Gd_2O_3－UO_2芯块中钆和铀含量的IDMS测定

Determination of Gadolinium and Uranium in Gd_2O_3-UO_2 Pellets Using Isotope Dilution Mass Spectrometry

本文介绍了Ｇｄ２Ｏ３－ＵＯ２芯块中Ｇｄ和Ｕ含量的同位素稀释质谱法：分别用浓缩１５７Ｇｄ和２３３Ｕ作稀释剂，定量加入到芯块溶液中，然后用萃淋树脂（ＤＨＤＥＣＭＰ）萃取分离出Ｇｄ和Ｕ，用热表面电离质谱计测定。本法对Ｇｄ和Ｕ含量的测定精密度为０．７％。

This paper describes determination of the Gadolinium and Uranium component in Gd_2O_3UO_2 pellets using isotope dilution mass spectrometry (IDMS).The rich 157Gd and 233U inquantity are spiked a solution of the Pellet, then Gadolinium and Uranium from the solutionare separated respectivly using DHDECMP, and they are determined by mass spectrometerwith thermal ion source. Their precisions are 0. 7%.