Presentation1
•Download as PPTX, PDF•
1 like•59 views
Atomic absorption spectroscopy involves using a hollow cathode lamp to emit light of a specific wavelength that is absorbed by atoms of the element being analyzed. The technique was developed in the 1950s and involves spraying a sample into a flame to atomize it. Neutral atoms in the flame absorb light from the lamp, and the amount of absorption is measured to determine the concentration of the element. The instrument consists of a light source, atomizer, monochromator, detector, and readout device. It can be used for both qualitative and quantitative analysis of many elements in various materials like biological fluids, foods, soils, and more.
Report
Share
Report
Share
Recommended
Atomic absorption spectroscopy pptx
Atomic absorption spectroscopy is a technique used to detect metals and metalloids in samples. It works by vaporizing the sample into atoms, then measuring the absorption of light from a hollow cathode lamp at a specific wavelength for each element. Key components of the instrument include a nebulizer to create an aerosol of the sample, a flame or graphite furnace atomizer to vaporize the sample, a monochromator to select the wavelength of light, and a detector to measure light absorption. Calibration curves are used to determine unknown concentrations by measuring the absorbance of standards with known concentrations. AAS is commonly used in environmental, food, and pharmaceutical analysis to detect metals.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique used to determine the concentration of chemical elements in a sample. It works by vaporizing the sample into atoms and measuring the absorption of light from a lamp at a specific wavelength for each element. The intensity of light absorbed is directly proportional to the concentration of the element. It can be used to analyze over 70 different elements in solutions or solids and has applications in fields like clinical analysis and pharmaceutical manufacturing.
APA seminar
Atomic absorption spectroscopy is a quantitative analytical technique used to determine the concentration of metallic elements in a sample. It works by measuring the absorption of light passing through atoms of the element of interest that have been atomized in a flame. The amount of light absorbed is directly proportional to the number of ground state atoms present, which allows the technique to be used for quantitative analysis. The instrument consists of a hollow cathode lamp, burner, monochromator, and photomultiplier tube to measure absorption. Applications include determining trace elements in biological samples and quantifying metals in foods, soils, and industrial samples.
Atomic absorption spectrophotometry
Atomic absorption spectrophotometry is an analytical technique used to determine the concentration of elemental impurities in solutions. It works by heating the sample in a flame or furnace to atomize it, then measuring the absorption of light from a hollow cathode lamp that emits wavelengths specific to the element of interest. The amount of light absorbed corresponds to the concentration of that element in the sample. It is a sensitive, high-throughput, and inexpensive method commonly used in fields like food/beverage testing, environmental analysis, and mining.
Aas presentation
Atomic absorption spectroscopy is a quantitative analytical technique used to determine the concentration of metals in solutions. It works by atomizing the sample using a flame and measuring the absorption of light from a lamp containing the element of interest. Each element absorbs light at a characteristic wavelength. A calibration curve of concentration versus absorbance is used to determine the concentration of an unknown sample. The technique only requires a small sample volume and can achieve parts-per-million sensitivity.
CHM260 - AAS (ii)
Flame emission spectrometry is a technique that measures the intensity of light emitted by excited atoms in a flame or plasma. It consists of a nebulizer, burner or plasma torch, monochromator, detector, and computer. Each element emits unique wavelengths when excited, allowing for qualitative and quantitative analysis by comparing emission intensities to standards. Inductively coupled plasma atomic emission spectrometry uses much higher plasma temperatures than flame techniques, resulting in lower detection limits and less interference.
Atomic Absorption Spectroscopy by Yousef Bahrami
Atomic absorption spectroscopy (AAS) is one of the important instrumental techniques for analysis of metallic and nonmetallic (mostly metalloids) elements in inorganic or organic materials.
Atomic emission spectroscopy
Recent Advances and Developments in Atomic Emission Spectroscopy
Atomic emission spectroscopy is used for elemental analysis and has advanced with the introduction of non-combustion plasma sources like inductively coupled plasma. It works by exciting sample atoms in a heat source, causing electron transitions that emit photons of element-specific wavelengths. Modern instruments detect these photons through optical systems and can analyze solids using laser or spark ablation followed by plasma excitation. Applications include analysis of metals in pharmaceuticals, soils, alloys, and biological or environmental samples. The document reviews excitation sources, sample introduction methods, optical and detection components, and applications across various fields.
Recommended
Atomic absorption spectroscopy pptx
Atomic absorption spectroscopy is a technique used to detect metals and metalloids in samples. It works by vaporizing the sample into atoms, then measuring the absorption of light from a hollow cathode lamp at a specific wavelength for each element. Key components of the instrument include a nebulizer to create an aerosol of the sample, a flame or graphite furnace atomizer to vaporize the sample, a monochromator to select the wavelength of light, and a detector to measure light absorption. Calibration curves are used to determine unknown concentrations by measuring the absorbance of standards with known concentrations. AAS is commonly used in environmental, food, and pharmaceutical analysis to detect metals.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique used to determine the concentration of chemical elements in a sample. It works by vaporizing the sample into atoms and measuring the absorption of light from a lamp at a specific wavelength for each element. The intensity of light absorbed is directly proportional to the concentration of the element. It can be used to analyze over 70 different elements in solutions or solids and has applications in fields like clinical analysis and pharmaceutical manufacturing.
APA seminar
Atomic absorption spectroscopy is a quantitative analytical technique used to determine the concentration of metallic elements in a sample. It works by measuring the absorption of light passing through atoms of the element of interest that have been atomized in a flame. The amount of light absorbed is directly proportional to the number of ground state atoms present, which allows the technique to be used for quantitative analysis. The instrument consists of a hollow cathode lamp, burner, monochromator, and photomultiplier tube to measure absorption. Applications include determining trace elements in biological samples and quantifying metals in foods, soils, and industrial samples.
Atomic absorption spectrophotometry
Atomic absorption spectrophotometry is an analytical technique used to determine the concentration of elemental impurities in solutions. It works by heating the sample in a flame or furnace to atomize it, then measuring the absorption of light from a hollow cathode lamp that emits wavelengths specific to the element of interest. The amount of light absorbed corresponds to the concentration of that element in the sample. It is a sensitive, high-throughput, and inexpensive method commonly used in fields like food/beverage testing, environmental analysis, and mining.
