes and the affect that they have on human
health, there is almost no proven scientific evidence to
say that vaping is better for people than smoking.
We are all aware that smoking is able to cause many known
illnesses and can commonly lead to death, but new stories
have come to light recently, show that vaping has a huge
detrimental effect in the same way that smoking does.
Laws have been implemented in the US since 2016 regarding
the use of vape devices which states it is illegal to
sell e-cigarettes to minors but advertising to adults is
still permitted. There isn’t as much concern that vaping
will effect children in the UK in the same way, as we
have strict limits on the levels of nicotine that can be
included in e-liquids, whereas the US do not.
Considering e-cigarettes were introduced to the market as
a less harmful alternative to smoking, there has been an
increased concern that people have taken up vaping
although they never smoked to begin with.
Electronic Cigarettes (A vape) are small devices that
use different flavoured nicotine oils, also known as
e-juices, to create smoke in a vapour form.
A vaping device does not include or contain tobacco and
therefore doesn’t allow you to produce carbon monoxide
or tar that can be formed from resins that are active
in cigarettes.
How is vape oil (e-juice) made?
Vape juices are generally made by mixing together
different flavours and nicotine with a solvent which
is usually propylene glycol.
Sometimes people will optionally use vegetable
glycerine. The solvent that is used within the mix is
the main chemical that is included in the vape oil.
Propylene glycol is an organic chemical compound that
is most commonly used within foods as an additive to
improve the flavour, colour or texture of different
products.
Currently in the UK, there is estimated to be 3.6 million people who are vaping. It is becoming
more and more common that people have taken up vaping in place of their addictive cigarette
habit, as they believe that this will be “better” for them in the long run. It has been proven
that if there is repeated high exposure to this vapour then very harmful risks could occur.
Recently there have been many cases related to e-cigarettes and the effects that they can cause.
Chem Service, Inc. produces high purity standards for use as reference
materials and for other laboratory purposes. More than 95% of the Standards Grade
materials have a certified purity of 98.0% or greater and do not require purity
corrections when preparing solutions for use with EPA, USTM, UST, and numerous
other international methods. You can trust that Chem Service high purity standards
are a quality product.
Why is Pesticide Testing Important?
Pesticides are an effective tool used by farmers all across the globe to prevent insects, rodents and other pests from
eating or spoiling their crops. Although, because these chemical compounds are deadly to these pests, it has been
important to ensure that pesticides do not have poisonous effects past insects to humans and other aspects of nature.
However, it can be difficult for communities to police pesticides and it is not as effective to test pesticide use after it
has already been applied to a field or farm. For these reasons, there have been a number of international bodies that
have joined together to create testing guidelines to ensure that the pesticides used in the U.S., Australia, Africa and
anywhere else will not result in unwanted repercussions for humans nearby. Pesticide users and manufacturers can
use certified and approved standards to check whether their pesticides meet quality and specification requirements
to work effectively without harmful consequences.
Countries Work Towards a Common Goal
Since the 1960 formation of the Convention on the Organization for Economic Co-operation and Development,
countries including the U.S, U.K., Mexico, Japan, Chile and Germany have created a set of pesticide testing protocols.
The OECD pointed to nearly 100 testing methods for the testing of these chemicals. The international group both
creates guidelines for pesticide uses as well as tests the residue of pesticides in OECD and non-OECD countries to
study their effects and determine further usage plans.
Separate from the OECD, the Collaborative International Pesticide Analytical Council, the Food and Agriculture
Organization of the United Nations, and the World Health Organization also work to regulate safe pesticide use on an
international scale. In a 2005 report published by all three organizations outlining the quality to be used in national
laboratories, they explained the importance of using standards from approved international providers.
Protecting Bees From Pesticides
As far as humans are concerned, bees are one of the most important
insects. Though they aren't the only type of bug that pollinates plants,
they are one of the most common. Bees ensure that plants produce
fruits and vegetables. Without them, whole industries would die and
many would be without a source of food. However, pesticides meant to
rid crops of other harmful insects are having an adverse effect on bee
populations around the world.
PFAS (per- and polyfluoroalkyl
substances), known as “forever
chemicals” are found in everyday
objects. Food Packaging, paints,
cosmetics, wood lacquers, sealants ,
solar panels, fire fighting foams,
artificial grass and many more
seemingly innocent products.
Generally used to prevent corrosion
and make products waterproof and
stain-resistant they are present in our
everyday life. Unfortunately they do
not break down in our environment
and as a consequence are “forever
present”. Greyhound Chromatography provides a wide range of Chromatography related products for testing and analysis of PFAS and many other 'forever chemicals'.
Are all PFAS toxic to humans?
This is a question that remains to be answered.
Research over many years will provide the data
needed to analyse the impact PFAS has on the
environment. Some PFAS, sometimes used in
construction materials are not released into the
air or water table when it rains but they are
released when buildings are demolished and the
debris is sent to landfill.
Some PFAs are of a more immediate concern as they are released into the environment when they
are used or when they come into contact with water. Small residual PFAS molecules wash off
easily and are carried to the soil, air and water very quickly. Many short-chain PFAS dissolve in
water. Gradually, over time, the PFAS sinks to the depths of oceans and rivers, settles in the
sediment and becomes a concern as marine life feeds on plants and other animals that are in the
sediment. Some PFAS such as PFOA act like detergents, they repel water and rise back to the
surface, they are then released into the atmosphere as droplets. Some scientists believe that spray
from the oceans is the biggest source of atmospheric PFAS.
Wellington Laboratories has been committed to providing high quality reference standards and exceptional customer service since its inception in 1980.
The primary source of Standards for EPA Methods 23, 513, 1613, 1668, 8280, 8290, European Method EN-1948 and World Health/EPA Standards, C13 and Native Dioxins, Furans, PCBs and Brominated Diphenyl Ethers, Brominated Dioxins and Furans, Methylated PCDDs and PCDFs, Fluorinated Compounds and more.
Greyhound Chromatography provides a wide range of PFAS related products for testing and analysis.
Wellington Laboratories has been committed to providing high quality reference standards and exceptional customer service since its inception in 1980.
The primary source of Standards for EPA Methods 23, 513, 1613, 1668, 8280, 8290, European Method EN-1948 and World Health/EPA Standards, C13 and Native Dioxins, Furans, PCBs and Brominated Diphenyl Ethers, Brominated Dioxins and Furans, Methylated PCDDs and PCDFs, Fluorinated Compounds and more. Wellington Laboratories' offer a large range of native and mass-labelled per- and poly-fluorinated compounds.
Greyhound Chromatography's trademarked Q-Range Chromatography Laboratory products include Syringe Filters, Vials, Caps and Closures, Seals., HPLC Pump Spares, HPLC Columns, Capillary Columns, Membrane filters.
Established in 1981,Greyhound Chromatography has been supplying high quality Chromatography consumables to Research and Analysis Laboratories around the world for 40 years. Greyhound's Managing Director, Paul Massie founded the company which operates from its UK warehouse and office facility, located in Birkenhead, Merseyside.
Greyhound supplies Certified Reference Standards and Materials, Research Chemicals; including Solvents and Reagents and Laboratory consumables. New products are constantly added to Greyhound's e-commerce website, be sure to register to the website to view product prices.
Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. With state-of-the art facilities and highly trained staff, Greyhound provides technical advice and distribution of Chromatography consumables across all disciplines. Our service is designed to provide a wide range of products, to help our clients to achieve excellent, cost-effective results. Greyhound manufactures its own range of Capillary Columns, Syringe Filters, SPE Cartridges and HPLC Columns, the 'Q' Range, as well as representing the industry’s best known manufacturers.
By working with the industry’s best known manufacturers we are able to tailor products to customer requirements and distribute products on behalf of 3M, AIT, Biosolve; BP (British Pharmacopeia), Cerilliant; Chem Service (Environmental and Pesticides); Chiron; Chromacol; EP Scientific; Extrasynthese, Gas Arc; Hach Lange, Hamilton; High Purity Standards; Honeywell, IDEX; Jour Research; Larodan Fine Chemicals; Macherey-Nagel; Merck, National Scientific; NIST; Paragon Scientific, PAH Reference Standards; Peak Scientific, Pfaltz and Bauer; Regis Technologies; Rheodyne; RT Corporation; SGE analytical, SGT Filters; Sigma Aldrich, Fluka and Supelco; Silicycle, Swagelok; TCI (Tokyo Chemical Industry); Thermo Scientific, Trajan, Upchurch; USP (United States Pharmacopeia); Vici
Chem Service, Inc. produces high purity standards for use as reference materials and for other laboratory purposes. More than 95% of the Standards Grade materials have a certified purity of 98.0% or greater and do not require purity corrections when preparing solutions for use with EPA, USTM, UST, and numerous other international methods. You can trust that Chem Service high purity standards are a quality product.
Established in 1962 Chem Service is the largest independent supplier of Analytical Reference Materials and the original source of small quantities of organic chemicals. Chem Service also has over 2,000 Pesticide Standards, including Pesticide Standards for Cannabis in its catalogue. Chem Service offers Custom made Standards manufactured to your specific requirements, all standards are accredited to ISO 17043:2016; ISO/IEC 17025:2005; ISO 9001:2015 Quality Management System.
Over 95% of Chem Services’ neat Standards Grade materials have a purity of 98.0% or greater.
