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Atomic Absorption Spectroscopy

A spectroscopy chemical analytical technique used for determining the metal elements in water by measuring the well-defined characteristic light wave lengths absorbed by each respective element when the element has been thermally excited into an atomic vapor. The sample to be analyzed is atomized into an atomic vapor by either aspirating the sample into a specific flame (in flame AA) or by vaporization with a tube of graphite that is electrically heated to a temperature between 1500 and 2800 degrees C (in flameless AA). A light beam of specific characteristic wave lengths is directed through the vapor, into a monochromator that further defines the very small range of wave lengths to be analyzed, and into a detector that measures the amount of light absorbed by the atomized element. Identification of the element is possible because each element has its own well-defined characteristic absorption wave length. The amount of absorbance measured is proportional to the concentration of the element in the sample. See Also: Fahrenheit Induced Infiltration Spectroscopy AAMI Grade Water Spectrometer Induced Infiltration Spectroscopy Emission Spectroscopy