| 钼同位素比值的双稀释剂测定方法研究 |
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| 关键词:Mo isotopes MC-ICP-MS double spiking repeatability |
| 基金项目:国家高技术研究发展计划(863计划)(编号: 2007AA06Z125); 国土资源部公益性行业科研专项经费(编号: 201011027-1); 国家重点基础研究发展规划项目(编号: 2007CB411408) |
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| Mo Isotope Measurements Using Double Spike Techniques |
| 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. |
| LI Jin,ZHU Xiang-kun,TANG Suo-han.2011.Mo Isotope Measurements Using Double Spike Techniques[J].Acta Geoscientica Sinica,32(5):601-609. |
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