This article focuses on some of the factors pertinent to atomic absorption spectroscopy (AAS). It begins by describing the working principle, critical components, and construction of flame atomic absorption instrumentation. This is followed by sections discussing various types of interferences in AAS, namely vaporization, ionization, matrix interferences, and background correction. Some of the methods for the analysis of microliter-sized samples and methods of standard additions to the sample solution for generating calibration standards are then reviewed. The article concludes with a section on processes involved in matrix matching.
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