Abstract
It is possible to obtain accurate results with the normal liquid scintillation method for the assay of radioactive paper strips, if the solubility of the radioactive compound being measured in the scintillation fluid is taken into account. A technique for taking this soiubility into account is described which involves the replacement of the radioactive paper strip in the sample container by an inactive paper strip and the use of a standard radioactive paper strip. The ratio of efficiencies for activity in solution and on the strip was determined for three different papers. (D.L.C.)
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