Aas presentation
Atomic absorption spectroscopy is a quantitative analytical technique used to determine the concentration of metals in solutions. It works by atomizing the sample using a flame and measuring the absorption of light from a lamp containing the element of interest. Each element absorbs light at a characteristic wavelength. A calibration curve of concentration versus absorbance is used to determine the concentration of an unknown sample. The technique only requires a small sample volume and can achieve parts-per-million sensitivity.
CHM260 - AAS (ii)
Flame emission spectrometry is a technique that measures the intensity of light emitted by excited atoms in a flame or plasma. It consists of a nebulizer, burner or plasma torch, monochromator, detector, and computer. Each element emits unique wavelengths when excited, allowing for qualitative and quantitative analysis by comparing emission intensities to standards. Inductively coupled plasma atomic emission spectrometry uses much higher plasma temperatures than flame techniques, resulting in lower detection limits and less interference.
Atomic Absorption Spectroscopy by Yousef Bahrami
Atomic absorption spectroscopy (AAS) is one of the important instrumental techniques for analysis of metallic and nonmetallic (mostly metalloids) elements in inorganic or organic materials.
Atomic emission spectroscopy
Recent Advances and Developments in Atomic Emission Spectroscopy
Atomic emission spectroscopy is used for elemental analysis and has advanced with the introduction of non-combustion plasma sources like inductively coupled plasma. It works by exciting sample atoms in a heat source, causing electron transitions that emit photons of element-specific wavelengths. Modern instruments detect these photons through optical systems and can analyze solids using laser or spark ablation followed by plasma excitation. Applications include analysis of metals in pharmaceuticals, soils, alloys, and biological or environmental samples. The document reviews excitation sources, sample introduction methods, optical and detection components, and applications across various fields.
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.Acmas Technologies Pvt. Ltd.
Atomic Absorption Spectrophotometer is for determining the concentration of a particular metal(element) in a sample. Atomic Absorption Spectrophotometer can be used to analyze the concentration of over 62 different metals. For More Information Please Logon http://goo.gl/1dTEGlAtomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to detect metals and metalloids in samples. It works by vaporizing the sample into atoms, and measuring the absorption of light from hollow cathode lamps at wavelengths specific to the element being analyzed. The instrument consists of a light source, atomizer, monochromator, and detector. Common atomizers include flame and graphite furnace atomizers. It can be used to quantitatively analyze over 60 elements at low concentrations in various materials like environmental samples, foods, and more. Interferences can occur from overlapping spectra or chemical interactions and must be addressed.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of metal ions in solutions. It works by vaporizing the sample into atoms and measuring how much light of a specific wavelength is absorbed. The amount of absorption is directly related to the concentration of the metal ion. Key components of the instrumentation include a radiation source, monochromator, atomizer, and detector. Common applications are analyzing metals in environmental, food, clinical, petroleum, and alloy samples.
7 atomic absorption spectroscopy
Atomic absorption spectroscopy determines the presence and concentration of metals like iron, copper, and calcium in liquid samples. It works by heating the sample in a flame or graphite furnace to excite the metal atoms. Each metal absorbs ultraviolet light at a characteristic wavelength according to quantum mechanics. The instrument measures the decrease in light intensity at that wavelength, which corresponds to the metal concentration through a calibration curve.
Atomic absorption spectroscopy
Atomic absorption spectrometry analyzes samples by breaking them down into atoms and measuring the absorption of light of a specific wavelength by those atoms. It works by vaporizing a sample in a flame and passing light from a hollow cathode lamp of the element being analyzed through the flame. The extent to which light is absorbed is proportional to the number of ground state atoms present and can be used to determine the elemental composition of a sample. Key components of an AAS instrument include the hollow cathode lamp light source, the flame atomizer and fuel system to vaporize samples, a monochromator to select the wavelength of light, and a photomultiplier detector to measure light absorption.
Atomic absorption spectroscopy
This document discusses atomic absorption spectroscopy (AAS). AAS involves using a light source to emit electromagnetic radiation that matches an element's characteristic wavelength. When the element's atoms absorb this radiation in their gaseous ground state, the intensity of the radiation decreases. By measuring this decrease, AAS can quantify the concentration of metals and some non-metals in liquid samples. The key components of an AAS instrument are the light source, atomizer, monochromator, and detector. The atomizer converts the sample into free atoms, while the monochromator selects the characteristic wavelength and the detector measures the absorbed intensity.
Atomic absorption spectrometry (aas)
Atomic absorption spectrometry (AAS) is a technique for determining the concentration of metal elements in solutions. It works by atomizing the sample using a flame or furnace and measuring the absorption of light from a hollow cathode lamp emitting light at the wavelength of the element of interest. The amount of light absorbed is directly proportional to the concentration of the element in the original sample. AAS can detect elements at low ppm concentrations and is used for applications like analyzing metals in foods, pharmaceuticals, and other materials after pretreatment like decomposition.
Atomic absorption spectrophotometry
Atomic absorption spectrophotometry is a technique for elemental analysis that was introduced in 1950. It uses the absorption of light to detect specific metal elements in liquid or biological samples. The technique works by vaporizing the metallic species in a flame and measuring the absorption of light at the characteristic wavelength of each metal atom. It provides sensitive detection of metals down to concentrations of 1 part per million or lower. The instrument uses a hollow cathode lamp, chopper, atomizer, monochromator, detector, and other components to selectively measure the absorption of light by the metal atoms.
Vip atomic absorption spectroscopy
Atomic absorption spectroscopy analyzes elements by heating samples to atomize elements and measuring light absorption. It can analyze water, foods, oils, soils, and blood. Elements are heated until atoms form, which absorb light from hollow cathode lamps at element-specific wavelengths. Flames or graphite furnaces are used to heat samples. Graphite furnace atomic absorption allows smaller sample sizes and higher sensitivity than flame atomic absorption. Interferences can occur but can be corrected. Atomic absorption spectroscopy can detect elements at the parts-per-million and parts-per-billion levels.
ATOMIC ABSORPTION SPECTROSCOPY
- Atomic absorption spectroscopy is a technique used to quantitatively determine trace metals in liquids. It works by vaporizing the liquid sample and measuring the absorption of light from hollow cathode lamps by atoms of the metal in the vapor.
