Analysis of triple-label samples by liquid scintillation spectrometry.
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.
European Commission, DG Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg, Geel B-2440, Belgium. timotheos.altzitzoglou@cec.eu.int
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D000465:Algorithms; D045424:Complex Mixtures / Q000032:analysis* / Q000592:standards; D018499:Linear Energy Transfer; D008956:Models, Chemical; D015233:Models, Statistical; D010761:Phosphorus Radioisotopes / Q000032:analysis* / Q000592:standards; D011874:Radiometry / Q000379:methods; D015203:Reproducibility of Results; D012588:Scintillation Counting / Q000379:methods* / Q000592:standards; D012680:Sensitivity and Specificity; D012996:Solutions; D013462:Sulfur Radioisotopes / Q000032:analysis* / Q000592:standards
D045424:Complex Mixtures; D010761:Phosphorus Radioisotopes; D012996:Solutions; D013462:Sulfur Radioisotopes