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在大量铀存在下微量镎的分析中,采用噻吩甲酰三氟丙酮(TTA)萃取Np(Ⅳ)可有效地去除大量铀。然而萃取法难以实现快速分离,因此若将TTA制备成萃淋树脂,采用柱分离,可实现Np(Ⅳ)的快速分离且更有利于自动化的实现,故本工作制备了TTA萃淋树脂并对其性能进行了初步研究。本研究所用的TTA萃淋树脂以苯乙烯-二乙烯苯为骨架,TTA为萃取剂,采用悬浮聚合法合成。由于TTA萃取Np(Ⅳ)时,采用硝酸体系,低酸萃取高酸反萃,所以先考察该树脂在不同浓度硝酸介质下的稳定性。取约0.1 g的树脂于萃取离心管中,再分别加入5 mL 1、6、7、8 mol/L HNO3,
In the analysis of trace amounts in the presence of a large amount of uranium, the extraction of Np (Ⅳ) with tosyltrifluoroacetone (TTA) can effectively remove large amounts of uranium. However, the extraction method is difficult to achieve rapid separation, so if the preparation of TTA extractable resin column separation, Np (Ⅳ) can be quickly separated and more conducive to the realization of automation, so this work prepared TTA extraction resin and The performance of a preliminary study. TTA extraction resin used in this study styrene - divinylbenzene as a skeleton, TTA as an extractant, the use of suspension polymerization synthesis. As TTA extraction of Np (Ⅳ), the use of nitric acid system, low acid extraction high acid stripping, so the first study of the resin in different concentrations of nitric acid medium stability. Take about 0.1 g of resin in the extraction centrifuge tube, then add 5 mL 1,6,7,8 mol / L HNO3,