General view of chemist Robert Potts inserting a programming card into the heated graphite atomizer (HGA) of a Perkin-Elmer atomic absorption spectrophotometer in use at the State of Virginia's Environmental Laboratory. Per notations accompanying the photograph, the programming card instructs the HGA in sequences and time periods for automated atomization of up 35 trace metal samples.
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Perkin-Elmer Corporation. “Perkin-Elmer Atomic Absorption Spectrophotometer in Use at State of Virginia Environmental Laboratory,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 6. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/sf2685870.
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