- The amount of light absorbed is directly proportional to the number of metal atoms in the vapor. By measuring the absorption, the concentration of the metal in the original sample can be determined.
- Atomic absorption spectroscopy has detection limits in the parts-per-million or parts-per-billion range for many metals. It is a specific technique as each metal absorbs only its own characteristic wavelength.
Atomic spectroscopy (AAS & AES)
Atomic spectroscopy plays a major role as the basis of a wide range of analytical techniques that contribute data on elemental concentrations and isotope ratios .These analytical data provide the raw material on which progress in geochemistry depends.
The main advantages of AAS & AES are that it is relatively inexpensive and easy to use, while still offering high throughput, quantitative analysis of the metal content of solids or liquids. This makes it suitable for use in a wide range of applications.
Flame Atomic Absorption Spectroscopy
1. The document describes how to use flame atomic absorption spectroscopy to determine the concentration of calcium in bottled water samples.
2. Flame atomic absorption spectroscopy works by aspirating and atomizing liquid samples using a flame, then measuring the absorption of light at characteristic wavelengths to detect specific metals.
3. The technique requires samples to be aspirated and mixed with combustible gases and ignited in a flame between 2100-2800°C to atomize the metals, which will absorb light from a hollow cathode lamp at wavelengths specific to each metal.
atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique that measures the concentration of an element by detecting the amount of light absorbed by atoms of that element in the gaseous state. The document discusses the history, principle, instrumentation, interferences, calibration curve, and applications of atomic absorption spectroscopy. It also provides examples of experiments including determining vanadium in lubricating oil and lead in contaminated soil.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of chemical elements in solution or solid samples. It works by vaporizing the sample into free atoms that can absorb light at specific wavelengths. The amount of light absorbed is measured and used to determine the concentration of elements in the sample. It has been used since the 1950s and can analyze over 70 elements. It provides a simple and reliable way to quantify metals in applications like environmental monitoring, food testing, and pharmaceutical analysis.
Atomic absorption spectroscopy
Atomic absorption spectroscopy (AAS) is a technique used to determine the concentration of elements in a sample. It works by vaporizing the sample and passing it through a flame where it absorbs light from a lamp emitting a characteristic wavelength for the element. The amount of light absorbed is measured and corresponds to the concentration of the element in the original sample. AAS can be used to detect over 70 different elements and has applications in fields like pharmacology, toxicology, and food analysis. Modern AAS instruments have components like lamps, atomizers, monochromators, detectors, and readouts to precisely measure the light absorption of vaporized sample elements.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique that measures the concentration of elements by detecting the amount of light absorbed by atoms in the gaseous state at specific wavelengths. It works by vaporizing and atomizing samples using a flame or graphite furnace, then measuring the absorption of light from a hollow cathode lamp at characteristic wavelengths. The instrument consists of a light source, atomizer, monochromator, detector, and readout system. Calibration curves of concentration versus absorption are used to determine unknown concentrations in samples. Potential interferences can affect the analysis and must be minimized. Atomic absorption spectroscopy has various applications in fields like metallurgy, pharmaceutical analysis, and biochemical analysis.
Q canalytic aas2
Atomic absorption spectroscopy is an elemental analysis technique that involves dissolving metals in a sample, vaporizing them in a flame, and detecting the absorption of light from a hollow cathode lamp specific to the element. It can detect metals at concentrations of 1-100 parts per million. The sample is nebulized and aspirated into a flame, where atomic absorption of light from the element-specific lamp is measured with a photomultiplier tube detector. Standard addition analysis is used to account for matrix effects that can interfere with detection.
Flame Spectroscopy Analysis B.Pharma and M/Pharma
Flame photometry is a technique that uses the intensity of light emitted from an element in a flame to determine its concentration. Samples are nebulized and introduced into a flame where atoms are excited and emit light of characteristic wavelengths. A monochromator separates this light, which is detected and the intensity measured to quantify the elemental concentration. Sodium, potassium, lithium, and calcium are commonly analyzed using this technique in applications like serum analysis and soil testing.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of metals in solutions. It works by atomizing the sample and measuring the absorption of light from a hollow cathode lamp, which is characteristic of the metal of interest. There are two main types - flame atomic absorption which uses a flame to atomize the liquid sample, and graphite furnace atomic absorption which introduces a small solid or liquid sample directly into a graphite furnace for higher sensitivity. The technique can be used to analyze over 62 different metals at low detection limits.
Presentation1
This document discusses atomic absorption spectroscopy, including its history, principles, instrumentation, and applications. Atomic absorption spectroscopy is a technique used to determine the concentration of metal elements in samples. It works by measuring the absorption of light by vaporized ground-state metal atoms. The document outlines the key components of atomic absorption spectroscopy systems, including light sources, nebulizers, atomizers, and detectors. It also describes how the technique has been applied to areas like clinical analysis, environmental analysis, and mining.
ATOMIC ABSORPTION SPECTROSCOPY
The document discusses atomic absorption spectroscopy. It describes key events in the development of spectroscopy, including Newton's experiments with light dispersion in 1665 and Kirchoff and Bunsen's work establishing spectroscopy in 1859. The document also summarizes the basic principles of atomic absorption spectroscopy, the types of spectra, instrumentation involved, and sample preparation methods.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to detect metals and some non-metals in samples. It works by vaporizing the sample in a flame or furnace and measuring how much light of a specific wavelength is absorbed, which is proportional to the concentration of the metal in the sample. The sample is converted to free atoms that can then absorb light, and instruments consist of a light source, atomizer, monochromator, and detector to measure absorption and determine concentrations. It is a common method for trace metal analysis.
More Related Content
What's hot
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.Acmas Technologies Pvt. Ltd.
