Robert Bills, Aerospace Fuels Lab chemist, views a spectrum after running a sample through an infrared spectrometer in the Investigative Analysis Lab at Wright-Patterson Air Force Base, Ohio, Feb. 13, 2018. Bills reviews the spectrum for clues about the compound’s makeup. ( Air Force photo by Michelle Gigante)

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Keywords: aerospace, analysis, chemist, chemistry, chromatogram, fluid, fuels, hydraulic, infrared, investigative, lab, routine, spectrometer