The complexation of ²³⁸U and ²³⁴U in tap water and seawater after the use of a selective membrane was examined. At the first step, many ligands were used for original membranes preparation and their yields in uranium analysis were evaluated by X-ray fluorescence, in order to select the ligand with the highest uranium selectivity in water samples. At the second step the new prepared membrane was used for uranium analysis by α-spectrometry. Various factors were tested for a more effective uranium binding such as a membrane’s active surface, water sample volume, equilibration time, and stirring during the process. After membrane complexation, uranium was separated by anion exchange and electroplated onto stainless steel plates in order to prepare suitable α-ray sources; these sources were measured by α-spectrometry and gave high chemical uranium recoveries and very good energy resolution spectra. The method can successfully be applied even for relatively small sample volumes and seawater samples.

中文翻译：

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自来水和海水样品中的选择性膜络合和铀同位素分析

²³⁸ U和²³⁴的络合使用选择性膜后，检查了自来水和海水中的U。第一步，将许多配体用于原始膜的制备，并通过X射线荧光评估铀分析中的收率，以选择水样品中铀选择性最高的配体。在第二步中，将新制备的膜用于通过α光谱法进行铀分析。测试了各种因素以实现更有效的铀结合，例如膜的活性表面，水样体积，平衡时间以及过程中的搅拌。膜络合后，通过阴离子交换分离铀并电镀到不锈钢板上，以制备合适的α射线源。这些来源通过α光谱仪进行了测量，并具有很高的化学铀回收率和非常好的能量分辨率谱。该方法甚至可以成功地应用于相对较小的样品量和海水样品。