Atomic Absorption Spectrophotometer is for determining the concentration of a particular metal(element) in a sample. Atomic Absorption Spectrophotometer can be used to analyze the concentration of over 62 different metals. For More Information Please Logon http://goo.gl/1dTEGlAtomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to detect metals and metalloids in samples. It works by vaporizing the sample into atoms, and measuring the absorption of light from hollow cathode lamps at wavelengths specific to the element being analyzed. The instrument consists of a light source, atomizer, monochromator, and detector. Common atomizers include flame and graphite furnace atomizers. It can be used to quantitatively analyze over 60 elements at low concentrations in various materials like environmental samples, foods, and more. Interferences can occur from overlapping spectra or chemical interactions and must be addressed.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of metal ions in solutions. It works by vaporizing the sample into atoms and measuring how much light of a specific wavelength is absorbed. The amount of absorption is directly related to the concentration of the metal ion. Key components of the instrumentation include a radiation source, monochromator, atomizer, and detector. Common applications are analyzing metals in environmental, food, clinical, petroleum, and alloy samples.
7 atomic absorption spectroscopy
Atomic absorption spectroscopy determines the presence and concentration of metals like iron, copper, and calcium in liquid samples. It works by heating the sample in a flame or graphite furnace to excite the metal atoms. Each metal absorbs ultraviolet light at a characteristic wavelength according to quantum mechanics. The instrument measures the decrease in light intensity at that wavelength, which corresponds to the metal concentration through a calibration curve.
Atomic absorption spectroscopy
Atomic absorption spectrometry analyzes samples by breaking them down into atoms and measuring the absorption of light of a specific wavelength by those atoms. It works by vaporizing a sample in a flame and passing light from a hollow cathode lamp of the element being analyzed through the flame. The extent to which light is absorbed is proportional to the number of ground state atoms present and can be used to determine the elemental composition of a sample. Key components of an AAS instrument include the hollow cathode lamp light source, the flame atomizer and fuel system to vaporize samples, a monochromator to select the wavelength of light, and a photomultiplier detector to measure light absorption.
Atomic absorption spectroscopy
This document discusses atomic absorption spectroscopy (AAS). AAS involves using a light source to emit electromagnetic radiation that matches an element's characteristic wavelength. When the element's atoms absorb this radiation in their gaseous ground state, the intensity of the radiation decreases. By measuring this decrease, AAS can quantify the concentration of metals and some non-metals in liquid samples. The key components of an AAS instrument are the light source, atomizer, monochromator, and detector. The atomizer converts the sample into free atoms, while the monochromator selects the characteristic wavelength and the detector measures the absorbed intensity.
Atomic absorption spectrometry (aas)
Atomic absorption spectrometry (AAS) is a technique for determining the concentration of metal elements in solutions. It works by atomizing the sample using a flame or furnace and measuring the absorption of light from a hollow cathode lamp emitting light at the wavelength of the element of interest. The amount of light absorbed is directly proportional to the concentration of the element in the original sample. AAS can detect elements at low ppm concentrations and is used for applications like analyzing metals in foods, pharmaceuticals, and other materials after pretreatment like decomposition.
Atomic absorption spectrophotometry
Atomic absorption spectrophotometry is a technique for elemental analysis that was introduced in 1950. It uses the absorption of light to detect specific metal elements in liquid or biological samples. The technique works by vaporizing the metallic species in a flame and measuring the absorption of light at the characteristic wavelength of each metal atom. It provides sensitive detection of metals down to concentrations of 1 part per million or lower. The instrument uses a hollow cathode lamp, chopper, atomizer, monochromator, detector, and other components to selectively measure the absorption of light by the metal atoms.
Vip atomic absorption spectroscopy
Atomic absorption spectroscopy analyzes elements by heating samples to atomize elements and measuring light absorption. It can analyze water, foods, oils, soils, and blood. Elements are heated until atoms form, which absorb light from hollow cathode lamps at element-specific wavelengths. Flames or graphite furnaces are used to heat samples. Graphite furnace atomic absorption allows smaller sample sizes and higher sensitivity than flame atomic absorption. Interferences can occur but can be corrected. Atomic absorption spectroscopy can detect elements at the parts-per-million and parts-per-billion levels.
ATOMIC ABSORPTION SPECTROSCOPY
- Atomic absorption spectroscopy is a technique used to quantitatively determine trace metals in liquids. It works by vaporizing the liquid sample and measuring the absorption of light from hollow cathode lamps by atoms of the metal in the vapor.
- The amount of light absorbed is directly proportional to the number of metal atoms in the vapor. By measuring the absorption, the concentration of the metal in the original sample can be determined.
- Atomic absorption spectroscopy has detection limits in the parts-per-million or parts-per-billion range for many metals. It is a specific technique as each metal absorbs only its own characteristic wavelength.
Atomic spectroscopy (AAS & AES)
Atomic spectroscopy plays a major role as the basis of a wide range of analytical techniques that contribute data on elemental concentrations and isotope ratios .These analytical data provide the raw material on which progress in geochemistry depends.
The main advantages of AAS & AES are that it is relatively inexpensive and easy to use, while still offering high throughput, quantitative analysis of the metal content of solids or liquids. This makes it suitable for use in a wide range of applications.
Flame Atomic Absorption Spectroscopy
1. The document describes how to use flame atomic absorption spectroscopy to determine the concentration of calcium in bottled water samples.
2. Flame atomic absorption spectroscopy works by aspirating and atomizing liquid samples using a flame, then measuring the absorption of light at characteristic wavelengths to detect specific metals.
3. The technique requires samples to be aspirated and mixed with combustible gases and ignited in a flame between 2100-2800°C to atomize the metals, which will absorb light from a hollow cathode lamp at wavelengths specific to each metal.
atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique that measures the concentration of an element by detecting the amount of light absorbed by atoms of that element in the gaseous state. The document discusses the history, principle, instrumentation, interferences, calibration curve, and applications of atomic absorption spectroscopy. It also provides examples of experiments including determining vanadium in lubricating oil and lead in contaminated soil.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of chemical elements in solution or solid samples. It works by vaporizing the sample into free atoms that can absorb light at specific wavelengths. The amount of light absorbed is measured and used to determine the concentration of elements in the sample. It has been used since the 1950s and can analyze over 70 elements. It provides a simple and reliable way to quantify metals in applications like environmental monitoring, food testing, and pharmaceutical analysis.