Chem Services’ worldwide customers are found in the chemical, government, food quality, agricultural and life science research communities.
Chem Service's range of Certified Reference Standards are available from Greyhound Chromatography and Allied Chemicals for fast delivery all over the world.
This document provides information on gas purifiers from Greyhound Chromatography that are designed to remove contaminants from carrier gases used in gas chromatography and mass spectrometry. It describes cartridge-style gas purifiers that contain adsorbent-packed filters in polycarbonate housings connected to base plates for easy filter replacement. Individual filters are available to remove oxygen, moisture, or hydrocarbons. Combination filters remove multiple contaminants. Larger "Big Trap" purifiers are also described. The document explains how purifiers improve analysis quality by reducing baseline noise, column degradation, and other issues caused by contaminated gases.
This document provides information about spare parts for HPLC pumps from various manufacturers that are available from Greyhound Chromatography. It lists pump models from companies like Agilent, Beckman, Dionex, Gilson, Knauer, Waters and others. For each pump model, it provides the original equipment manufacturer (OEM) part number and the corresponding Greyhound part number for replacement pistons, seals, check valves and other spare parts. The document encourages customers to purchase spare parts from Greyhound to save costs compared to the OEM and avoid service calls.
Greyhound Q-Fil Membrane Filters are one of the worlds most popular ranges of Membrane Filters for environmental, industrial, water, food, chemical and biotechnology laboratories.
These high quality membranes are manufactures to the highest specifications to meet the varying requirements of the scientific community.
The Merlin Microseal from greyhound Chromatography is a microvalve alternative to the conventional silicone rubber septa used in Gas Chromatography (GC). Its unique design gives it high pressure capability and resisance to wear which results in long life and excellent chromatographic performance. The microseal is available for all major GC manufacturer's instruments.
Q-range Crimpers and Decappers are the latest development in ergonomic design of manual and electronic devices and transform the standards of vial crimping and decapping. Save time and eliminate repetitive strain when crimping multiple vials. For high volume users, the High Power Crimping Tool will store multiple programmes for different caps and seals and accommodates various sizes of interchangeable jaw sets to increase productivity and ease of use.
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Wellington’s Reference Standards are used mainly in Environmental/analytical testing and toxicological research. Wellington offers an extensive inventory of individual certified reference standards and solution mixtures of native and mass-labelled halogenated organic compounds including polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, polychlorinated biphenyls, halogenated flame retardants and perfluorinated compounds. Wellington also offer a variety of calibration sets and support solutions designed to be used for common regulatory methods of modified in-house methods.
This document provides information on HPLC pumps from Greyhound Chromatography, including specifications and ordering details for various pump models. It describes pumps for isocratic and gradient applications across a range of flow rates and pressures. Models include single piston and dual piston pumps, as well as constant pressure and high pressure pumps. Replacement parts and accessories are also listed. The document aims to help customers select the appropriate pump for their HPLC system and application needs.
The extensive range of Q-Range autosampler and storage vials and caps, caters for almost every conceivable storage requirement from microlitre to millilitre volumes, in clear or amber glass and plastic materials. Complete with screw, crimp and snap top closures and standard or speciality septa and liners. Our products are designed to suit all the major Instrument manufacturers' equipment, including Agilent, Hitatchi, PerkinElmer, Shimadzu, Thermo Scientific, Varian, Waters etc..
Adam Equipment started in 1972 with the goal to provide quality weighing equipment and services at affordable prices, offering superior value to its customers. Adam scales and balances are sold throughout the world, supported by a diversified network of distributors. Adam Equipment and OEM branded products are used by various customers daily. You will see Adam products in the scientific, medical, educational, industrial, manufacturing and retail sectors.
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Macherey-Nagel Cannabis Testing Brochure
1. Analysis of cannabis products for safety and potency
Chromatography
MACHEREY-NAGEL
Cannabis testing
Distributed By:
Greyhound Chromatography and Allied Chemicals
6, Kelvin Park, Birkenhead, Merseyside, CH41 1LT
Tel: +44 (0) 151 649 4000 Fax:+44 (0) 151 649 4001
Email: info@greyhoundchrom.com Sales: sales@greyhoundchrom.com
Orders: orders@greyhoundchrom.com
WWW.GREYHOUNDCHROM.COM
2. 2 www.mn-net.com
Cannabis testing
MN Application database
with a new design
The MN chromatography application database
n Free access to more than 3,000 application examples from HPLC, GC, TLC and SPE.
With simple key word search results are obtained in seconds. All applications come
with detailed method description including information about samples, conditions
and detection.
nhttps://chromaappdb.mn-net.com/
3. 3www.mn-net.com
Contents
Potency testing in cannabis extracts using a LC–UV approach with additional MS/MS
identification 4
Determination of pesticide residues in Cannabis sativa using an optimized QuEChERS
method with a low amount of carbon in the clean-up mix 8
Determination of pesticide residues in Cannabis sativa using an optimized QuEChERS
method with high matrix reduction 18
Fast and simple High Performance Liquid Chromatography – Ultraviolet assay for the
determination of cannabinoids in hemp products with additional MS/MS identification 28
Determination of cannabinoids (THC) in human urine with LC-MS 34
Determination of cannabinoids (THC) in urine samples with GC-MS 38
Determination of cannabinoids (THC) in plasma and serum samples with GC-MS 42
4. 4 www.mn-net.com
Potency testing in cannabis extracts using LC–UV approach
Potency testing in cannabis extracts using a LC–UV
approach with additional MS/MS identification
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen, T. Kretschmer
Abstract
This application note describes the determination of cannabinoids
in Cannabis sativa using a LC–UV approach. Cannabis sativa was
extracted according to DAC/NRF monograph and analyzed by
HPLC–UV on a NUCLEOSHELL RP 18 column. Identification of
contained cannabinoids was performed by HPLC–UV–MS/MS.
®
Introduction
With the legalization of medical and recreational use of cannabis
and cannabis-based products (e.g. concentrated oils, soda, LC Method Parameters
candy and other edible forms) the need of quality control method-
ologies has grown year by year [1]. There is an increasing supply
of various cannabis and cannabis-based products with adjusted
potency. To verify the potency classification, the determination
of cannabinoids in marijuana has become an important meth-
odology of quality control for producers and distributors. Addi-
tionally, the cannabinoid profile in combination with the terpene
profile is an important information that helps to determine the
plant variety. Sample preparation has been carried out according
to DAC/NRF regulations [2].
New quality control methods have to be developed to ensure
product safety and to treat patients with the right amount of drug.
These methods have to be quick, easy and cost-efficient. Using
NUCLEOSHELL core-shell particle technology, highest column
efficiency and resolution at a short run time with much lower back
pressure compared to fully porous particles could be achieved
with common HPLC systems.
®
This work presents a quick, easy and cost-efficient LC–UV
method for the simultaneous analysis of cannabinoids from Can-
nabis sativa. In addition, cannabinoids were identified by LC–MS/
MS.
Sample pretreatment
Sample material
Three varieties of Cannabis sativa of different potency classes
were purchased:
I: Δ⁹-tetrahydrocannabinol >> cannabidiol
II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol
III: Δ⁹-tetrahydrocannabinol << cannabidiol
Extraction
n Weigh out 0.5 g of homogenized sample (milled in a grinder)
into a 50 mL centrifuge tube (REF 730223)
n Add 20 mL ethanol and shake for 15 min
n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
n Fill the supernatant in a 50 mL flask
n Repeat extraction of the residue twice with 12.5 mL of ethanol
and combine the extracts
n Fill up the flask to 50 mL with ethanol
n Filter 1 ml of the extract through a syringe filter with regener-
ated cellulose (membrane pore size 0.45 µm, REF 729231)
into a 10 mL flask
n Fill up with ethanol to 10 mL
n Use this mixture for HPLC analysis (REF 702293, REF 702107)
Chromatographic conditions
Column: EC NUCLEOSHELL RP 18, 50
2.7 µm (REF 763152.40)
x 4 mm,®
Eluent A: 0.1 % formic acid in water
Eluent B: 0.1 % formic acid in acetonitrile
Gradient: in 5 min from 60 % to 95 % B, hold for
5.0 min, in 0.1 min to 60 % B, hold 60 % B
for 4.9 min
Flow rate: 0.7 mL/min
Temperature: 40 °C
Injection volume: 1 μL
Detection: UV @ 225 nm, 306 nm
MS conditions for peak identification
AB Sciex API 3200
Acquisition mode: SRM
Interface: ESI
Polarity: positive/negative
Curtain gas: 20 psig
CAD: 3.0 psig
Ion spray voltage, ESI positive: 4500 V
Ion spray voltage, ESI negative: – 4500 V
Temperature: 500 °C
Ion source gas 1: 45 psig
Ion source gas 2: 45 psig
Detection window: 90 s
Injection volume: 5 µL
Sample solution from LC–UV was diluted ten times with methanol
for identification with positive polarity and 100 times with metha-
nol for identification with negative polarity because of high analyte
concentration of cannabinoids in cannabis extracts.
