The fundamentals of elemental analysis pertaining to plant materials will be elucidated. The lecture will delve into the intricacies of the sampling process, sample pre-treatment, and the preparation of plant material samples for subsequent analysis via ICP.
This lecture is based on previously read lecture "Plant Mineral Analysis", 2012. Some new points were added, especially in LOD/LOQ section. The internal standard calculation was explained. The lecture was presented in the frame of International Course "Crop Production under Saline Stress As A Result Of Climatic Changes", The Faculty of Agriculture, The Hebrew University of Jerusalem.
Near and mid-infrared spectroscopic determination of algal compositionzhenhua82
The objective of this study was to evaluate whether near-infrared reflectance spectroscopy (NIRS) or mid-infrared reflectance spectroscopy (MIRS) could be used to determine the composition of algal turf scrubber samples. We assayed a set of algal turf scrubber (ATS) samples (n = 117) by NIRS, MIRS, and conventional means for ash, total sugar, mono-sugar, total N, and P content. A subset of these samples (n = 64) were assayed by conventional means, MIRS, and NIRS for total lipid and total fatty acid content. We developed calibrations using all the samples and a one-out cross-validation procedure under partial least-squares regression. This process was repeated using 75% of randomly selected samples to develop the calibration and the remaining samples as an independent test set. Results using the entire sample set demonstrated that NIRS and MIRS can accurately determine ash (r (2) = 0.994 and 0.995, respectively) and total N (r (2) = 0.787 and 0.820, respectively) content, but not phosphorus, total sugar, or mono-sugar content in ATS samples. Results using the 64 sample subset indicated that neither NIRS nor MIRS can accurately determine lipid or total fatty acid content in ATS samples.
This lecture is based on previously read lecture "Plant Mineral Analysis", 2012. Some new points were added, especially in LOD/LOQ section. The internal standard calculation was explained. The lecture was presented in the frame of International Course "Crop Production under Saline Stress As A Result Of Climatic Changes", The Faculty of Agriculture, The Hebrew University of Jerusalem.
Near and mid-infrared spectroscopic determination of algal compositionzhenhua82
The objective of this study was to evaluate whether near-infrared reflectance spectroscopy (NIRS) or mid-infrared reflectance spectroscopy (MIRS) could be used to determine the composition of algal turf scrubber samples. We assayed a set of algal turf scrubber (ATS) samples (n = 117) by NIRS, MIRS, and conventional means for ash, total sugar, mono-sugar, total N, and P content. A subset of these samples (n = 64) were assayed by conventional means, MIRS, and NIRS for total lipid and total fatty acid content. We developed calibrations using all the samples and a one-out cross-validation procedure under partial least-squares regression. This process was repeated using 75% of randomly selected samples to develop the calibration and the remaining samples as an independent test set. Results using the entire sample set demonstrated that NIRS and MIRS can accurately determine ash (r (2) = 0.994 and 0.995, respectively) and total N (r (2) = 0.787 and 0.820, respectively) content, but not phosphorus, total sugar, or mono-sugar content in ATS samples. Results using the 64 sample subset indicated that neither NIRS nor MIRS can accurately determine lipid or total fatty acid content in ATS samples.
Many factors impacting the measurement precision of ICP-OES and ICP-MS are still often neglected for everyday operation, however. Sample preparation is one of the factors that play a crucial role in the success of high-quality sample analysis. In this webinar, our experts will discuss sample preparation to: 1) improve analysis precision 2) make difficult samples easy to be analyzed 3) eliminate sample dilution to minimize error introduction.
For more information, please visit here: http://chrom.ms/CtRtKpw
IQ Academy Lunch & Learn Webinar | Cost Effective Water Quality Monitoring wi...IQ_UK
Lots of water quality monitoring is undertaken by the quarrying industry as part of demonstrating environmental permit compliance to the Regulator as well as day to day operational control. Cost is a very important driver in monitoring design and implementation but must not be at the expense of quality and effectiveness. This webinar will discuss how to maximise the effectiveness of water quality monitoring whilst also minimising cost.