Atomic absorption spectroscopy
Atomic absorption spectroscopy (AAS) is a technique used to determine the concentration of elements in a sample. It works by vaporizing the sample and passing it through a flame where it absorbs light from a lamp emitting a characteristic wavelength for the element. The amount of light absorbed is measured and corresponds to the concentration of the element in the original sample. AAS can be used to detect over 70 different elements and has applications in fields like pharmacology, toxicology, and food analysis. Modern AAS instruments have components like lamps, atomizers, monochromators, detectors, and readouts to precisely measure the light absorption of vaporized sample elements.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique that measures the concentration of elements by detecting the amount of light absorbed by atoms in the gaseous state at specific wavelengths. It works by vaporizing and atomizing samples using a flame or graphite furnace, then measuring the absorption of light from a hollow cathode lamp at characteristic wavelengths. The instrument consists of a light source, atomizer, monochromator, detector, and readout system. Calibration curves of concentration versus absorption are used to determine unknown concentrations in samples. Potential interferences can affect the analysis and must be minimized. Atomic absorption spectroscopy has various applications in fields like metallurgy, pharmaceutical analysis, and biochemical analysis.
Q canalytic aas2
Atomic absorption spectroscopy is an elemental analysis technique that involves dissolving metals in a sample, vaporizing them in a flame, and detecting the absorption of light from a hollow cathode lamp specific to the element. It can detect metals at concentrations of 1-100 parts per million. The sample is nebulized and aspirated into a flame, where atomic absorption of light from the element-specific lamp is measured with a photomultiplier tube detector. Standard addition analysis is used to account for matrix effects that can interfere with detection.
Flame Spectroscopy Analysis B.Pharma and M/Pharma
Flame photometry is a technique that uses the intensity of light emitted from an element in a flame to determine its concentration. Samples are nebulized and introduced into a flame where atoms are excited and emit light of characteristic wavelengths. A monochromator separates this light, which is detected and the intensity measured to quantify the elemental concentration. Sodium, potassium, lithium, and calcium are commonly analyzed using this technique in applications like serum analysis and soil testing.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to determine the concentration of metals in solutions. It works by atomizing the sample and measuring the absorption of light from a hollow cathode lamp, which is characteristic of the metal of interest. There are two main types - flame atomic absorption which uses a flame to atomize the liquid sample, and graphite furnace atomic absorption which introduces a small solid or liquid sample directly into a graphite furnace for higher sensitivity. The technique can be used to analyze over 62 different metals at low detection limits.
Presentation1
This document discusses atomic absorption spectroscopy, including its history, principles, instrumentation, and applications. Atomic absorption spectroscopy is a technique used to determine the concentration of metal elements in samples. It works by measuring the absorption of light by vaporized ground-state metal atoms. The document outlines the key components of atomic absorption spectroscopy systems, including light sources, nebulizers, atomizers, and detectors. It also describes how the technique has been applied to areas like clinical analysis, environmental analysis, and mining.
What's hot (20)
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.
Atomic Absorption Spectrophotometer (AAS) by ACMAS Technologies Pvt Ltd.
Similar to Presentation1
ATOMIC ABSORPTION SPECTROSCOPY
The document discusses atomic absorption spectroscopy. It describes key events in the development of spectroscopy, including Newton's experiments with light dispersion in 1665 and Kirchoff and Bunsen's work establishing spectroscopy in 1859. The document also summarizes the basic principles of atomic absorption spectroscopy, the types of spectra, instrumentation involved, and sample preparation methods.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is a technique used to detect metals and some non-metals in samples. It works by vaporizing the sample in a flame or furnace and measuring how much light of a specific wavelength is absorbed, which is proportional to the concentration of the metal in the sample. The sample is converted to free atoms that can then absorb light, and instruments consist of a light source, atomizer, monochromator, and detector to measure absorption and determine concentrations. It is a common method for trace metal analysis.
Atomic absorption spectroscopy lec
Atomic absorption spectroscopy is a technique used to detect metals and some non-metals in samples. It works by vaporizing the sample in a flame or graphite furnace and measuring the absorption of light at specific wavelengths that are characteristic of different elements. The amount of light absorbed can then be used to determine the concentration of those elements in the original sample. It is a common, reliable, and simple method that can analyze over 60 different elements at very low concentrations.
Atomic Absorption Spectroscopy (www.Redicals.com)
Atomic absorption spectroscopy involves atomizing a liquid sample and measuring the absorption of light from a lamp that emits light of a specific wavelength corresponding to the element being measured. The technique was introduced in 1955 and involves using a flame or graphite furnace to atomize the sample, a monochromator to select the wavelength of light, and a detector to measure the absorption. Common interferences include overlap of spectral lines, incomplete dissociation of compounds, and physical effects related to viscosity, solvent, and ionization. Atomic absorption spectroscopy is widely used for trace metal analysis in applications such as clinical analysis, environmental monitoring, pharmaceuticals, and mining.
Mridu- AAS.pptx
a brief discussion of AAS, an analytical technique use for heavy metal analysis. Atomic absorption spectroscopy is a quantitative method of analysis of any kind of sample; that is applicable to many metals
AAS can be used to determine over 70 different elements in solution, or directly in solid samples via electro thermal vaporization.
Atomic Absorption Spectroscopy is a very common technique for detecting metals and metalloids in samples.
It is very reliable and simple to use.
It also measures the concentration of metals in the sample.
Atomic Absorption Spectroscopy is an analytical technique that measures the concentration of an element by measuring the amount of light that is absorbed at a characteristic wavelength when it passes through cloud of atoms
As the number of atoms in the light path increases, the amount of light absorbed increases.
Applications: Presence of metals as an impurity or in alloys can be perform.
Level of metals could be detected in tissue samples like Aluminum in blood and Copper in brain tissues.
Due to wear and tear there are different sorts of metals which are given in the lubrication oils which could be determined for the analysis of conditions of machines.
Determination of elements in the agricultural samples.
Water sample analysis (e.g. Ca, Mg, Fe, Si, Al, Ba content).
Food sample analysis.
Analysis of animal feedstuffs (e.g. Mn, Fe, Cu, Cr, Se, Zn).
Analysis of additives in lubricating oils and greases (Ba, Ca, Na, Li, Zn, Mg). analysis of soils.
Clinical sample analysis (blood samples: whole blood, plasma, serum; Ca, Mg, Li, Na, K, Fe).
Analysis of Environmental samples such as- drinking water, ocean water, soil.
