地球学报2011，Vol.32Issue(5)：601-609,9.DOI:10.3975/cagsb.2011.05.10
钼同位素比值的双稀释剂测定方法研究
Mo Isotope Measurements Using Double Spike Techniques
摘要
Abstract
Techniques for high-precision measurement of Mo isotopic ratios using MC-ICP-MS have been developed, and the instrumental mass discrimination is corrected by double spike approaches. In this paper, the 100Mo/97Mo ratios of Fisher-Mo standard solution and double spike were calibrated by 104Pd/102Pd firstly, and then the calibrated 100Mo/97Mo ratio was employed for calibration of other Mo isotopic ratios. The external precision achieved over a period of 10 months is 0.035‰/amu at 95% confidence level, better than that of sample-standard bracketing. There is no difference in the Mo isotopic composition calculated by different calibration results (in the open university of UK and in the authors' laboratory), which indicates that the effect of different spans of time and instruments and the precision of 104Pd/102Pd can be neglected. The Mo isotopic compositions of 2 black shale samples obtained in this laboratory is in excellent agreement with that of the open university of UK, showing that the Mo isotopic data of the authors' laboratory are reliable.关键词
钼同位素/多接收器等离子体质谱/双稀释剂/长期重现性Key words
Mo isotopes/MC-ICP-MS/double spiking/repeatability分类
化学化工引用本文复制引用
李津,朱祥坤,唐索寒..钼同位素比值的双稀释剂测定方法研究[J].地球学报,2011,32(5):601-609,9.基金项目
本文由国家高技术研究发展计划(863计划)(编号:2007AA06ZI25)、国土资源部公益性行业科研专项经费(编号:201011027-1)和国家重点基础研究发展规划项目(编号:2007CB411408)联合资助. （863计划）
