Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-1015 - C1-1020|
|Published online||25 March 2010|
Application of a liquid scintillation counter to the measurement of tracing radioactivity in experiments on suspended matter uptake in aquatic environments
Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Fisica, University of Seville, Apdo. 41060 Sevilla, Spain
2 Departamento de Fisica 2, University of Seville, ETSA, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
3 Departamento de Fisica Aplicada 1, University of Seville, EUITA, Carretera de Utrera km 1, 41013 Sevilla, Spain
The experiments on the study of the kinetic transfer coefficients of conservative and non-conservative radionuclides, in aquatic environments, need to determine radionuclide activity in large number of samples. Different radioactivity measurement techniques can be selected for analyses, but the liquid scintillation technique is preferred due to its easy sample treatment and its low time consumption. Samples are initially traced with a known activity of a selected radionuclide (239Pu, 241Am or 99Tc). The transference of radionuclides, from the water to the suspended matter, is studied through the determination of the residual activity in aliquots of water sample, which are successively collected with time. In this work, we present the experimental procedures used for the 239Pu, 241Am and 99Tc activity measurement by liquid scintillation counting, using a Wallac Quantulus 1220 spectrometer. Results of the application of this technique to traced water samples are also shown in this study.
© EDP Sciences, 2002
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