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Journal of Lipid Research, Vol. 3, 372-377, July 1962
Copyright © 1962 by Lipid Research, Inc.

A flow-through method for scintillation counting of carbon-14 and tritium in gas-liquid chromatographic effluents

Arthur Karmen , Irmgarde McCaffrey , and Robert L. Bowman

National Heart Institute, Bethesda 14, Maryland

A method for radioassay of gas-liquid chromatographic effluents by scintillation counting has been developed. A cartridge filled with anthracene crystals is used as a "flow-through" radiation detector. Upon leaving the column, the effluent is passed over hot copper oxide, which converts the organic materials to carbon dioxide and water. If tritium is to be counted, the water is reacted with hot iron to release hydrogen and tritium gases. The effluent is then passed through the anthracene cartridge. The counting rate of the cartridge is monitored continuously during the analysis by a highly efficient, low-background, scintillation counter to yield a record of eluted radioactivity that resembles the conventional mass detector record.

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