Pharmaceutical sample Analysis: Estimation of zinc in insulin preparation, calcium in calcium salt is done by using AAS. Principle: The sample, in solution, is aspirated as a spray into a chamber, where it is mixed with air and fuel.
This mixture passes through baffles, here large drops fall and are drained off. Only fine droplets reach the flame.
Light from the hollow-cathode lamp passes through the sample of ground-state atoms in the flame.
The amount of light absorbed is proportional to the concentration.
The element being determined must be reduced to the elemental state, vaporized, and imposed in the beam of the radiation in the source.
When a ground-state atom absorbs light energy, an excited atom is produced.
The excited atom then returns to the ground state, emitting light of the same energy as it absorbed.
The flame sample thus contains a dynamic population of ground-state and excited atoms, both absorbing and emitting radiant energy. The emitted energy from the flame will go in all directions, and it will be a steady emission.
Because the purpose of the instrument is to measure the amount of light absorbed, the light detector must be able to distinguish between the light beam emitted by the hollow cathode lamp and that emitted by excited atoms in the flame.
Atomic Absorption Spectroscopy (AAS)
Atomic absorption spectroscopy is a technique used to determine the concentration of metal elements in liquids. It works by vaporizing the metal elements in a flame and measuring how much light of a specific wavelength is absorbed. The amount of absorption is directly proportional to the concentration of the metal. Key aspects of atomic absorption spectroscopy include using a hollow cathode lamp or electrodeless discharge lamp as a radiation source, a flame or carbon atomizer to vaporize the sample, and a photomultiplier detector to measure light absorption. It is a sensitive technique that can detect metals down to the parts-per-million level.
Atomic absorption
Atomic absorption spectroscopy is an analytical technique used to determine the concentration of metal elements in solutions. It works by vaporizing the sample into atoms and measuring how much light of a specific wavelength is absorbed. The technique was largely developed in the 1950s and can analyze over 70 metal elements. It uses a light source, atomizer like a flame or graphite furnace to vaporize samples, monochromator, and detector. Flame atomic absorption is common but graphite furnace offers greater sensitivity for smaller sample sizes.
Aas
This document provides an introduction to atomic absorption spectroscopy. It discusses the basic principles, instrumentation, and applications of atomic absorption spectroscopy. The key points are:
- Atomic absorption spectroscopy involves measuring the absorption of light by vaporized ground-state atoms of an element.
- The basic components of an atomic absorption spectroscopy instrument are a radiation source, sample delivery system, monochromator, detector, and readout device.
- Applications include determining metallic components in biological materials, isotopic analysis, and forensic analysis of samples like blood, soil, and gunshot residue.
flame photometery
Flame photometry is a technique used to analyze sodium and potassium levels. It works by spraying a sample into a flame, which converts the atoms to excited states. As the atoms return to ground states, they emit light of characteristic wavelengths that can be measured. The intensity is used for quantitative analysis. A flame photometer uses a burner to create a flame, filters to select wavelengths, and a photomultiplier tube to detect light and convert it to electrical signals for analysis. Common applications include analyzing sodium, potassium, and calcium levels in body fluids and industrial samples.
Atomic absorption spectroscopy
This document provides an overview of atomic absorption spectroscopy (AAS). It describes that AAS involves using a hollow cathode lamp radiation source, a flame to atomize liquid samples, and a monochromator and detector to measure absorption of radiation by metal atoms. The document lists the typical components of an AAS system and explains the working mechanism where liquid samples are nebulized, enter the flame and form free atoms that can absorb radiation. Applications of AAS include analyzing metals in clinical, environmental, and industrial samples.
Atomic Absorption Spectrometer.pptx
Atomic absorption spectrometry is a technique used to determine the concentration of chemical elements in solution. It works by vaporizing the elements in a flame or graphite furnace and measuring how much light of a specific wavelength is absorbed, which indicates the concentration. Key components of an atomic absorption spectrometer include a light source, atomizer such as a flame or furnace, monochromator, detector, and display. Flame atomic absorption is used for higher concentrations while graphite furnace atomic absorption can detect trace levels. Potential interferences must also be considered and addressed.
Atomic absorption spectroscopy (AAS).pptx
Pharmaceuticals: In some pharmaceutical manufacturing processes, minute quantities of a catalyst used in the process (usually a metal) are sometimes present in the final product. By using AAS the amount of catalyst present can be determined.
Atomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) is a spectro analytical procedure for the quantitative determination of chemical elements by free atoms in the gaseous state.
Atomic absorption spectroscopy is based on absorption of light by free metallic ions.
In analytical chemistry the technique is used for determining the concentration of a particular element (the analyte) in a sample to be analyzed. AAS can be used to determine over 70 different elements in solution, or directly in solid samples via electrothermal vaporization
Atomic absorption spectrometry (AAS) is an analytical technique that measures the concentrations of elements.
Atomic absorption is so sensitive that it can measure down to parts per billion of a gram (µg dm–3 ) in a sample.
The technique makes use of the wavelengths of light specifically absorbed by an element. They correspond to the energies needed to promote electrons from one energy level to another, higher, energy level.
Atomic absorption spectrometry has many uses in different areas of chemistry.
Clinical analysis : Analysing metals in biological fluids such as blood and urine.
Environmental analysis: Monitoring our environment – eg finding out the levels of various elements in rivers, seawater, drinking water, air, petrol and drinks such as wine, beer and fruit drinks.
The technique makes use of the atomic absorption spectrum of a sample in order to assess the concentration of specific analytes within it. It requires standards with known analyte content to establish the relation between the measured absorbance and the analyte concentration and relies therefore on the [Beer–Lambert law].
The electrons within an atom exist at various energy levels. When the atom is exposed to its own unique wavelength, it can absorb the energy (photons) and electrons move from a ground state to excited states.
The radiant energy absorbed by the electrons is directly related to the transition that occurs during this process.
Furthermore, since the electronic structure of every element is unique, the radiation absorbed represents a unique property of each individual element and it can be measured.
An atomic absorption spectrometer uses these basic principles and applies them in practical quantitative analysis
A typical atomic absorption spectrometer consists of four main components:
Atomization
Light source,
Atomization system,
Monochromator &
Detection system
Atomization can be carried out either by a flame or furnace.
