Atomic absorption spectroscopy is another interesting form of spectroscopy. It is specifically designed for the analysis of these metals and metalloids substances. By definition, AAS is a qualitative analytical technique wherein the absorption of a particular wavelength of radiation from the neutral atoms in the ground state is measured. The more the number of the atoms in a given sample, the greater Is the high level of absorption and vice-versa. This is also called as Metallic analysis Spectroscopy since it is largely used for the analysis of metals. A liquid sample is allowed to convert into free atoms desolated and atomized. All these free atoms absorb the light of a particular wavelength. The remaining unabsorbed light is detected and recorded. The high level of absorption is directly proportional to the concentration of the sample.
Atomic absorption spectroscopy has easy instrumentation. But, unlike other spectroscopy procedures, it has two additional requirements. These include a specially designed lamp to make light of a desired wavelength and a burner to prepare the sample for the absorption of radiation. Moreover, the tool also sprays the sample from the atomic absorption spectroscopy. This contributes to evaporation of the solvent and leaves a nice dry residue. This residue has neutral atoms in the ground state. The atomizer burner to dry the sample and produce atoms. Sample container. Fuel and oxidant to burn the sample by warmth. Hollow cathode lamp to make light of the desirable wavelength. Detector to discover the absorption intensity. Amplifier and data recorder.
The tool is currently available as single and double beam instruments. The light source should Create a narrow spectrum with very little background noise. Aside from the light ought to be stable and possess sufficient intensity. Two types of light sources can be utilized depending on the requirement. This is most widely used as a light source. Within the lamp, the cathode is coated with a metal of analyte to be examined. As an example, if magnesium is to be examined from the sample, a cathode coated with calcium is used.