General view of chemist Francis Ptak operating a Perkin-Elmer Model 5000 Atomic Absorption Spectrophotometer at a Gascoyne Laboratories facility located in Baltimore, Maryland. Per notations accompanying the photograph, the instrument was used to conduct a range of analyses, including environmental, agricultural, meat, precious metals, and mineral samples.
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Perkin-Elmer Corporation. “Perkin-Elmer Atomic Absorption Spectrophotometer in Use at Gascoyne Laboratories,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/gf06g361z.
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