Heat energy is utilized in atomic absorption spectroscopy to convert metallic elements to atomic dissociated vapor.
The temperature should be controlled very carefully for the conversion of atomic vapor.
At too high temperatures, atoms
Flame emission & atomic absorption spectroscopy
This document provides an overview of flame emission spectroscopy and atomic absorption spectroscopy. It discusses the theory, principles, instrumentation, interferences and applications of both techniques. Flame emission spectroscopy measures the light emitted from excited atoms in a flame, while atomic absorption spectroscopy measures the absorption of light by ground state atoms. Both can be used to analyze metals but atomic absorption spectroscopy provides better precision and is applicable to more elements.
Chetan
Flame photometry is a technique that uses the intensity of light emitted from excited metal atoms to determine the concentration of metals in a solution. It works by nebulizing a liquid sample into a flame, which excites the metal atoms causing them to emit light at characteristic wavelengths. A monochromator isolates the wavelengths, and a detector measures the light intensities to quantify the metals. Common applications include analysis of sodium, potassium, lithium, calcium, and barium in biological fluids and industrial samples. Potential interferences include overlap of emission spectra between elements, ionization of atoms, and chemical reactions affecting atomization. New technologies allow simultaneous detection of multiple elements to improve accuracy and efficiency.
Atomic absorption Spectrophotometry
Spectrophotometer , types of spectrophotometer, atomic absorption spectrophotometer working principle, instruments of AAS, cathode hollow lamp, chopper, Flame, Burner , total consumption burner, pre-mix burner , Monochromators prism and diffraction grating , read out device, types of AAS, Flame AAS , non flame AAS(Graphite furnace AAS ), applications , interference , atomic emission spectrophotometry different types of flame , principle of emission spectrophotometry, comparision of spectrophotometry.
1606732404-atomic-absorption-emission-2.ppt
Atomic absorption spectroscopy analyzes elements by measuring the absorption of light after atoms have been vaporized. It works by passing light from a hollow cathode lamp of the element through the vaporized sample. The amount of light absorbed is proportional to the concentration of the element in the sample. Samples are typically vaporized using a flame or graphite furnace atomizer. The spectrometer contains a light source, atomizer, monochromator to select the wavelength, and detector. Concentrations are determined using a calibration curve made by measuring standards of known concentration.
Atomic Absorption Techniques & Applications
The document discusses atomic absorption spectrometry (AAS) and its use in analyzing metals. It describes the basic components and process of AAS, including how samples are atomized in flames or graphite furnaces and the light absorption is measured. It also lists some common elements that are analyzed by AAS and applications in areas like environmental, food, and clinical testing.
Atomic absorption spectroscopy
Atomic absorption spectroscopy is an analytical technique that measures the concentration of elements in samples. It works by vaporizing the sample into free atoms and passing light from a hollow cathode lamp of the target element through the vapor. The amount of light absorbed is proportional to the concentration of the element. The technique has various applications in fields like clinical analysis, environmental monitoring, and mining. It involves preparing samples, calibrating the instrument using standards, and accounting for potential interferences from other elements or molecules.
ATOMIC ABSORPTION SPECTROSCOPY by Faizan Akram
Atomic absorption spectroscopy is a technique for determining the concentration of a particular metal element in a sample. Atomic absorption spectroscopy can be used to analyze the concentration of over 62 different metals in a solution.
ATOMIC ABSORPTION SPECTROPHOTOMETRY
Introduction
Principle
Instrumentation
1. Sharp line radiation source
2. Nebulizer and Burner
3. Monochromator
4. Photomultiplier
5. Recording system
Flameless vaporization techniques
1. Electro thermal atomizers
2. Cold vapour systems
3. Hydride generation systems
Interferences in atomic absorption spectroscopy
1. Special
2. Chemical
Advantages
Disadvantages
Applications
Conclusion
Similar to Presentation1 (20)
Recently uploaded
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
NIPER JEE PYQ
NIPER JEE QUESTIONS
MOST FREQUENTLY ASK QUESTIONS
NIPER MEMORY BASED QUWSTIONS
skeleton System.pdf (skeleton system wow)
🔥🔥🔥🔥🔥🔥🔥🔥🔥
إضغ بين إيديكم من أقوى الملازم التي صممتها
ملزمة تشريح الجهاز الهيكلي (نظري 3)
💀💀💀💀💀💀💀💀💀💀
تتميز هذهِ الملزمة بعِدة مُميزات :
1- مُترجمة ترجمة تُناسب جميع المستويات
2- تحتوي على 78 رسم توضيحي لكل كلمة موجودة بالملزمة (لكل كلمة !!!!)
#فهم_ماكو_درخ
3- دقة الكتابة والصور عالية جداً جداً جداً
4- هُنالك بعض المعلومات تم توضيحها بشكل تفصيلي جداً (تُعتبر لدى الطالب أو الطالبة بإنها معلومات مُبهمة ومع ذلك تم توضيح هذهِ المعلومات المُبهمة بشكل تفصيلي جداً
5- الملزمة تشرح نفسها ب نفسها بس تكلك تعال اقراني
6- تحتوي الملزمة في اول سلايد على خارطة تتضمن جميع تفرُعات معلومات الجهاز الهيكلي المذكورة في هذهِ الملزمة
واخيراً هذهِ الملزمة حلالٌ عليكم وإتمنى منكم إن تدعولي بالخير والصحة والعافية فقط
كل التوفيق زملائي وزميلاتي ، زميلكم محمد الذهبي 💊💊
🔥🔥🔥🔥🔥🔥🔥🔥🔥
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
(A Free eBook comprising 3 Sets of Presentation of a selection of Puzzles, Brain Teasers and Thinking Problems to exercise both the mind and the Right and Left Brain. To help keep the mind and brain fit and healthy. Good for both the young and old alike.
Answers are given for all the puzzles and problems.)
With Metta,
Bro. Oh Teik Bin 🙏🤓🤔🥰
CHUYÊN ĐỀ ÔN TẬP VÀ PHÁT TRIỂN CÂU HỎI TRONG ĐỀ MINH HỌA THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN TẬP VÀ PHÁT TRIỂN CÂU HỎI TRONG ĐỀ MINH HỌA THI TỐT NGHIỆP THPT ...Nguyen Thanh Tu Collection
https://app.box.com/s/qspvswamcohjtbvbbhjad04lg65waylfGeography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
Geography as discipline
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
Internet resources for social science
Temple of Asclepius in Thrace. Excavation results
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
BIOLOGY NATIONAL EXAMINATION COUNCIL (NECO) 2024 PRACTICAL MANUAL.pptx
Practical manual for National Examination Council, Nigeria.