5. 5www.mn-net.com
Potency testing in cannabis extracts using LC–UV approach
MRM transitions
Analyte Abbr. [M+H]+
Q1 Q2
Cannabigerol CBG 317.2 193.1 123.1
Cannabidiol CBD 315.1 193.1 259.1
Cannabinol CBN 311.1 223.2 241.0
Δ⁹-tetrahydrocannabinol THC 315.1 193.1 259.1
Cannabichromene CBC 315.1 193.1 81.0
Table 1: MRM transitions of cannabinoids from Cannabis sativa (positive po-
larity). (Abbr. = Abbreviation, Q 1
= Quantifier, Q 2
= Qualifier)
Analyte Abbr. [M-H]–
Q1 Q2
Cannabidiolic acid CBDA 357.1 313.1 245.0
Cannabigerolic acid CBGA 359.1 341.2 315.2
Δ -tetrahydrocannabinolic acid9
THCA 357.1 313.1 191.0
Table 2:MRM transitions of cannabinoids from Cannabis sativa (negative po-
larity). (Abbr. = Abbreviation, Q 1
= Quantifier, Q 2
= Qualifier)
Batch-to-batch reproducibility of NUCLEOSHELL
RP 18 columns
®
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
Absorbance[mAU]
Figure 1: Comparison of chromatograms from an extract of Cannabis sativa (va-
riety class II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol) on four different
batches of NUCLEOSHELL RP 18, UV-VIS 1 = 225 nm.®
Representative chromatograms
300
200
100
0
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Time [min]
CBGA-2.725
CBN-3.600
THC-4.017
THCA-4.433
Absorbance[mAU]
Figure 3: Chromatogram of an extract from Cannabis sativa (variety class I:
Δ⁹-tetrahydrocannabinol >> cannabidiol), UV-VIS 1 = 225 nm, UV-VIS
2 = 306 nm.
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
CBDA-2.617
CBGA-2.725
CBD-2.975
THC-4.008
THCA-4.425
Absorbance[mAU]
Figure 4: Chromatogram of an extract from Cannabis sativa (variety class II:
Δ⁹-tetrahydrocannabinol ≈ cannabidiol), UV-VIS 1 = 225 nm, UV-VIS
2 = 306 nm.
250
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
CBDA-2.617
CBD-2.975
THCA-4.433
Absorbance[mAU]
Figure 5: Chromatogram of an extract from Cannabis sativa (variety class III:
Δ⁹-tetrahydrocannabinol << cannabidiol), UV-VIS 1 = 225 nm, UV-VIS
2 = 306 nm.
Figure 2: Marijuana plant leaves.
6. 6 www.mn-net.com
Potency testing in cannabis extracts using LC–UV approach
Batch-to-batch reproducibility of Cannabis sativa samples
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
CBDA-2.617
CBD-2.975
THC-4.017
THCA-4.433
Absorbance[mAU]
Figure 6: Comparison of chromatograms from an extract of Cannabis sativa (va-
riety class II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol) on three different
batches, UV-VIS 1 = 225 nm, UV-VIS 2 = 306 nm, batch 1.
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
CBDA-2.617
CBD-2.975
THC-4.008
THCA-4.425
Absorbance[mAU]
Figure 8: Comparison of chromatograms from an extract of Cannabis sativa (va-
riety class II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol) on three different
batches, UV-VIS 1 = 225 nm, UV-VIS 2 = 306 nm, batch 2.
200
150
100
50
0
-50
-100
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Time [min]
CBDA-2.617
CBD-2.975
THC-4.008
THCA-4.425
Absorbance[mAU]
Figure 9: Comparison of chromatograms from an extract of Cannabis sativa (va-
riety class II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol) on three different
batches, UV-VIS 1 = 225 nm, UV-VIS 2 = 306 nm, batch 3.
Peak number Peak name Ret. time [min] Area batch 1 Area batch 2 Area batch 3 Peak ratio
batch 1
Peak ratio
batch 2
Peak ratio
batch 3
1 CBDA 2.62 4.463 4.295 4.019 0.582 0.578 0.575
4 CBD 2.98 0.545 0.568 0.528 0.071 0.076 0.076
6 THC 4.01 0.779 0.791 0.717 0.102 0.106 0.103
7 THCA 4.43 1.879 1.780 1.721 0.245 0.239 0.246
Peak number Peak name Ret. time [min] Area batch 1 Area batch 2 Area batch 3 Peak ratio
batch 1
Peak ratio
batch 2
Peak ratio
batch 3
1 CBDA 2.62 0.727 0.706 0.683 0.639 0.645 0.641
2 THCA 4.43 0.412 0.388 0.381 0.361 0.355 0.359
Table 3:Comparison of peak area and peak ratio from an extract of Cannabis sativa (variety class II: Δ⁹-tetrahydrocannabinol ≈ cannabidiol) on three different
batches, UV-VIS 1 = 225 nm, UV-VIS 2 = 306 nm, batch 1–3.
7. 7www.mn-net.com
Potency testing in cannabis extracts using LC–UV approach
MS/MS identification of cannabinoids
9.0e4
8.0e4
6.0e4
4.0e4
2.0e4
0.0
3.5e4
3.0e4
2.0e4
1.0e4
0.0
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
Time [min]
1.3e4
1.0e4
5.0e3
0.0
5.0e5
4.0e5
3.0e5
2.0e5
1.0e5
0.0
2.3e4
2.0e4
1.5e4
1.0e4
5.0e3
0.0
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
Time [min]
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Time [min]
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Time [min]
3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 6.2 6.4 6.6 6.8 7.0
Time [min]
CBG - 317.152/193.100
CBD - 315.127/193.100
CBN - 311.086/223.200
THC - 315.127/193.100
CBC - 315.127/193.100
Intensity[cps]Intensity[cps]Intensity[cps]Intensity[cps]Intensity[cps]
Figure 10: Chromatogram of an extract from Cannabis sativa (variety class II:
Δ⁹-tetrahydrocannabinol ≈ cannabidiol) (positive polarity).
4.3e4
4.0e4
3.5e4
3.0e4
2.5e4
2.0e4
1.5e4
1.0e4
5.0e3
0.0
3.5e4
3.0e4
2.5e4
2.0e4
1.5e4
1.0e4
5.0e3
0.0
1.3e5
1.2e5
1.0e5
8.0e4
6.0e4
4.0e4
2.0e4
0.0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
Time [min]
1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
Time [min]
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Time [min]
CBDA - 357.100/313.100
CBGA - 359.121/341.200
THCA - 357.100/313.100
Intensity[cps]Intensity[cps]Intensity[cps]
Figure 11: Chromatogram of an extract from Cannabis sativa (variety class II:
Δ⁹-tetrahydrocannabinol ≈ cannabidiol) (negative polarity).
Conclusion
This application note shows a simple chromatographic sepa-
ration of major cannabinoids from marijuana samples in less
than ten minutes. A good batch-to-batch reproducibility of
NUCLEOSHELL RP 18 can be seen in figure 1. In this work,
the cannabinoid profile of three different cannabis varieties could
be shown and sample materials could be successfully assigned
to their described potency class. The figures 6, 8, and 9 show a
batch-to-batch reproducibility of three different marijuana sam-
ples of the same variety.
®
The separation was achieved with sufficient resolution for major
cannabinoids and is suitable for qualification and quantification. In
addition, the identification of cannabinoids by mass spectrometry
was successfully performed with presented chromatographic
conditions on a NUCLEOSHELL RP 18 column.®
References
[1] R. L. Pacula, R. Smart Annu. Rev. Clin. Psychol. 2017 May 8;
13: 397–419.
[2] DAC/NRF 2016/1, C-053, Cannabisblüten (Cannabis flos).
8. 8 www.mn-net.com
Pesticide residues in cannabis
Determination of pesticide residues in Canna-
bis sativa using an optimized QuEChERS meth-
od with a low amount of carbon in the clean-up
mix
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen, T. Kretschmer
Abstract
This application note describes the determination of pesticide res-
idues in Cannabis sativa using a QuEChERS method for sample
clean-up. Interfering substances (like e.g., lipids and pigments),
which were also extracted with the organic layer, are removed
by optimized amounts of GCB (graphitized carbon black) and
CHROMABOND C ec adsorbents. The organic extracts are
finally analyzed by HPLC-MS/MS.
®
18
Introduction
There is an increasing interest in the determination of pesticide
residues in marijuana. While medical and recreational use of can-
nabis are legalized in more and more U.S. territories, the markets n Add 100 μL of standard solution (β = 1 µg/mL for each analyte
for cannabis and cannabis-based products (e.g. concentrated
oils, soda, candy and other drinkable or edible forms) have grown
year by year in North America and also in other countries . To
saturate the huge demand for marijuana the cultivation of hemp
gets professional to improve growth yields. The use of pesticides
is a common tool for this monocultural plant production.
[1]
New quality control methods have to be developed to ensure
pro-duct safety and to reduce health risks by chronic exposure n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
to pesticides. These methods have to be quick, easy, cheap, ef-
fective, rugged and safe like the QuEChERS extraction approach
[2]
. Interfering substances (like e.g., lipids and chlorophyll), which
were also extracted with the organic layer, are removed by opti-
mized clean-up mixes. On the other side, the composition of the
clean-up mix has to ensure high recovery rates for pesticides, n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
as well as adequate matrix removal properties. Therefor the
respective mix needs to contain a sufficient amount of carbon
adsorbent.
This work presents a QuEChERS method for the simultaneous
analysis of more than 160 pesticides from Cannabis sativa. The
organic extracts are finally analyzed by HPLC-MS/MS. Column:
Figure 1: Marijuana (Cannabis sativa).
