General view of an unidentified African-American chemist reviewing the results of an analysis made by a Perkin-Elmer Model 306 Atomic Absorption Spectrophotometer in the research laboratory at the Detroit Edison Company. Per notations accompanying the photograph, the atomic absorption spectrophotomer, which is equipped with a deuterium arc and Model PRS-7A Printer Sequencer, is being used to analyze acid-digested solid samples as part of permit compliance testing for the National Pollution Discharge Elimination Survey (NPDES).
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Perkin-Elmer Corporation. “Perkin-Elmer Instruments in Use at Detroit Edison Company Laboratory,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/wd375x127.
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