atomic absorption spectrophotometry
noun
: a method of spectrophotometry that relies on the absorption of specific frequencies of light by atoms in order to identify the chemical composition of a sample
… the venerable technique of emission spectrometry has been overshadowed in recent years by rapid advances in the related field of atomic absorption spectrophotometry.—Chemical & Engineering News, 19 Mar. 1979
called also absorption spectrophotometry
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Merriam-Webster unabridged
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