Delivered by Dr Craig Speed, an Associate Director and Hydrochemist in Wardell Armstrong’s Water team. Craig has over 13 years of water consultancy experience and 4 years’ experience working for the Environment Agency. His expertise includes design, management and review of water quality monitoring (both groundwater and surface water), hydrochemical interpretation, providing lectures on water quality monitoring at Birmingham University, knowledge of UK water legislation (including environmental permits and abstraction licensing) and detailed knowledge of the Water Framework Directive (WFD) including WFD Compliance Assessments.
His recent project experience includes historic metal mine impact assessments, a quarry lake hydrochemistry project, a quarry conceptual model review, hydrogeology lead in major infrastructure projects, key expert in groundwater monitoring for a project in Turkey and conducting an investigation and adjudication following lime stabilisation impacts on water quality for an electrical infrastructure company.
This topic includes a brief description of CDs, synthesis methods, factors influencing their properties, characterization tools, and recently used applications.
Here are the lecture notes from the presentation titled 'ICP-OES/MS Analysis: Advancements, Limitations, and Future Applications in Soil and Water Research,' delivered to a group of researchers affiliated with the Soil & Water Department, Faculty of Agriculture, Hebrew University of Jerusalem (Seagram Center) in 2023. The aim was to explore advanced technologies in elemental analysis and their application to soil and water research. The Lecture Notes Brochure (22 pages) can serve as a concise guide to ICP-OES/MS for researchers and students, assisting them in selecting the appropriate technique for their projects
In Israel, desalinated water is a major source of drinking water. Previous studies have suggested that
the levels of iodine in water provided by authorities may not accurately reflect the levels reaching end-users.
Materials and Methods: We analyzed 21 tap water samples collected from different localities across Israel, 13 posttreated
desalinated water samples from three of the largest Israeli desalination plants, and several natural water
samples. An improved method of ICP-MS developed in our laboratory was used to analyze the content of iodine
and other macro-elements, and determination of iodine was performed in alkaline media.
Results: Our results showed that it is possible to distinguish between sample groups based on iodine concentration,
water hardness, and Ca/Mg ratio. The median iodine concentrations for four groups of tap water samples
ranged from 0.3 to 12.3 μg/L, which is lower than the concentrations previously reported by other researchers in
Israel. Based on typical consumption, the water samples can provide no more than 3.39% of the recommended
dietary allowance level for iodine. The analysis of post-treated desalinated water samples indicated that these
waters comply with industrial specifications but contain only trace concentrations of iodine and much less
magnesium than recommended by different public health authorities for public consumption of drinking water.
Conclusion: The total iodine concentrations found were lower than several observations reported in previous
years in the literature. There are currently no strict regulations regarding iodine and magnesium levels in
drinking and/or softened (desalinated) water, but the intensive desalination plant application is already
exhibiting a negative impact on public health. Further investigations are needed, but the present study provides
useful insights for developing an effective policy to ensure adequate iodine supply for the population of Israel
through drinking water.
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Similar to Elemental Analysis of Plants using ICP-OES(2023)
Many factors impacting the measurement precision of ICP-OES and ICP-MS are still often neglected for everyday operation, however. Sample preparation is one of the factors that play a crucial role in the success of high-quality sample analysis. In this webinar, our experts will discuss sample preparation to: 1) improve analysis precision 2) make difficult samples easy to be analyzed 3) eliminate sample dilution to minimize error introduction.
For more information, please visit here: http://chrom.ms/CtRtKpw
IQ Academy Lunch & Learn Webinar | Cost Effective Water Quality Monitoring wi...IQ_UK
Lots of water quality monitoring is undertaken by the quarrying industry as part of demonstrating environmental permit compliance to the Regulator as well as day to day operational control. Cost is a very important driver in monitoring design and implementation but must not be at the expense of quality and effectiveness. This webinar will discuss how to maximise the effectiveness of water quality monitoring whilst also minimising cost.
