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以D_2EHPA做萃取剂,以尿素做Pu(Ⅲ)的稳定剂,建立了硝酸介质中Pu(Ⅲ)和Pu(Ⅳ)的分析方法。研究表明,尿素与硝酸混合后放置时间影响Pu(Ⅳ)的定量萃取和Pu(Ⅲ)的稳定。选择适当条件,可实现硝酸介质中Pu(Ⅲ)和Pu(Ⅳ)的测定。
Using D_2EHPA as extractant and urea as stabilizer of Pu (Ⅲ), the analytical methods of Pu (Ⅲ) and Pu (Ⅳ) in nitric acid medium were established. The results show that the time of mixing urea and nitric acid affects the quantitative extraction of Pu (Ⅳ) and the stability of Pu (Ⅲ). Choosing appropriate conditions, the determination of Pu (Ⅲ) and Pu (Ⅳ) in nitric acid medium can be achieved.