Bestimmung des Gehaltes an90Sr und89Sr in Proben tierischer und pflanzlicher Herkunft |
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| Authors: | N Borus-Böszörményi J Kovács |
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| Institution: | 1. Zentralstelle für Lebensmittelkontrolle und Chemische, Untersuchung des Ministeriums für Landwirtschaft und Ern?hrungswesen, Guszev u. 25, Pf. 8, 1355, Budapest, (Ungarn)
2. International Atomic Energy Agency, Radiological Safety Section, P.O. Box 200, A. 1400, Vienna, (Austria)
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| Abstract: | A method is described for the determination of89Sr and90Sr in samples of plant and animal origin. The Rehak-Feddersen method was modified to measure90Sr. Modification was made in the sample preparation and in the toluene-HDEHP di(2-ethylhexyl)phosphoric acid] extraction.
After the extraction of yttrium, strontium is separated with nitric acid and—calculating with a correction factor—89Sr can directly be determined. Namely,89Sr can be measured in an aqueous solution by a liquid scintillation technique with an efficiency of 30% while90Sr with 1.4% only. Quenching of the solution—depending on the composition—which may influence the measurement of90Y and89Sr was also examined. Detection limits and reproducibilities are given. Finally, evaluation of the experimental data is reported.
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