General view of laboratory technician Margaret Kreiser using the heated graphite atomizer (HGA) attachment of a Perkin-Elmer Model 403 Atomic Absorption Spectrophotometer to test a chocolate sample for volatile elements at a Hershey Company facility. Per notations accompanying the photograph, Kreiser is seen piping a liquid sample into the electric furnace of the unit.
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Perkin-Elmer Corporation. “Perkin-Elmer Atomic Absorption Spectrophotometer in Use at Hershey Company Facility,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/0g354g091.
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