Delivered by Dr Craig Speed, an Associate Director and Hydrochemist in Wardell Armstrong’s Water team. Craig has over 13 years of water consultancy experience and 4 years’ experience working for the Environment Agency. His expertise includes design, management and review of water quality monitoring (both groundwater and surface water), hydrochemical interpretation, providing lectures on water quality monitoring at Birmingham University, knowledge of UK water legislation (including environmental permits and abstraction licensing) and detailed knowledge of the Water Framework Directive (WFD) including WFD Compliance Assessments.
His recent project experience includes historic metal mine impact assessments, a quarry lake hydrochemistry project, a quarry conceptual model review, hydrogeology lead in major infrastructure projects, key expert in groundwater monitoring for a project in Turkey and conducting an investigation and adjudication following lime stabilisation impacts on water quality for an electrical infrastructure company.
This topic includes a brief description of CDs, synthesis methods, factors influencing their properties, characterization tools, and recently used applications.
Here are the lecture notes from the presentation titled 'ICP-OES/MS Analysis: Advancements, Limitations, and Future Applications in Soil and Water Research,' delivered to a group of researchers affiliated with the Soil & Water Department, Faculty of Agriculture, Hebrew University of Jerusalem (Seagram Center) in 2023. The aim was to explore advanced technologies in elemental analysis and their application to soil and water research. The Lecture Notes Brochure (22 pages) can serve as a concise guide to ICP-OES/MS for researchers and students, assisting them in selecting the appropriate technique for their projects
In Israel, desalinated water is a major source of drinking water. Previous studies have suggested that
the levels of iodine in water provided by authorities may not accurately reflect the levels reaching end-users.
Materials and Methods: We analyzed 21 tap water samples collected from different localities across Israel, 13 posttreated
desalinated water samples from three of the largest Israeli desalination plants, and several natural water
samples. An improved method of ICP-MS developed in our laboratory was used to analyze the content of iodine
and other macro-elements, and determination of iodine was performed in alkaline media.
Results: Our results showed that it is possible to distinguish between sample groups based on iodine concentration,
water hardness, and Ca/Mg ratio. The median iodine concentrations for four groups of tap water samples
ranged from 0.3 to 12.3 μg/L, which is lower than the concentrations previously reported by other researchers in
Israel. Based on typical consumption, the water samples can provide no more than 3.39% of the recommended
dietary allowance level for iodine. The analysis of post-treated desalinated water samples indicated that these
waters comply with industrial specifications but contain only trace concentrations of iodine and much less
magnesium than recommended by different public health authorities for public consumption of drinking water.
Conclusion: The total iodine concentrations found were lower than several observations reported in previous
years in the literature. There are currently no strict regulations regarding iodine and magnesium levels in
drinking and/or softened (desalinated) water, but the intensive desalination plant application is already
exhibiting a negative impact on public health. Further investigations are needed, but the present study provides
useful insights for developing an effective policy to ensure adequate iodine supply for the population of Israel
through drinking water.
Water desalination has been extensively developed in Israel, particularly in the last decade. The desalination
process provides fresh water that typically lacks minerals, and among these are ions that are essential to human
health and/or to agricultural production, such as Mg. We analyzed 28 tap water samples originating from different
cities across Israel to document their concentrations of Mg and other elements. The data from this survey
(summer 2016) were compared with the results of similar observations conducted in 2008. Regarding toxic
elements, tap water across Israel does not pose any health risk for consumers and may be used as drinking water
without any household pretreatment. This condition has not changed since 2008. However, the problem of Mg
deficiency due to the use of desalinated water was observed in about half of the sampling locations in 2016,
whereas no Mg deficiency had been detected in 2008. Moreover, household filtration of tap water prior to
consumption as drinking water may worsen the situation due to the Mg status resulting from rejection of this ion;
this could be harmful to the consumer, particularly under prolonged exposure.
