A new rapid method has been developed for the determination of Th, Pu, Np, U, Am and Cm isotopes in water samples of about 1 L. Actinides are pre-concentrated by co-precipitation with Ca phosphate, sequentially separated on stacked TEVA and TK221 cartridges and measured by alpha spectrometry. The TK221 extraction chromatographic resin contains i.e. CMPO and DGA extractants. It has been characterized by measuring the weight distribution ratios (D_w) of actinides which are higher than 1000 for all actinides in 3 M HNO₃. The method has been optimized, applied for the analysis of tap and seawater samples and validated by participating in an IAEA proficiency test. Chemical recoveries for all actinides are better than 50%. The method can be performed within one day.

开发了一种新的快速方法，用于测定约 1 L 水样中的 Th、Pu、Np、U、Am 和 Cm 同位素。锕系元素通过与磷酸钙共沉淀进行预浓缩，依次在堆叠的 TEVA 上分离，然后TK221 墨盒并通过 alpha 光谱法测量。TK221 萃取色谱树脂含有ie。CMPO 和 DGA 萃取剂。它通过测量锕系元素在 3 M HNO _{3中高于 1000 的重量分布比 (D w} ) 来表征。该方法已经过优化，适用于自来水和海水样品的分析，并通过参加 IAEA 能力测试得到验证。所有锕系元素的化学回收率均优于 50%。该方法可以在一天内完成。