What is atomic absorption spectroscopy and used?
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Atomic absorption spectroscopy (AAS) is an analytical technique used for the quantitative and qualitative determination of elements in various samples. It measures the amount of electromagnetic energy absorbed by a cloud of atoms of a specific chemical element as it passes through the sample. AAS is widely used in fields such as clinical chemistry, food analysis, environmental monitoring, and industrial quality control. It offers rapid analysis, high accuracy, and sensitivity, and is relatively simple and low-cost. AAS can determine over 60 chemical elements from a wide range of samples, including aqueous solutions, metals, drugs, and biological samples. It has been applied in combination with microwave digestion systems and fiber optic technology to improve detection limits and simplify sample introduction. Continuum source AAS has also been developed to allow simultaneous determination of multiple elements.
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20 Jan 2012 | Atomic absorption spectroscopy (AAS) is an analytical technique used for the quantitative and qualitative determination of elements in various samples. It measures the amount of electromagnetic energy absorbed by atoms of a specific chemical element, providing information about the element concentration in the sample. |
| Atomic absorption spectroscopy is a technique used to analyze samples by measuring the absorption of light by atoms. The provided paper describes an atomic absorption spectrometer that uses a polychromator arrangement for detection. | |
| Atomic absorption spectroscopy (AAS) is a technique used to determine the elemental composition of a sample by measuring the absorbed radiation by the chemical element of interest. It is widely used for analyzing essential elements in various matrices, including food products. | |
4 Citations | Atomic absorption spectrometry (AAS) is a widely used method for analyzing substances. It allows for the determination of about 70 elements and is commonly used in the analysis of food, pharmaceuticals, water, oil, and biological objects. |
| Atomic absorption spectrometry (AAS) is a well-established instrumental technique used for the quantitative measurement of essential and nonessential elements found in body tissues and fluids. |
Related Questions
What is flame atomic absorption spectrophototmetry?5 answersFlame atomic absorption spectrophotometry (FAAS) is a well-established technique for the quantitative determination of elements in environmental materials at trace and ultratrace levels. FAAS is an optical atomic spectrometric technique that measures the specific absorption of free, unionized atoms in the gas phase. It uses different types of atomizers, such as the flame and the graphite furnace, to convert the analyte into free atoms. The detection limits of FAAS are typically in the range of 1-100 μg L−1, making it suitable for the determination of minor and trace elements in contaminated samples. FAAS is a single element technique but there are commercial instruments available that can determine multiple elements simultaneously. One manufacturer has even developed high-resolution instruments working with continuum sources (HRCS-AAS).
What is atomic absorption spectrometry?4 answersAtomic absorption spectrometry (AAS) is a technique used for analyzing samples to determine the concentration of elements present. It involves the absorption of characteristic radiation emitted by atoms in the sample. AAS can be performed using different atomization methods, such as flame atomization or electrothermal atomization. The technique offers excellent elemental selectivity and has widespread usage with documented methodologies for various samples and matrices. A graphite furnace, also known as an electrothermal atomizer (ETA), is often used in AAS to achieve lower detection limits. The use of high-resolution (HR) instruments in AAS has also contributed to advancements in the field. AAS can be used for routine determination of trace and ultratrace metals, and various strategies are employed to overcome potential interferences.
What are some applications of absorption spectroscopy?5 answersAbsorption spectroscopy has various applications. It is widely used in the monitoring of atmospheric greenhouse gases, pollution, and respiration processes, including human breath analysis. In the field of energy storage materials, absorption spectroscopy provides insights into the coordination environments, valence, and spin states, which are crucial for optimizing electrochemical performance. Quantum absorption spectroscopy offers a provable quantum advantage over classical spectroscopic schemes and has applications in material, chemical, and biological sample analysis. Gas in scattering media absorption spectroscopy (GASMAS) is used for non-invasive monitoring of premature babies, providing information on oxygen and water vapor content in the lungs. Infrared laser absorption spectroscopy, specifically using quantum cascade lasers, is a promising technique for sensing trace gases in molecular spectroscopy, industrial process control, combustion diagnostics, and medical breath analysis.
What is atomic absorption spectroscopy?5 answersAtomic absorption spectroscopy (AAS) is a technique used to determine the elemental composition of a sample by measuring the absorption of radiation by the chemical element of interest. AAS is a relatively simple and low-cost technique with high sensitivity and precision. It involves the use of a hollow cathode lamp (HCL) to provide characteristic radiation, which is absorbed by the atoms in the sample. The absorption of radiation occurs at specific wavelengths, which are unique to each element, allowing for the identification and quantification of elements in the sample. A microwave digestion system is often used for sample preparation, especially for complex food matrices. Recent advancements in technology, such as fiber optic technology and improved sample introduction methods, have further enhanced the capabilities of AAS. Overall, AAS is a widely used technique for elemental analysis in various fields, including food analysis.
How can atomic absorption spectroscopy be used to determine the concentration of nanoparticles?5 answersStep 1:
Atomic absorption spectroscopy (AAS) can be used to determine the concentration of nanoparticles by studying the influences of various factors on the concentration determination, including digestion method, ionization interference, acidic medium, background correction method, and organic matter. It is important to note that AAS can accurately measure the nanoparticle concentration at ppm-level under specific conditions, and the choice of background correction method is crucial for samples with lower nanoparticle concentrations.
Step 3:
Atomic absorption spectroscopy (AAS) can be used to determine the concentration of nanoparticles by studying the influences of various factors on the concentration determination, including digestion method, ionization interference, acidic medium, background correction method, and organic matter. It is important to note that AAS can accurately measure the nanoparticle concentration at ppm-level under specific conditions. The choice of background correction method is crucial for samples with lower nanoparticle concentrations.
How are atomic absorption and emission spectroscopy used to analyze nanomaterials?5 answersAtomic absorption and emission spectroscopy are used to analyze nanomaterials in various ways. These techniques are employed to improve the sensitivity and selectivity of atomic spectrometric methods, broaden the application range to biological-molecule detection, and characterize and determine nanomaterials themselves and their impurities. X-ray absorption spectroscopy (XAS) is another powerful technique used to study nanomaterials. It helps determine the variation in interatomic distances, coordination numbers, and the type of neighboring atoms within the first few coordination shells of the atom of interest in nanoparticles. Additionally, ultraviolet-visible (UV-vis) spectroscopy, infrared (IR) absorption spectroscopy, Raman scattering, and surface-enhanced Raman scattering (SERS) are used for nanomaterial characterization. These spectroscopic techniques provide valuable information on the structural and chemical properties of nanomaterials.