Dispersive solid phase extraction (dSPE)
Products for clean-up from competitors
Competitor 1:
QuEChERS dispersive kit, 15 mL centrifuge tube, 1200
MgSO , 400 mg PSA, 400 mg C ec, 45 mg GCB
mg
4 18
Competitor 2:
QuEChERS SPE Q-sep, 15 mL centrifuge tube, 900 mg MgSO ,4
300 mg PSA, 300 mg C , 45 mg GCB18
Extraction
n
Weigh out 1g of homogenized sample (milled in a grinder) into
a 50 mL centrifuge tube (REF 730223)
in acetonitrile) for determining recovery rates
n Add 10 mL water and shake
n Add 10 mL 1 % acetic acid in acetonitrile and shake for 30 min
n Add the CHROMABOND QuEChERS extraction mix I
(REF 730970)
®
n Shake vigorously for 2 min and cool down the mixture in an ice bath
Clean-up
n
Add 6 mL of acetonitrile supernatant to the CHROMABOND
QuEChERS clean-up mix XLIX (REF 7300000)
®
n Shake vigorously for 60 s
n Take acetonitrile extract for injection
Subsequent analysis: HPLC-MS / MS
Chromatographic conditions
EC NUCLEOSHELL Bluebird RP 18,®
50 x 4.6 mm, 2.7 µm (REF 763432.46)
Eluent A: 0.1 % formic acid in water
Eluent B: 0.1 % formic acid in acetonitrile
Gradient: in 5 min from 5 % to 100 % B, hold for
1.0 min, in 0.1 min to 5 % B, hold 5 % B for
3.9 min
Flow rate: 0.7 mL/min
Temperature: 30 °C
Injection volume: 2 μL
13. 13www.mn-net.com
Pesticide residues in cannabis
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
1.9e6
1.8e6
1.736
1.6e6
1.5e6
1.4e6
1.3e6
1.2e6
1.1e6
1.0e6
9.0e5
8.0e5
7.035
6.0e5
5.0e5
4.0e5
3.0e5
2.0e5
1.0e5
0.0
Time [min]
Intensity[cps]
Figure 2: Separation of pesticides on NUCLEOSHELL Bluebird RP 18 column (QuEChERS extract of Cannabis sativa spiked with β = 100 µg/g).®
Matrix reduction
Acetonitrile extract of
Cannabis sativa
Extract after QuEChERS
clean-up with mix from
competitor 1
Extract after QuEChERS
clean-up with mix from
competitor 2
Extract after QuEChERS
clean-up with mix from
MACHEREY-NAGEL
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
Drymassofextract[g/mL]
Figure 3: Comparison of drying residue of extracts before and after using
clean-up.
— Acetonitrile extract of Cannabis sativa
— Extract after QuEChERS clean-up with mix from competitor 1
— Extract after QuEChERS clean-up with mix from competitor 2
Extract after QuEChERS clean-up with mix from MACHEREY-NAGEL—
200 300 400 500 600 700
4
3.5
3
2.5
2
1.5
1
0.5
0
Absorbance[mAU]
Wavelength [nm]
Figure 4: Comparison of spectra of extracts before and after using clean-up.
Recovery rates
QuEChERS clean-up with mix from competitor 1
QuEChERS clean-up with mix from competitor 2
QuEChERS clean-up with mix from MACHEREY-NAGEL
15 35 55 75 95 115 135 155 175
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
RecoveryRate[%]
Figure 5: Comparison of recovery rates between MACHEREY-NAGEL and
different competitors.
QuEChERS clean-up with mix from competitor 1
QuEChERS clean-up with mix from competitor 2
QuEChERS clean-up with mix from MACHEREY-NAGEL
0% < x ≤ 50% 50% < x ≤ 70% 70 < x ≤ 120%
180
160
140
120
100
80
60
40
20
0
Numberofpesticides
Recovery rate range
Figure 6:Comparison of distribution of recovery rates between
MACHEREY-NAGEL and different competitors.
17. 17www.mn-net.com
Pesticide residues in cannabis
QuEChERS clean-up mix from MN QuEChERS clean-up mix from comp. 1 QuEChERS clean-up mix from comp. 2
Analyte Recovery rate [ %] Recovery rate [ %] Recovery rate [ %]
Spinetoram 66.4 ± 11.8 75.1 ± 12.8 70.4 ± 10.6
Spinosad (Spinosyn A) 70.9 ± 6.4 75.9 ± 12.2 64.0 ± 21.5
Spinosad (Spinosyn D) 71.0 ± 7.6 75.6 ± 15.6 70.8 ± 21.8
Spirotetramat 93.9 ± 11.0 101.3 ± 6.4 93.1 ± 8.7
Spiroxamine isomer 1 71.1 ± 6.5 75.2 ± 7.8 59.0 ± 6.8
Spiroxamine isomer 2 77.2 ± 7.8 79.7 ± 3.2 60.8 ± 14.7
Sulfentrazone 108.5 ± 13.2 119.0 ± 9.0 112.2 ± 12.7
Tebuconazole 90.0 ± 10.0 105.2 ± 13.7 95.3 ± 6.1
Tebufenozide 95.9 ± 12.6 111.4 ± 11.7 96.7 ± 7.8
Tebufenpyrad 95.3 ± 10.3 98.9 ± 7.0 90.9 ± 16.4
Tebuthiuron 92.8 ± 14.0 89.4 ± 17.3 90.1 ± 19.2
Terbumeton 85.1 ± 7.7 77.1 ± 13.7 77.6 ± 4.4
Terbutryn 82.1 ± 7.9 91.9 ± 4.5 74.9 ± 12.3
Tetraconazole 96.4 ± 12.1 103.2 ± 5.7 100.2 ± 10.1
Thiacloprid 91.8 ± 15.5 110.2 ± 13.8 98.6 ± 12.6
Thiamethoxam 98.5 ± 8.9 105.3 ± 7.1 108.0 ± 13.3
Thidiazuron 31.9 ± 8.7 29.3 ± 13.3 41.6 ± 11.4
Thiobencarb 95.3 ± 22.0 118.1 ± 16.7 100.7 ± 9.1
Thiophanate-methyl 77.8 ± 14.1 117.3 ± 6.3 102.6 ± 15.8
Triadimefon 97.7 ± 11.1 107.3 ± 7.6 101.4 ± 11.0
Triadimenol 103.3 ± 7.9 107.4 ± 6.5 95.0 ± 9.6
Trichlorfon 97.1 ± 12.1 112.9 ± 21.0 89.0 ± 11.2
Tricyclazole 87.5 ± 9.7 85.5 ± 20.1 88.3 ± 18.5
Trifloxystrobin 88.8 ± 10.0 101.9 ± 9.1 112.8 ± 5.6
Triflumuron 108.5 ± 9.9 out of specification* 113.2 ± 12.7
Triticonazole 100.2 ± 8.8 106.4 ± 8.3 93.9 ± 8.9
Vamidothion 98.6 ± 12.1 96.0 ± 12.0 91.9 ± 8.7
Zoxamide 95.6 ± 9.8 112.4 ± 8.4 102.7 ± 13.1
Table 2: Recovery rates for presented QuEChERS clean
*specification = 0 – 120 % ± 25 %
-up mixes. The recovery rates are calculated by matrix matched standard calibration.
Conclusion
This application note shows the reliable and successful deter-
mination of pesticide residues from marijuana samples with an
optimized QuEChERS method. The optimized composition
of QuEChERS salt clean-up mixes leads to high reduction of
matrix components and high recovery rates for pesticides. The
presented QuEChERS method resulted in an average recovery
rate of 90.2 % for 175 pesticides. Most of the pesticides (162
analytes) show recovery rates between 70 % to 120 %. On the
other side, high matrix reduction yields are achieved by using
the presented clean-up mix. The amount of dry substance after
clean-up is reduced to less than 40 % of raw acetonitrile extracts.
With this clean-up approach interfering substances (like e.g.,
lipids and pigments) are successfully removed due to optimized
amounts of GCB and CHROMABOND C ec adsorbents.
®
18
The chromatographic separation of pesticides was performed
using core-shell particles that are well known for fast and high-ef-
ficient separations combined with a reasonably low backpres-
sure. In this work, a subsequent analytics was developed on a
NUCLEOSHELL Bluebird RP 18 column.®
References
[1] R. L. Pacula, R. Smart, Annu. Rev. Clin. Psychol. 2017 May
8, 13: 397–419.
[2] M. Anastassiades, S. J. Lehotay, D. Stajnbaher, F. J. Schenck,
J. AOAC Int. 86 (2003), 412–431.
18. 18 www.mn-net.com
Pesticide residues in cannabis with high matrix reduction
Determination of pesticide residues in Canna-
bis sativa using an optimized QuEChERS meth-
od with high matrix reduction
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen, T. Kretschmer
Abstract
This application note describes the determination of pesticide Products from competitors
residues in Cannabis sativa using a QuEChERS method for
most effective sample clean-up. Interfering substances (like
e.g., lipids and pigments), which were also extracted with the
organic layer, are almost completely removed with clean-up salt
mixes with high amounts of GCB (graphitized carbon black) and
CHROMABOND C ec adsorbents. The organic extracts are
finally analyzed by HPLC-MS/MS.