A short lecture about Atomic Spectroscopy: Flame Photometry, Atomic Absorption, and Atomic Emission with Coupled Plasma (FP, AA and ICP-AES). Presented at 28.03.2011, Faculty of Agriculture, Hebrew University of Jerusalem, by Vasiliy Rosen, M.Sc.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
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The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
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Dues are only a small part of what it takes to show us you are committed. If we are to share in the Brotherhood’s honors and rewards, we must each have a stake. You will find the amount to be much less than what many private clubs charge but the benefits gained are much greater. You can benefit physically, spiritually, mentally and materially. Members can progress more in 30 days in the Brotherhood than they would in 10 years elsewhere How long will it take for me to become rich and powerful? royal eagles Brotherhood is about more than just wealth and power, as anyone who observes the often tragic lives of the rich and famous can attest to. Without true wisdom and inner power, the outer trappings of success are all in vain, for spirit is ascendant over matter. That which is eternal is of far greater value than that which turns to dust. royal eagles Brotherhood’s teachings are not aimed merely towards self-aggrandizement but for the greater happiness of the Member and so that they, in turn, may bless and help others upon the path of life.
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
1. Dr Vasiliy V. Rosen
vasiliyr@savion.huji.ac.il
The Plasma Spectrochemistry Laboratory
The Scientific Service Core Facility
The Faculty of Agriculture
The Hebrew University of Jerusalem
July 4, 2023
Elemental analysis of plant material by
ICP-OES/MS
3. Essential
Toxic
Major Micronutrients
Carbon (C)
Oxygen (O)
Hydrogen (H)
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Sodium (Na)
Silica (Si)
Calcium (Ca)
Magnesium (Mg)
Sulfur (S)
Boron (B),
Chlorine (Cl)
Copper (Cu)
Iron (Fe)
Manganese (Mn)
Molybdenum (Mo)
Zinc (Zn)
Nickel (Ni)
Cobalt (Co)
Chromium (Cr)
Selenium (Se)
Vanadium (V)
Silver (Ag)
Aluminum (Al)
Arsenic (As)
Barium (Ba)
Beryllium (Be)
Cadmium (Cd)
Mercury (Hg)
Lead (Pb)
Lithium (Li)
And all
micronutrients at
critical
concentration
The role of chemical elements in plants
(adopted from Munson R., 1997, and Macnicol R., 1984)
EA
ICP
4. The levels of major elements and micronutrients in mature
leaf tissue (after Munson R., 1997)
4
5. Sampling
Decontamination
Drying
Grinding
Non-representative sample
Remained surface pollutants
Loss of volatile compounds
and weight
Contamination by mill blades
(Fe, Ni, Cr, Mo…)
Procedure Danger
Storage
Contamination by wrong
package (Sn from can; B, Si,
etc – from Pyrex Glass)
Sample
naming
Complicated names lead to
human mistake
9. Closed digestion
Open digestion
Max. temperature 200 – 300 °C
Max. temperature limited by
solution boiling point
Low acid consumption
High acid consumption
Lower sample weight
Higher sample weight
No loss of volatile elements
Loss of volatile elements (Hg, I)
Risk of contamination from
digestion vessels
Risk of contamination from air and
cross-contamination
Digestion duration: 15-60 min
Digestion duration: 2 – 15 h (or
even more)
11. Cd, 1 mg/L, in weak acid
Cd, 1 mg/L, in base
Analyte concentrations are equal, but intensities are different
Matrices and Matrix Effect
12. Dry Ashing
The sample (0.5 g dry
wt.) digested at 500 °
C 4-6 h, then
dissolved in acid(s)
Advantages: cheap
method; sample
weight may be
increased.
Disadvantages: loss of
volatile elements (Cl, As,
Se, Mo, Hg); (cross)-
contamination; formation
of non-soluble silicates.
Wet Digestion
(Hot-Block)
The sample (0.5 g dry
wt.) digested with
acid(s) in glass or
Teflon tube on the
Hotplate or Digestion
block
Advantages: less loss
and contamination than
in Dry Ashing Method;
high throughput.
Disadvantages: some
acids are extremely
dangerous (HClO4, HF);
method is time-consuming.
Wet Digestion with
Microwave Oven
The sample (0.5 g dry wt.)
digested with acid(s) in closed
Teflon vessel in microwave
oven.
