【摘要】 研究了痕量Np和Pu的同步分离测量方法。利用相同价态Np和Pu的化学行为和物理性质的相似性,以242Pu为指示剂,用TOA萃取色层-Dowex阴离子交换双柱联合同步分离纯化,ICP-MS同时定量237 Np和239Pu,实现237 Np和239Pu的同步分离测量。实验结果表明,相同价态的Np和Pu在色层柱中的化学行为相似,理论计算ICP-MS测量237 Np和242Pu的灵敏度差异小于1%。所建流程与相应前处理方法结合,能够用于不同的待测样品中痕量237 Np和239Pu的分析。更多还原

【Abstract】 A method for the synchronous determination of neptunium and plutonium at trace level was developed.Based on the similar chemical behavior at the same oxidation state and physical characteristic of Np and Pu,237Np and 239Pu could be synchronous purified by TOA extraction and Dowex anion exchange double chromatographic columns,and determined by inductively coupled plasma mass spectrometry(ICP-MS),using 242Pu as tracer.The result indicates that Np and Pu have similar chemical behavior in the separation scheme,and less than 1% detection discrepancy of Np and Pu by ICP-MS is obtained.The procedure can be used for different environmental samples after suitable sample preparation.更多还原