General view of chemist Janet Sheridan placing two oil samples into a Perkin-Elmer double-beam fluorescence spectrophotometer at a Coast Guard Research and Development Center laboratory. Per notations accompanying the photograph, the instrument is capable of analyzing two samples simultaneously and produces a single graph showing their identity and differences, aiding in the laboratory's work to track sources of oil spills.
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Perkin-Elmer Corporation. “Perkin-Elmer Fluorescence Spectrophotometer in Use at Coast Guard Laboratory,” 1970–1979. Photographs from the Perkin-Elmer-Applera Collection, Box 5. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/ht24wk351.
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