®
18
Introduction
While medical and recreational use of cannabis are legalized in QuEChERS SPE Resprep Q352, 15
more and more U.S. territories the markets for cannabis and can-
nabis-based products (e.g. concentrated oils, soda, candy and
other edible forms) have grown year by year in North America and
also in other countries
professional cultivation forms of hemp to improve growth yields.
The use of pesticides is a common tool for this monoculture plant
production. Therefor an increasing interest in the determination of
pesticide residues in marijuana is given.
[1]
. A huge demand for marijuana has lead to
New quality control methods have to be developed to ensure
product safety and to reduce health risks by chronic exposure to n Add the CHROMABOND QuEChERS extraction mix I (REF
pesticides. These methods have to be quick, easy, cheap, effec-
tive, rugged and safe like the QuEChERS extraction approach .
Interfering substances (like e.g., lipids and chlorophyll), which
were also extracted with the organic layer, are nearly completely
removed by using clean-up salt mixes with high amounts of GCB
[2]
and of CHROMABOND C®
18 ec adsorbents. On the other side,
the composition of the clean-up salt mixes also has to ensure n Add 6 mL of acetonitrile supernatant to the CHROMABOND
sufficient recovery rates for these pesticides. This work presents
a QuEChERS method for the simultaneous analysis of more than
160 pesticides from Cannabis sativa. The organic extracts are
finally analyzed by HPLC-MS/MS.
Figure 1: Marijuana (Cannabis sativa).
Dispersive solid phase extraction (dSPE)
Competitor 1:
Supel™ QuE PSA/C /ENVI-Carb tube, 15 mL centrifuge tubes,
1200 mg MgSO , 400 mg Supleclean PSA, 400 mg Discovery
DSC-18 und 400 mg ENVI-Carb
18
4
Competitor 2:
roQ™ QuEChERS dSPE kit, 15 mL centrifuge tubes, 1200 mg
MgSO , 400 mg PSA, 400 mg C4 18 ec, 400 mg GCB
Competitor 3:
mL centrifuge tubes,
1200 mg MgSO , 400 mg PSA, 400 mg C4 18, 400 mg Carbon
Extraction
n Weigh out 1 g of homogenized sample (milled in a grinder) into
a 50 mL centrifuge tube (REF 730223)
n Add 100 μL of standard solution (β = 1 µg/mL for each analyte
in acetonitrile) for determining recovery rates
n Add 10 mL water and shake
n
Add 10 mL 1% acetic acid in acetonitrile and shake for 30 min
®
730970)
n Shake vigorously for 2 min and cool down the mixture in an ice
bath
n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
Clean-up
®
QuEChERS clean-up mix XLVII (REF 730845)
n Shake vigorously for 60 s
n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
n Take acetonitrile extract for injection (REF 702293, REF
702107)
27. 27www.mn-net.com
Pesticide residues in cannabis with high matrix reduction
QuEChERS clean-up mix
from MACHEREY-NAGEL
QuEChERS clean-up mix
from competitor 1
QuEChERS clean-up mix
from competitor 2
QuEChERS clean-up mix
from competitor 3
Analyte Recovery rate [ %] Recovery rate [ %] Recovery rate [ %] Recovery rate [ %]
Trichlorfon 113.7 ± 17.4 99.9 ± 21.6 out of specification* 99.1 ± 5.8
Tricyclazole 24.2 ± 15.7 out of specification* out of specification* 25.7 ± 18.1
Trifloxystrobin 108.0 ± 17.4 98.7 ± 5.8 out of specification* 102.2 ± 10.7
Triflumizole 113.7 ± 10.1 108.1 ± 14.3 93.2 ± 6.5 104.0 ± 12.0
Triflumuron 89.4 ± 11.6 88.0 ± 17.0 92.2 ± 7.6 105.8 ± 9.5
Triticonazole 93.9 ± 7.6 83.1 ± 5.9 77.7 ± 6.2 90.3 ± 10.1
Vamidothion 117.2 ± 14.0 94.4 ± 11.5 94.6 ± 13.4 91.1 ± 4.5
Zoxamide 103.1 ± 12.1 101.4 ± 6.3 114.6 ± 10.4 105.7 ± 7.0
Table 2:Recovery rates for presented QuEChERS clean-up mixes. The recovery rates that are calculated by matrix matched standard calibration.
*specification = 0 – 120 % ± 25 %
Conclusion
This application note shows the reliable and successful deter-
mination of pesticide residues from marijuana samples with an
optimized QuEChERS method. The optimized composition of
QuEChERS salt clean-up mixes leads to high reduction of matrix
components and to high recovery rates for pesticides. The pre-
sented QuEChERS method leads to an average recovery rate for
pesticides of 92.3 % for 162 pesticides. Most of the pesticides
(138 analytes) show recovery rates between 70 % to 120 %. On
the other side, high matrix reduction yields were also possible by
using the presented clean-up mix. The amount of dry substance
after clean-up is reduced to less than 70 % of raw acetonitrile
extracts. With this clean-up approach interfering substances (like
e.g., lipids and pigments) are successfully removed due to high
amounts of GCB and CHROMABOND C ec adsorbents.
®
18
The chromatographic separation of pesticides was performed
by using core-shell particles that are well known for fast and
high-efficient separations combined with a reasonably low back
pressure. In this work, a subsequent analytics was developed on
a NUCLEOSHELL Bluebird RP 18 column.®
References
[1] R. L. Pacula, R. Smart, Annu. Rev. Clin. Psychol. 2017 May
8, 13: 397–419.
[2] M. Anastassiades, S. J. Lehotay, D. Stajnbaher, F. J. Schenck,
J. AOAC Int. 86 (2003), 412–431.
28. 28 www.mn-net.com
Determination of cannabinoids in hemp products
Fast and simple High Performance Liquid Chro-
matography – Ultraviolet assay for the determi-
nation of cannabinoids in hemp products with
additional MS/MS identification
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen, T. Kretschmer, S. Schneider
Abstract
This application note describes the determination of cannabi-
noids in hemp products using a LC–UV assay. Hemp products
like tea, flour and buds were extracted according to DAC/NRF
monograph and analyzed by HPLC–UV on a NUCLEOSHELL
RP 18 column. Hemp oil was diluted with methanol, filtered and
analyzed like plant extracts. Identification of contained cannabi-
noids was additionally performed by HPLC–UV–MS/MS.
®
Introduction
Hemp products are often used because of their nutraceutical,
cosmetic and pharmaceutical properties and are becoming more
popular. Hemp seeds and flowers can be consumed or used to
produce a variety of food products including hemp milk, hemp
oil, hemp cheese substitutes, hemp flower tea, hemp flower
flour or other plant powders. Hemp is commonly confused with n Repeat extraction of the residue twice with 12.5 mL of ethanol
marijuana. It belongs to the same family, but the two plants are
very different. Marijuana is grown to contain high amounts of tet-
rahydrocannabinol (THC), the chemical that is responsible for its
psychoactive properties. Hemp describes the edible plant parts
like seeds or flowers and only contains a trace amount of THC.
From the perspective of medical law, hemp extracts and hemp
products in most countries may only be sold to consumers in Eu-
rope if they were obtained exclusively from hemp and their THC
content is ≤ 0.2 % [1]. The limit of THC content leads to a need n Add 1 mL isopropyl alcohol and shake for 1 min
of fast and simple methods for potency testing by HPLC–UV. The
producers have to ensure that the products contain less than
0.2 % THC to comply with European law.
Sample preparation of hemp flower products was carried out ac-
cording to DAC/NRF regulations [2]. For sample matrices that are
complex or heavily processed this work shows a SPE method for
cannabinoids that allows an effective enrichment of concentrated
compounds.
The cannabinoids are determined by HPLC–UV using
NUCLEOSHELL core-shell particle technology. The well known
advantages of these columns are highest column efficiency and
resolution at a short run time with much lower back pressure
compared to fully porous particles.
®
This work presents a quick, easy and cost-efficient LC–UV
method for the simultaneous analysis of cannabinoids from sev-
eral hemp products. In addition, cannabinoids were identified by
LC–MS/MS.
Sample pretreatment
Sample material
n Hemp flower tea
n Hemp flower flour
n Hemp flower buds
n
Hemp oil
n
Hemp CO extract2
Extraction procedure for tea, flour and buds
n Weigh out 0.5 g of homogenized sample (milled in a grinder)
into a 50 mL centrifuge tube (REF 730223)
n Add 20 mL of ethanol and shake for 15 min
n Centrifuge the mixture at 4500 rpm, for 5 min at 4 °C
n Fill the supernatant in a 50 mL flask
and combine the extracts
n Fill up the flasks to 50 mL with ethanol
n Filter 1 mL of extract through a syringe filter with regenerated
cellulose (membrane pore size 0.45 µm, 729231) into a vial for
HPLC analysis (REF 702293, REF 702107)
Extraction procedure for oil and CO₂ extract
n Weigh out 0.1 g of homogenized oil into a 25 mL flask
n Fill up the flask to 25 mL with methanol
n Filter 1 mL of extract through a syringe filter with regenerated
cellulose (membrane pore size 0.45 µm) into a 10 mL flask
n Fill up with methanol to 10 mL
n Use this mixture for HPLC analysis (REF 702293, REF 702107)
Figure 1: Hemp products (tea, flour, oils).