Contains guides on answering questions on the specimens provided
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptx
Slides from a Capitol Technology University webinar held June 20, 2024. The webinar featured Dr. Donovan Wright, presenting on the Department of Defense Digital Transformation.
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
How to Manage Reception Report in Odoo 17
A business may deal with both sales and purchases occasionally. They buy things from vendors and then sell them to their customers. Such dealings can be confusing at times. Because multiple clients may inquire about the same product at the same time, after purchasing those products, customers must be assigned to them. Odoo has a tool called Reception Report that can be used to complete this assignment. By enabling this, a reception report comes automatically after confirming a receipt, from which we can assign products to orders.
Recently uploaded (20)
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
CHUYÊN ĐỀ ÔN TẬP VÀ PHÁT TRIỂN CÂU HỎI TRONG ĐỀ MINH HỌA THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN TẬP VÀ PHÁT TRIỂN CÂU HỎI TRONG ĐỀ MINH HỌA THI TỐT NGHIỆP THPT ...
Geography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
Geography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
BIOLOGY NATIONAL EXAMINATION COUNCIL (NECO) 2024 PRACTICAL MANUAL.pptx
BIOLOGY NATIONAL EXAMINATION COUNCIL (NECO) 2024 PRACTICAL MANUAL.pptx
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptx
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptx
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
220711130088 Sumi Basak Virtual University EPC 3.pptx
220711130088 Sumi Basak Virtual University EPC 3.pptx
Presentation1
- 1. SOS IN ENVIRONMENTAL CHEMISTRY JIWAJI UNIVERSITY GWALIOR PRESENTATION ON – ATOMIC ABSORPTION SPECTROSCOPY Presented to Presented by Dr . NIMISHA JADON AKASH SAXENA (Assistant Professor) M.Sc. ICA (2nd SEM)
- 3. HISTORY Atomic absorption spectroscopy is deals with the absorption of specific wave length of radiation by neutral atoms in the ground state. The first atomic absorption spectroscopy was built by CSIRO scientist Alan Walsh & Co- Workers in Melbourne in 1954 The first commercial AAS was introduced in 1959. Alan Walsh (1916- 1998) INTRODUCTION
- 4. PRINCIPLE When solution of metallic salt is sprayed on to a flame, fine droplets are formed due to the thermal energy of flame. The solvent in the flame is evaporated, leaving fine residue, which are converted to neutral atoms. These neutral atoms absorb radiation of specific wavelength emitted by Hollow Cathode Lamp. For the determination of every element, specific Hollow Cathode Lamp is used.
- 5. LIQUID SAMPLE FORMATION OF DROPLETS FINE RESIDU E FORMATION OF NEUTRAL ATOMS NEUTRAL ATOMS ABSORB SPECIFIC WAVELENGTH OF RADIATION MEASUREMENT OF INTENSITY OF RADIATION BY USING PHOTOMETRIC DETECTOR
- 6. FIG: Instrumental setup for atomic absorption spectroscopy INSTRUMENTATION
- 7. 1. LIGHT SOURCE The light source is usually a Hollow Cathode Lamp of the element that is being measured. It consist a tungsten anode and a hollow cylindrical cathode made of the element to be determined. These are sealed in a glass tube filled with an inert gas (Neon OR Argon). Each element has its own unique lamp which must be used for that analysis. Fig: HOLLOW CATHODE LAMP
- 8. FLAME
- 9. Temperature profile when fuel is Natural Gas and oxidant is Air
- 10. 2. ATOMIZER Atomization is done by exposing the analyte to high temperature in a flame or electro thermal atomizer. (i). Flame Atomizer The most common way is to use a flame which is used for converting the liquid sample into the gaseous state. There are two types of flame atomizer; (a).Total Consumption Burner (b).Premixed Burner Types of atomizer There are two types of atomizer
- 11. (a). Total Consumption burner (b). Premixed burner
- 12. (ii). Electro thermal atomizer In electro thermal atomizer firstly sample is evaporated at a low temperature and then it is converted into ash by increasing the temperature after ashing, the temperature is increased from 2000-3000C. Atomization of sample occur in few seconds Commonly used electro thermal atomizer is Graphite tube. Graphite tube HCL
- 13. 3. SAMPEL INTRODUCTION SYSTEM In atomizer, sample is constantly introduced in form of droplets. NEBULIZER: A device for converting sample into fine spray or droplets. Capillary Nebuliser Sample Solution
- 14. 4. MONOCHROMATER Monochromater is used to separate out all of the thousand of lines. In AAS Prism OR Grating system is used as a monochromater. 5. DETECTORS For AAS Photomultiplier tube is used. 6. READOUT DEVICE In AAS, measurement chart recorder is used as readout device.
- 15. INTERFERENCES Different types of interferences which affect AAS are as follows- 1. Spectral Interference 2. Chemical Interference 3. Ionization Interference 4. Solvent Interference
- 16. ADVANTAGES Equipment relatively cheap Easy to use (training easy compared to furnace) Good precision High sample throughput Relatively easy method development Cheap to run
- 17. DISADVANTAGES Lack of sensitivity (compared to furnace) Problems with refractory elements Require large sample size Sample must be in solution
- 18. APPLICATIONS 1. Qualitative Analysis 2. Quantitative Analysis 3. Estimation of trace elements in biological fluid like blood, urine, etc. 4. Estimation of trace elements like Copper , Nickel and Zinc in food products. 5. Estimation of Lead in petrol. 6. Estimation of elements in soil samples , water supply , effluents , ceramics , etc.
- 19. REFERENCES Principles of Instrumental Analysis, 6th Edition (Douglas A. skoog) Instrumental Methods of Chemical analysis 5th Edition (Gurdeep R. Chatwal) The application of Atomic Absorption Spectra to Chemical analysis (A. Walsh (1995)) Wikipedia