Measurement of the atomic weight of ruthenium by negative thermal ionization mass spectrometry

被引：19

作者：

Huang, M

Masuda, A

机构：

[1] Department of Chemistry, University of Electro-Communications, Chofu, Tokyo 182

来源：

ANALYTICAL CHEMISTRY | 1997年 / 69卷 / 06期

关键词：

D O I：

10.1021/ac960648n

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Methods for ruthenium isotope measurement by both positive and negative ion thermal ionization mass spectrometry (PTI-MS and NTI-MS, respectively) are studied in this work. We found that Ru isotopes 100 and 104 are subjected to isobaric interferences from the silica gel used to improve sensitivity in PTI-MS. Measurement of ruthenium isotopes by NTI-MS is discussed here. The method is proved to be sensitive and free from the isobaric interferences. With precise isotope ratios of several ruthenium reagents measured by NTI-MS, we calculated the atomic weight of ruthenium to be 101.064 98 +/- 0.000 16 (2 sigma), which is much more accurate than the data of 101.07 +/- 0.02 currently suggested by IUPAC.

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页码：1135 / 1139

页数：5

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