29. 29www.mn-net.com
Determination of cannabinoids in hemp products
LC Method parameters
Chromatographic conditions
Column: EC NUCLEOSHELL RP 18, 50 x 4.0
2.7 µm (763152.40)
®
mm,
Eluent A: 0.1 % formic acid in water
Eluent B: 0.1 % formic acid in acetonitrile
Gradient: in 5 min from 60 % to 95 % B, hold for
5.0 min, in 0.1 min to 60 % B, hold 60 % B
for 4.9 min
Flow rate: 0.7 mL/min
Temperature: 40 °C
Injection volume: 2 μL
Detection: UV @ 225 nm, 306 nm
MS conditions for peak identification
AB Sciex API 3200
Acquisition mode: SRM
Interface: ESI
Polarity: positive/negative
Curtain gas: 20 psig
CAD: 3.0 psig
Ion spray voltage, ESI positive: 4500 V
Ion spray voltage, ESI negative: –4500 V
Temperature: 500 °C
Ion source gas 1: 45 psig
Ion source gas 2: 45 psig
Detection window: 90 s
Injection volume: 5 μL
MRM transitions
Analyte Abbr. [M+H]⁺ Q1 Q2
Cannabigerol CBG 317.2 193.1 123.1
Cannabidiol CBD 315.1 193.1 259.1
Cannabinol CBN 311.1 223.2 241.0
Δ⁹-tetrahydrocannabinol THC 315.1 193.1 259.1
Cannabichromene CBC 315.1 193.1 81.0
Δ⁹- tetrahydrocannabivarin THCV 287.1 165.0 77.1
Cannabidivarin CBDV 287.1 123.2 77.1
Table 1: MRM transitions of cannabinoids from hemp products (positive po-
larity). (Q1
= Quantifier, Q 2
= Qualifier)
Analyte Abbr. [M–H]–
Q1 Q2
Cannabidiolic acid CBDA 357.1 313.1 245.0
Cannabigerolic acid CBGA 359.1 341.2 315.2
Δ⁹-tetrahydrocannabinolic acid THCA 357.1 313.1 191.0
Table 2: MRM transitions of cannabinoids from hemp products (negative po-
larity). (Q1
= Quantifier, Q 2
= Qualifier)
Representative chromatograms for hemp products
400
300
200
100
0
-150
25
20
15
10
5
0
-2
0 1 2 3 4 5 6 7
Time [min]
0 1 2 3 4 5 6 7
Time [min]
CBD-2.958
CBN-3.583
THC-4.000
THCA-4.417
CBDA-2.608CBDA-2.608
THCA-4.417
Absorbance[mAU]Absorbance[mAU]
A
B
Figure 2: Chromatograms of an extract from hemp flower tea, @ 225 nm (A),
306 nm (B).
400
300
200
100
0
-150
25
20
15
10
5
0
-2
0 1 2 3 4 5 6 7
Time [min]
0 1 2 3 4 5 6 7
Time [min]
CBD-2.967
CBN-3.583
THC-4.000
THCA-4.425
CBDA-2.608
CBDA-2.608
THCA-4.425
Absorbance[mAU]Absorbance[mAU]
A
B
Figure 3:Chromatograms of an extract from hemp flower flour, @ 225 nm (A),
306 nm (B).
30. 30 www.mn-net.com
Determination of cannabinoids in hemp products
500
400
300
200
100
0
-150
12
10
8
6
4
2
0
-2
0 1 2 3 4 5 6 7
Time [min]
0 1 2 3 4 5 6 7
Time [min]
CBD-2.967
CBN-3.592
THC-4.000
THCA-4.417
CBDA-2.608CBDA-2.608
THCA-4.425
Absorbance[mAU]Absorbance[mAU]
A
B
Figure 4:Chromatograms of an extract from hemp flower buds, @ 225 nm (A),
306 nm (B).
300
200
100
0
-100
20
15
10
5
0
-2
0 1 2 3 4 5 6 7
Time [min]
0 1 2 3 4 5 6 7
Time [min]
CBG-4.300
CBDA-4.433
CBC-5.500
THC-5.183
THCA-6.000
CBDA-4.433
Absorbance[mAU]Absorbance[mAU]
A
B
Figure 5: Chromatograms of an extract from hemp oil, @ 225 nm (A), 306 nm
(B).
700
500
375
250
125
0
-100
18
15
10
5
0
-2
0 1 2 3 4 5 6 7
Time [min]
0 1 2 3 4 5 6 7
Time [min]
CBG-4.300
CBC-5.500
CBGA-4.742
CBDA-4.433CBDA-4.433
Absorbance[mAU]Absorbance[mAU]
A
B
Figure 6:Chromatograms of an extract from hemp CO extract, @ 225 nm (A),2
306 nm (B).
Figure 10: Hemp flower buds, hemp flour and hemp tea (from left to right).
31. 31www.mn-net.com
Determination of cannabinoids in hemp products
MS/MS identification of cannabinoids
Figure 8: Chromatogram of an extract from hemp flower tea (positive polarity).
Figure 9: Chromatogram of an extract from hemp flower tea (negative polarity).
Calibration curves of CBD, CBDA, THC
20
15
10
5
0
-5
45
40
35
30
25
20
15
10
5
0
-5
-10
20
15
10
5
0
-5
0 20 40 60 80 100 120
Concentration [µg/mL]
0 20 40 60 80 100 120
Concentration [µg/mL]
0 20 40 60 80 100 120
Concentration [µg/mL]
y = 0.1797x + 0.0808
R = 0.99972
THC
y = 0.4058x + 0.2016
R = 0.99992
CBDA
y = 0.1851x + 0.2577
R = 0.99942
CBD
Area[mAU]Area[mAU]Area[mAU]
Figure 10: Calibration curves of Cannabidiol, Cannabidiolic acid,
Δ⁹-tetrahydrocannabinol.
Figure 7: Hemp oil and CO₂ extract.
32. 32 www.mn-net.com
Determination of cannabinoids in hemp products
Solid phase extraction for processed hemp
products
Sample extract of hemp products was diluted 1:1 with water.
Column: CHROMABOND HR-X, 85 µm,
6 mL/200 mg (REF 730938)
®
Conditioning: mL methanol, 5 mL 50 % methanol in
water
5
Sample appl.: 20 mL sample mixture with a flow rate of
3 mL/min
Washing: 5 mL of 50 % methanol in water with a flow
rate of 3 mL/min
Drying: 2 min with vacuum
Elution: 5 mL methanol
Eluent exchange: Evaporate eluate to dryness at 40°C under
a stream of nitrogen and fill up to 1.0 mL
with methanol.
140
120
100
80
60
40
20
0
10 20 30 40 50
Organic solvent content in sample [%]
CBDA THCA
Recoveryrate[%]
Figure 12: Recovery rates of CBD and THC, detection @ 225 nm.
140
120
100
80
60
40
20
0
10 20 30 40 50
Organic solvent content in sample [%]
THC CBG
Recoveryrate[%]
Figure 13: Recovery rates of CBDA and THCA, detection @ 306 nm.
Representative chromatograms for hemp prod-
ucts spiked with Cannabis sativa
250
200
100
0
-100
-150
30
25
20
15
100
5
0
-5
45
30
20
10
0
-5
140
120
100
80
60
40
20
0
-10
350
200
100
0
-100
-150
1000
800
600
400
200
0
-200
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6 7
Absorbance[mAU]
min min
Absorbance[mAU]Absorbance[mAU]
Absorbance[mAU]Absorbance[mAU]Absorbance[mAU]
Figure 14:Chromatograms of extracts with a mixture of hemp flower tea and
Cannabis sativa, spiking level A 1 %, spiking level B 2.5 %, spiking
level C 10 %.
400
300
200
100
0
-150
35
30
20
10
0
-5
45
30
20
10
0
-5
120
100
80
60
40
20
0
-10
400
300
200
100
0
-150
800
600
400
200
0
-200
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6 7
Absorbance[mAU]
Absorbance[mAU]Absorbance[mAU]Absorbance[mAU]
min
Absorbance[mAU]Absorbance[mAU]
min
Figure 15:Chromatograms of extracts with a mixture of hemp flower flour and
Cannabis sativa, spiking level A 1 %, spiking level B 2.5 %, spiking
level C 10 %.
500
400
300
200
100
0
-150
500
20
15
10
5
0
-2
35
30
20
10
0
-5
120
100
80
60
40
20
0
-10
400
300
200
100
0
-150
800
600
400
200
0
-200
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
min
7
0 1 2 3 4 5 6
min
7
Absorbance[mAU]Absorbance[mAU]Absorbance[mAU]
Absorbance[mAU]Absorbance[mAU]Absorbance[mAU]
min
Figure 16: Chromatograms of extracts with a mixture of hemp flower buds and
Cannabis sativa, spiking level A 1 %, spiking level B 2.5 %, spiking
level C 10 %.
33. 33www.mn-net.com
Determination of cannabinoids in hemp products
Conclusion
This application note shows a simple chromatographic separation
of the major cannabinoids from several hemp product samples
in less than ten minutes, that can be used for identification and
quantification of small analyte amounts. This work presents an ef-
fective extraction method and achieves the goal to develop a SPE
method for the enrichment of cannabinoids from difficult sample
matrices with high recovery rates. The figures 10 and 11 elucidate
that the organic content of the sample mixture plays an important
role to get good results for cannabinoid enrichment. The addition
of Cannabis sativa in hemp flower products is shown in the fig-
ures 12, 13 and 14.
