正热电离质谱测定稳定氯同位素准确度和精度的控制方法

摘要

Based on the research of 133Cs2Cl+ thermionic for many years,with a set of experiments in which the standard samples have been pre-treatment strictly, we discussed the interrelation of the emission characteristics of 133Cs+ and 133Cs235Cl+. The relationship between 133Cs+/133Csf Cl+ ratio and the quality of measurement data were investigated through this paper. We recommend that using the 1J3Cs+/133Cs235 Cl+ ratio as the guidepost of high-precision thermal ionization mass spectrometry determination for chlorine isotopes.%在对133Cs2Cl+热离子研究的基础上,通过对一组标准样品的严格前处理及测试,对石墨非还原热离子发射特性下133Cs+和133Cs235Cl+发射的相互关系以及与测试数据质量关系进行了研究讨论,并建议采用133Cs+/133Cs235Cl+比值作为石墨涂样正热电离质谱法高精度测定氯同位素的一种数据质量控制指标.