This early 1980s double beam spectrophotometer was marketed for use with "less than pure" samples.
|View in library catalog|
“Beckman Microlab 252 CMX Computing Double Beam Infrared Spectrophotometer,” circa 1980. Beckman Historical Collection, Box 84. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/gt54kn20j.
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