Advantages: No volatile
compounds lost (closed
digestion); contamination is
minimized; digestion conditions
are strong (temperature, acid
and pressure); digestion is quick
(about 30 min).
Disadvantages: expensive
equipment; the throughput is
usually low.
13. Introduction to ICP-OES/MS: Principles and Instrumentation
This is how AI thinks the ICP instrument looks like
14. ICP-OES
720/725, Agilent
USA
Arcos, Spectro,
Germany
Analytik Jena,
Germany
iCAP 7000 Plus,
Thermo Scientific
USA
Optima,
Perkin-Elmer, USA
ICPE 9800,
Shimadzu, Japan
Introduction to ICP-OES/MS: Principles and Instrumentation
This is what the ICP-OES really looks
17. Introduction to ICP-OES/MS: Principles and Instrumentation
This is how AI perceives the
appearance of the argon
plasma
This is what the
argon plasma really
looks like
18. Energy absorption
by ground-state
atoms
Atomic Absorption
(AA, GFAA)
Singly charged
ion formation
ICP-MS
Energy emission by
excited atoms and
ions
Adapted from Boss and Freeden, 1997
Flame photometry,
ICP-OES
Introduction to ICP-OES/MS: Principles and Instrumentation
sampling
disposal
argon
argon
argon
19. T, °C of the excitation source
Instrument LOQ
Low High
High Low
Introduction to ICP-OES/MS: Principles and Instrumentation
21. Introduction to ICP-OES/MS: Principles and Instrumentation
ICP-OES vs MS :
Adjustment
Ion Optics
Scan settings
Element selection
ICP-OES
22. ICP-OES: Cd 224 nm
LOQ 0.2 µg/L (ppb)
Introduction to ICP-OES/MS: Principles and Instrumentation
RSD = 3.91 %
RSD = 0.76 %
LOQ 0.0054
µg/L (ppb)
23. Fresh animal liver,
digested in HNO3
(0.5 g in 25 mL)
Introduction to ICP-OES/MS: Principles and Instrumentation
24. Method Advantages Method Limitations
❑ Multi-element ❑ Adjustment of measurement
conditions; Spectral
Interference
❑ High sensitivity = Low
LOQ
❑ Sample preparation
❑ Wide linear dynamic
range
❑ Matrix effect and Spectral
Interference
Introduction to ICP-OES/MS: Principles and Instrumentation
25. ❖ Objects: soil, plants, waters,
tissues, food, and drinks
❖ Nutrient analysis
❖ Trace elements analysis (including
toxic elements)
❖ Food authentication (geographical
origin through mineral profiling
and/or isotope ratio analysis)
❖ Speciation (HPLC+ICP-MS)
Introduction to ICP-OES/MS: Principles and Instrumentation
26. Brown seaweeds (Kombu and Wakame) display a greater capacity to accumulate total As and iodine than the red
seaweed (Nori)
Rosen, Shimshoni, et al, 2023 (unpublished)
Introduction to ICP-OES/MS: Principles and Instrumentation
27. Quality Control in ICP-OES/MS analysis
(after Munson R., 1997)
Ycps = a*Xmg/L+b
The slope is a measure of sensitivity:
how much the signal changes for a
change in concentration.
Ycps = a*Xmg/L+b
a
Ca K Cu Pb Cr
29. Accuracy is how close a
measured value is to the actual
(true) value.
Precision is how close the measured
values are to each other.
Quality Control in ICP-OES/MS analysis
LOQ is the lowest concentration at
which a measurement is quantitatively
meaningful (Mitra, 2003)
LOD is the concentration at
which we can decide whether an
element is present or not
(Thomsen, 2003)
30. Quality Control in ICP-OES/MS analysis
The combined uncertainty Uc in analytical
measurement is a single numerical value that
represents the total estimation of uncertainty,
taking into account various sources of error and
variability associated with the measurement process.
Uncertainty
Uexp = Uc*k, k is coverage factor
(appr. 2 for CI=95%)
31. Take home message
• Choose your spectrometry
technique/instrument based
on your research goals.
• Always remember the sample
pre-treatment and preparation
steps.
• Check the reliability of your
analysis