Popov L
Kozloduy Nuclear Power Plant, Safety Department, Environmental Monitoring Division, 3321 Kozloduy, Bulgaria.
Appl Radiat Isot. 2012 Oct;70(10):2370-6. doi: 10.1016/j.apradiso.2012.05.019. Epub 2012 Jun 9.
Alternative method for determination of uranium isotopes in various environmental samples is presented. The method is based on total decomposition of the solid materials and preconcentration of liquid samples. The separation of uranium from interfering radionuclides and stable matrix elements is attained by liquid-liquid extraction with triisooctylamine/xylene in hydrochloric media. After the additional removal of stable iron by extraction with diisopropyl ether, purified uranium is electrodeposited on stainless steel disks and measured by alpha spectrometry. The analytical method has been successfully applied to the determination of uranium isotopes in water and bottom sediments from the rivers Danube, Ogosta and Tzibritza in Northwestern Bulgaria. The analytical quality was checked by analyzing reference materials with different matrices.
介绍了测定各种环境样品中铀同位素的替代方法。该方法基于固体材料的完全分解和液体样品的预浓缩。在盐酸介质中用三异辛胺/二甲苯进行液-液萃取，实现铀与干扰放射性核素和稳定基体元素的分离。用二异丙醚萃取进一步除去稳定的铁后，将纯化的铀电沉积在不锈钢圆盘上，并用α能谱法进行测量。该分析方法已成功应用于保加利亚西北部多瑙河、奥戈斯塔河和齐布里察河的水和底部沉积物中铀同位素的测定。通过分析不同基体的标准物质来检验分析质量。