In addition, the identification of cannabinoids by mass spectrom-
etry was successfully performed with presented chromatographic
conditions on a NUCLEOSHELL RP 18 column.®
References
[1] Drug policy of Germany.
[2] DAC/NRF 2016/1, C-053, Cannabisblüten (Cannabis flos).
34. 34 www.mn-net.com
Determination of THC in human urine with LC-MS
Determination of cannabinoids (THC) in human
urine with LC-MS
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen
Abstract
This application note describes the determination of THC and its
metabolites (THC–OH and THC–COOH) from urine in the lower
ng/mL range using manual solid phase extraction or the LCTech
FreeStyle™ liquid handling system. Since the target analytes are
secreted as glucuronide conjugates in human urine, it is neces-
sary to cleave the glucuronides prior to solid phase extraction.
This is done by basic hydrolysis. The pretreated sample solution
is then subjected to a solid phase extraction (SPE) step and finally
analyzed by HPLC.
Introduction
Cannabis, also known as Marihuana or Hashish, is the most
widely consumed drug in the world. Its consumption leads to
mood-altering behavior like euphoria, relaxation and altered-time
perception. A routinely consumption can lead to dependence and
tolerance [1,2]. In recent years there is also an increasing interest
in therapeutic effects of cannabinoids and the development of
potential cannabinoid medications. Therefore it is investigated for
treatment of chronic pain, muscle spasticity, nausea and AIDS
wasting disease, for instance [1,3,4]. This also leads to an increa-
sing demand for the development of accurate and sensitive ana-
lytical methods for the quantification of cannabinoids in biological
fluids [1]. The measurement of urine cannabinoids is necessary
for pharmacokinetic studies, drug treatment, workplace drug
testing and for drug impaired driving investigations. Detailed urine
collection procedures with comprehensive chain-of-custody do-
cumentation have been developed for forensic applications [1].
H C H
H3C O
3
OH
H
C5H11
R
Figure 1: Compound of interest.
Analyte R Formula Mass [g/mol]
THC CH3 C H ₀O21 3 2 314.5
THC–OH CH OH2 C ₁H ₀O2 3 3 330.5
THC–COOH COOH C ₁H ₈O2 2 4 344.4
Table 1: Overview of the analytes.
Sample pretreatment – alkaline hydrolysis
5 mL urine are spiked with a) 50 μL standard solution and b)
100 μL standard solution resulting in samples with a) 50 ng
each of THC, THC–OH and THC–COOH and b) 100 ng each
of the respective standards. The glucuronide is hydrolyzed by
treating 5 mL of the spiked urine (a) c = 10 ng/mL b) c = 20 ng/
mL) with 300 μL NaOH solution (10 mol/L) at 60 °C for 15 min
in a heating block. The hydrolyzed solution is cooled and mixed
with 200 μL glacial acetic acid. Then 2 mL ammonium acetate
solution (50 mmol/L) are added and the mixture is adjusted to pH
6–7 with either acetic acid or diluted NaOH solution. The sample
is transferred into a vial N 18. The hydrolysis tube is rinsed with
3 mL methanol which are combined with the sample solution.
Solid phase extraction (manual procedure)
(All steps with a flow of 1–2 mL / min)
Column type:
CHROMABOND HR-X polypropylene columns (85 μm), 3 mL,
200 mg, (REF 730931)
®
Conditioning:
2 mL methanol, 2 mL water, 2 mL ammonium acetate buffer
(50 mmol/L)
Sample application:
with a flow of 1–2 mL/min
Washing:
5 mL water – methanol (7:3, v/v), then drying for 10 min
Elution:
3 mL hexane – ethyl acetate – glacial acetic acid (75:25:1, v/v/v)
35. 35www.mn-net.com
Determination of THC in human urine with LC-MS
Automated solid phase extraction (LCTech FreeStyle™ SPE module)
Step Volume Dispensing speed Waiting time after dosage Dispense into
Conditioning with methanol 2 mL 2 mL/min 10 s waste
with water 2 mL 2 mL/min 10 s waste
with ammonium acetate buffer (50 mmol/L) 2 mL 2 mL/min 10 s waste
Load quantitative transfer over sample loop
from vial type 1@16 mL
12 mL 1 mL/min 25 s
rinse vial 3 times with water – methanol (7:3, v/v)
tube rinse volume: 1 mL
1 mL 0.3 mL/min waste
Washing water – methanol (7:3, v/v) 5 mL 2 mL/min 35 s waste
Drying with nitrogen (120 s) waste
Elution hexane – ethyl acetate – glacial acetic acid
(75:25:1, v/v/v)
3 mL 5 mL/min 15 s vial type
1@4 mL
Drying with air 20 mL 100 mL/min
Table 2: Automated procedure for solid phase extraction with LCTech Freestyle™ SPE module.
Eluent exchange:
Eluent exchange is performed manually. Eluates from the SPE
are evaporated to dryness at 40 °C under a stream of nitrogen
and then redissolved in an organic solvent suited for the
subsequent analysis. For HPLC-MS/MS 1 mL methanol is used.
Subsequent analysis: HPLC-MS/MS
Chromatographic conditions
Column:
EC 50/2 NUCLEOSHELL RP 18, 2.7 μm, (REF 763132.20)®
Eluent A:
water (ultrapure) + 0.1 % formic acid
Eluent B:
acetonitrile + 0.1 % formic acid
Gradient:
50–100 % B in 2.5 min, 100 % B for 2.5 min, 100–50 % B in
0.1 min, 50 % B for 2.4 min
Flow rate:
0.3 mL/min
Temperature:
40 °C
Injection volume:
5 μL
MS conditions:
API 3200 (AB Sciex), ion source ESI, positive ionization mode,
curtain gas 20 psig, ion spray voltage 5500 V, temperature
550 °C, nebulizer gas 20 psig, turbo gas 20 psig, CAD 6.0 psig
MRM transitions
Analyte [M+H]+
Q (Quantifier)1 Q (Qualifier)2
THC 315.2 193.2 123.1
THC–OH 331.2 313.3 43.1
THC–COOH 345.2 327.3 299.4
Table 3: MRM transitions for the analysis of THC and THC derivates.
Chromatograms
0
0 1 2 3 4 5 6 7 min
2000
1000
Intensity[cps]Intensity[cps]Intensity[cps]
1000
500
0
0 1 2 3 4 5 6 7
500
0
0 1 2 3 4 5 6 7
min
min
THCQ1
THCQ2
3.83 min
2.54 min
THC-COOHQ1
THC-COOHQ2
2.51 min
THC-OHQ1 THC-OHQ2
Figure 2: Chromatograms of HPLC-MS/MS analysis.
36. 36 www.mn-net.com
Determination of THC in human urine with LC-MS
Calibration curves
THC
THC–COOH
THC–OH
5 10 15 20
40000
30000
20000
10000
Concentration [ng/mL] in urine
Intensity[cps]
Figure 3: Calibration curves of THC and THC-derivates in urine matrix.
Recovery rates
Analyte Recovery rate [in %]
Manual SPE
THC 80 ± 3
THC–OH 77 ± 10
THC–COOH 98 ± 8
Automated SPE (LCTech FreeStyle™)
THC 90 ± 9
THC–OH 80 ± 6
THC–COOH 93 ± 8
Table 4: Recovery rates for the manual and automated SPE methods (average
from triple determination).
LOD/LOQ
THC THC–OH THC–COOH
LOD (ng/mL urine) 0.12 0.75 0.33
LOQ (ng/mL urine) 0.17 1.29 0.75
Table 5: Limit of quantification (LOQ) and limit of detection (LOD), the concen-
tration that provides a signal-to-noise ratio (S/N) of > 3 was consid-
ered as LOD and S/N > 10 was considered as LOQ.
Conclusion
Using the automated FreeStyle™ SPE sample preparation system
in combination with CHROMABOND HR-X columns and a sub-
sequent LC-MS analysis using NUCLEOSHELL RP 18 showed
reliable results for the analysis of THC and its metabolites from
human urine. Using the automated system even better recovery
rates were found than using a manual SPE method.
®
®
References
1. Huestis, M.A. Simultaneous GC-EI-MS Determination of Δ⁹-Te-
trahydrocannabinol, 11-Hydroxy-Δ⁹-Tetrahydrocannabinol in
Human Urine Following Tandem Enzyme-Alkaline Hydrolysis,
J. Anal. Toxicol. 31 (8): 477–485 (2007).
2. Gorelick, D. A., Heishman, S. J., Methods in Molecular Medi-
cine: Marijuana and Cannabinoid Research, Humana Press:
235–253 (2005).
3. Guy, G. W., Whittle, B. A., Robson, P. J., The Medicinal Uses
of Cannabis and Cannabinoids, Pharmaceutical press (2004).
4. Blake, D. R., Robson, P., Ho, M., Jubb, R. W. McCabe, C. S.,
Preliminary assessment of the efficiacy, tolerability and safety
of a cannabis-based medicine in the treatment of pain caused
by rheumatoid arthritis, Rheumatology, 45 (1): 50–52 (2006).
