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Analysis of triple-label samples by liquid scintillation spectrometry
1European Commission, DG Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg, Geel B-2440, Belgium. timotheos.altzitzoglou@cec.eu.int
Abstract:
The simultaneous analysis of three radionuclides present in a sample is demonstrated. The approach requires fitting a series of counting data acquired over a period of time to a triple exponential mathematical expression. The use and advantages of the method are illustrated for the case of the standardisation of 32P in the presence of 33P and 35S by 4pi-beta liquid scintillation spectrometry. The effects of sample preparation, chemical quenching and different activity ratios were studied.