Determination of90Sr by thin layer radiochromatography |
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Authors: | E Gattavecchia D Tonelli |
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Institution: | (1) Istituto di Scienze Chimiche, Facoltà di Farmacia, Università di Bologna, 40 127 Bologna, (Italy) |
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Abstract: | A simple method for the determination of90Sr by using thin layer chromatography on silica gel or cellulose pretreated with calcium oxalate is proposed. In these conditions a complete separation between strontium and its daughter yttrium is obtained. Radioactivity of separated elements was measured by a linear multiscanner analyzer and the results were computer processed to obtain the activity of90Sr. The method has been applied to samples of water and milk subjected to a very simple extraction procedure. Under the experimental conditions used, the detection limit is about 25 mBq of deposited radioactivity, which corresponds to about 6 Bq/l. |
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