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介绍核工业部北京第五研究所用国产质谱计开展质谱同位素稀释分析(IDMS)的一些情况。国产ZhT—1301和ZhT—05A质谱计测同位素比的精度优于±1%,能满足一般IDMS分析的要求。对上述两种仪器作了改进。给出U、Th、Pb、B、Sm、Gd、Eu痕量元素IDMS分析结果。在国际对比分析中,用ZhT—1301获得的数据,是偏离真值最小的数据之。
This paper introduces some cases of mass spectrometry isotope dilution analysis (IDMS) conducted by the Fifth Research Institute of Beijing Institute of Nuclear Industry using a domestic mass spectrometer. Domestic ZhT-1301 and ZhT-05A mass spectrometry isotope ratio accuracy of better than ± 1%, to meet the requirements of general IDMS analysis. The above two kinds of instruments have been improved. The results of IDMS analysis of U, Th, Pb, B, Sm, Gd and Eu trace elements are given. In the international comparative analysis, the data obtained with ZhT-1301 is the data deviating from the true value.