28 KB392 KB26 KB199820252005Benedik, LjudmilaJakopič, Rožleštevilka:3letnik:526 stranistr. 297-302ISSN:1318-0207COBISSID:19339815URN:URN:NBN:SI:doc-L3MPF4L3enSlovensko kemijsko društvoActa chimica slovenicakemija okoljakovinekromatografijastroncijTracer studies on Sr resin and determination of sup90Sr in environmental samples|In this work various tracer experiments were performed to investigate the elution behaviour of some radionuclides on Sr resin, martix effects of calciumand potassium and the resin capacity for strontium. None of the studiedradionuclides interfered with the separation of strontium all were washed out with 3M HNO3 before the elution step with water, except barium. Barium and strontium were separated using 8M HNO3. The maximum resin capacity for strontium was 8.1 mg of Sr/g of Sr resin. Up to 2g of calcium and 200 mg of potassium can be loaded on the Sr column (3 g Sr. spec) without decrease instrontium recovery. The separation procedure using Sr resin was tested on soil samples spiked with sup90Sr standard solutions and on reference materials. All results obtained by this method gave good agreement. Counting sources were prepared by weighing SrCsub2Osub4 on a planchet. The sup90Sr content was measured with a proportional gas flow beta counter aftersecular equilibrium between sup90Sr and sup90Y was reached. The chemical recovery was determined gravimetrically and was always higher yhan 80%TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaSlovensko kemijsko društvo