Additional information
The following applications regarding “The Determination of THC
in human urine” and further applications can be found on our on-
line application database at https://ChromaAppDB.mn-net.com
SPE (manual procedure): MN Appl. No. 305990
SPE (automated procedure): MN Appl. No. 306000
HPLC: MN Appl. No. 127380
Acknowledgment
We thank the company LCTech GmbH for the cooperation and
for providing the robotic system, called FreeStyle SPE module.®
37. 37www.mn-net.com
Cannabis testing
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38. 38 www.mn-net.com
Determination of THC in human urine with GC-MS
Determination of cannabinoids (THC) in urine
samples with GC-MS
MACHEREY-NAGEL application department · Dr. H. R. Wollseifen, A. Mengus-Kaya, T. Kretschmer
Abstract
This application describes the determination of cannabinoids
from urine matrix, prior to GC-MS analysis.
Introduction
There is an increasing interest in the determination of cannabi-
noids from different matrices like urine, hair and blood for phar-
macokinetic studies, drug treatment, workplace drug testing,
drug impaired driving investigations, and for evaluating the time of
cannabis use. Fast and sensitive procedures capable of quanti-
fying THC and its metabolites are necessary for all this application
fields.
Delta-9-tetrahydrocannabinol (THC) is the major psychoactive com-
ponent of marijuana and it will be quickly metabolized to hydroxy-
lated and carboxylated forms (THC-OH, THC-COOH) after con-
sumption [1]. THC, THC-OH and THC-COOH are conjugated
to glucuronide conjugates in human body to enhance water
solubility facilitating urinary excretion [2]. Total urine cannabinoid
conjugates can only be quantified by gas chromatography–mass
spectrometry (GC-MS) methods after hydrolysis prior to ex-
traction of urine sample. After a liquid-liquid extraction procedure
of hydrolyzed urine sample the extract was concentrated and
derivatized with MSTFA [3].
Using deuterated internal standards by GC-MS facilitates the
identification and quantitation of the focused analytes in sample
extracts.
Analyte R Formula M [g/mol]
THC CH3 C ₁H O2 30 2 314.5
THC-OH CH OH2 C ₁H O2 30 3 330.5
THC-COOH COOH C ₁H O2 28 4 344.4
Table 6: Compounds of interest.
Sample pretreatment
n Homogenize urine sample by stirring
n Fill 1 mL sample into a safe-lock tube (2 mL)
n Add standard solution, internal standard solution like described
in table 2
n Add 50 µL of β-glucuronidase solution (β = 2500 units/mL) and
125 µL phosphate buffer with pH 6.8
n Shake mixture and incubate in a shaking bath at 37 °C over
night (shaking speed 2000)
n Cool down samples at room temperature
n Add 125 µL sodium hydroxide solution (0.5 N) and 500 µL of a
mixture (ethyl acetate – n-hexane (9+1, v+v))
n Shake vigorously for 30 sec
n Centrifuge at room temperature at 13400 rpm for 10 min
n Take up organic phase for derivatization in a vial
n Add 125 µL acetic acid (99 %) and 500 µL of a mixture (ethyl
acetate – n-hexane (9+1, v+v)) to aqueous phase
n Shake vigorously for 30 min
n Centrifuge at room temperature at 13400 rpm for 10 min
n Add organic phase to the organic phase of first extraction
procedure
n Concentrate organic phase at 40 °C under nitrogen stream to
dryness
n Add 50 µL ethyl acetate and 50 µL MSTFA (REF 701270.201)
n Shake vigorously for 30 sec and incubate mixture at 80 °C for
30 min
n Take sample solution for GC-MS analysis
Spike level
[ng/mL]
Volume internal standard
mixture [µL]
Volume standard mixture
[µL]
0 50 0 (β = 1 µg/mL)
25 50 50 (β = 1 µg/mL)
50 50 100 (β = 1 µg/mL)
100 50 40 (β = 5 µg/mL)
150 50 60 (β = 5 µg/mL)
200 50 80 (β = 5 µg/mL)
250 50 100 (β = 5 µg/mL)
Table 7: Pipette scheme for sample pretreatment.
39. 39www.mn-net.com
Determination of THC in human urine with GC-MS
Subsequent analysis: GC-MS
Chromatographic conditions
Column:
Optima 5 HT, 0.25 µm, 30 m, 0.25 mm ID (REF 726106.30)®
Injection volume:
1 µL
Injection Mode:
Splitless
Injection Temperature:
250 °C
Carrier Gas:
Helium
Column Flow:
1.31 mL/min
Oven Programm:
70 °C [2 min] [20 °C/min] 250 °C [4 min] [20 °C/min]
300 °C [17 min]
MS conditions:
GCMS-QP2010plus, Shimadzu, ion source EI, scan type SIM
Tune:
Autotune
Ion Source temperature:
200 °C
Interface temperature:
250 °C
Solvent delay:
4 min
Analyt Retention
time [min]
M/Z Registered
in SIM mode
Tetrahydrocannabinol (THC) 13.465 303, 371, 386
Hydroxy Tetrahydrocannabinol (THC-OH) 16.055 371, 459, 474
Carboxy Tetrahydrocannabinol
(THC-COOH)
17.180 371, 473, 488
D -Tetrahydrocannabinol (THC-D₃)3 13.440 306, 374, 389
D -Hydroxy Tetrahydrocannabinol
(THC-OH-D₃)
3 16.030 374, 462, 477
D -Carboxy Tetrahydrocannabinol
(THC-COOH-D₃)
3 17.160 374, 476, 491
Table 8: M/Z Registered in SIM mode for cannabinoids.
Chromatograms
4000
3500
3000
2500
2000
1500
1000
500
0
12.0 13.0 14.0 min
Intensity[cps]
THC
Figure 5: Chromatograms of THC and THC-D₃ from standard solution (β = 100
ng/mL).
7000
6000
5000
4000
3000
2000
1000
0
14.5 15.0 15.5 16.0 16.5 min
Intensity[cps]
THC-OH
Figure 6: Chromatograms of THC-OH and THC-OH-D₃ from standard solution
(β = 100 ng/mL).
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
17.0 17.5 18.0 18.5 min
Intensity[cps]
THC-COOH
Figure 7: Chromatograms of THC-COOH and THC-COOH-D₃ from standard
solution (β = 100 ng/mL).
40. 40 www.mn-net.com
Determination of THC in human urine with GC-MS
Chromatograms (cont.)
15000
10000
5000
0
12.0 12.5 13.0 13.5 14.0 min
Intensity[cps]
THC
Figure 8: Chromatograms of THC and THC-D₃ from spiked urine sample
(β = 150 ng/mL).
12000
10000
5000
0
14.5 15.0 15.5 16.0 16.5 min
Intensity[cps]
THC-OH
Figure 9: Chromatograms of THC-OH and THC-OH-D₃ from spiked urine sam-
ple (β = 150 ng/mL).
11000
10000
5000
0
17.0 17.5 18.0 18.5 min
Intensity[cps]
THC-COOH
Figure 10: Chromatograms of THC-COOH and THC-COOH-D₃ from spiked
urine sample (β = 150 ng/mL).
Calibration curves
0 50 100 150 200 250 300
Concentration [ng/mL]
30000
25000
20000
15000
10000
5000
0
Intensity[cps]
R = 0.99912
THC
THC-OH
THC-COOH
R = 0.99822
R = 0.99692
Figure 11: Calibration curves for cannabinoids in concentration range between
25 ng/mL and 250 µg/mL with an excellent coefficient of determina-
tion from standard solutions.
0 50 100 150 200 250 300
Concentration [ng/mL]
35000
30000
25000
20000
15000
10000
5000
0
R = 0.99782
THC
THC-OH
THC-COOH R2 = 0.9967
R = 0.99712
Intensity[cps]
Figure 12: Calibration curves for cannabinoids in concentration range between
25 ng/mL and 250 µg/mL with an excellent coefficient of determina-
tion from urine samples.
Conclusion
This application note shows that the determination of canna-
binoids from urine samples could be carried out successfully
with all the tested products. The calibration curve from standard
solution and urine samples indicate good linearity with excellent
correlation coefficients. Sample preparation and derivatization
procedure were simple and efficient for the determination of THC
and its metabolites from urine sample matrix. By using a MS de-
tector with higher sensitivity or a solid phase extraction method,
it would be possible to determine cannabinoids from urine in
lower concentration levels. In summary the presented application
describes a quick and convenient method for the determination
of cannabinoids from urine with a simple and efficient sample
preparation procedure.
References
1. Constituents of Cannabis sativa. Georg Thieme Verlag Stutt-
gart · New York.
2. F. Grotenhermen, Journal of Cannabis Therapeutics, Vol. 3(1)
2003, Clinical Pharmacokinetics of Cannabinoids.
3. T. Nadulski, F. Sporkert, M. Schnelle, A.M.l Stadelmann, P.
Roser, T. Schefter, F. Pragst, Journal of Analytical Toxicology,
Volume 29, Issue 8, 1 November 2005, Pages 782–789.
41. 41www.mn-net.com
Determination of THC in human urine with GC-MS
Additional information
The following application regarding “Determination of canna-
binoids (THC) in urine samples with GC-MS” and further ap-
plications can be found on our online application database at
https://ChromaAppDB.mn-net.com
GC: MN Appl. No. 215340