Scintillation Counting of Beta Activity on Filter Paper

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Science  27 May 1960:
Vol. 131, Issue 3413, pp. 1608-1609
DOI: 10.1126/science.131.3413.1608


Scintillation counting of beta activity on filter paper, with monoisopropylbiphenyl as a solvent of low volatility, was investigated. The method is attractive since no sample preparation is involved, and the activities are measured directly on the filter paper wetted with the scintillator solution. A linear dependence of counting rate on total activity was found for iodine-131, phosphorus-32, sodium-22, and carbon-14, and counting efficiencies were determined.