What are three common uses of atomic absorption spectroscopy?
Atomic absorption spectroscopy is utilized across many industries and is instrumental in the detection of metals within a sample. As such, this process is commonly utilized in pharmacology, archaeology, manufacturing, mining, and forensics.
Why atomic absorption spectroscopy is used?
Atomic absorption spectroscopy, or AAS, is a technique for measuring the concentrations of metallic elements in different materials. As an analytical technique, it uses electromagnetic wavelengths, coming from a light source. Distinct elements will absorb these wavelengths differently.
What is spectroscopy used for in everyday life?
We use spectroscopy to help discover life on our own, and distant planets. We cross paths with spectrometers in our everyday lives. Associates use simple spectrometers at home improvement stores to analyze and match the paint color for redoing your bedroom. Researchers use it to develop cancer treatments.
Which is an example of atomic spectroscopy?
An example of this is laser ablation inductively-coupled plasma atomic emission spectrometry, where a laser is used to vaporize a solid sample and an inductively-coupled plasma is used to atomize the vapor.
How is AAS used in industry?
Industry. Many raw materials are examined and AAS is widely used to check that the major elements are present and that toxic impurities are lower than specified – eg in concrete, where calcium is a major constituent, the lead level should be low because it is toxic.
What is the principle of atomic spectroscopy?
It uses the principle that atoms (and ions) can absorb light at a specific, unique wavelength. When this specific wavelength of light is provided, the energy (light) is absorbed by the atom. Electrons in the atom move from the ground state to an excited state.
What are the principles of AAS?
Principle of AAS AAS quantitatively measures the concentrations of elements present in a liquid sample. It utilises the principle that elements in the gas phase absorb light at very specific wavelengths which gives the technique excellent specificity and detection limits.
How is spectroscopy used in industry?
These spectra can be used to detect, identify and quantify information about the atoms and molecules in a sample; in particular elemental composition, chemical state and physical properties of both inorganic material and biological systems.
Which cell is used in AAS?
There are two basic atom cells (a means of turning the sample, usually a liquid, into free atoms) used in atomic absorption spectroscopy: (i) the flame and (ii) electrothermal heating of a sample cell.
Which can be detected using atomic absorption spectroscopy?
AAS is an analytical technique used to determine the concentration of metal atoms/ions in a sample. Metals make up around 75% of the earth’s chemical elements. In some cases, metal content in a material is desirable, but metals can also be contaminants (poisons).
Which detector is used in atomic absorption spectroscopy?
Photodiode. A photodiode is a photoelectric transducer that produces an electric signal, or current, I, which results from absorption of photons.