| 多接收器等离子体质谱（MC-ICP-MS )Pb同位素高精度研究 |
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| 关键词:MC-ICPMS Pb isotopes Tl doping NBS981 NBS982 |
| 基金项目:本文由国家自然科学基金重点项目（编号40331005）和国家自然科学基金面上项目（编号40473039）资助 |
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| High-precision Analysis of Pb Isotope Ratios Using MC-ICP-MS |
| A method for high-precision measurement of Pb isotopes using MC-ICPMS has been established, with the employment of Tl doping technique. The method includes the calibration of the "true value" of Tl isotopes using NBS982 by assuming the mass fractionation factors of Pb and Tl isotopes are equal, and investigation of the effects of TI concentration doped in Pb solution. Repeated measurements of NBS981 using the techniques developed have obtained the following values: 208Pb/206Pb=2.1674±0.0004, 207Pb/206Pb=0.9147±0.00018, 206Pb/204P6= 16.9402±0.007, 207Pb/204Pb＝15.4966±0.0030, 208Pb/204Pb=36.7155±0. 015. These results are consistent with those of TIMS method using double or triple spikes. |
| He Xuexian,Zhu Xiangkun,Yang Chun,Tang Suohan.2005.High-precision Analysis of Pb Isotope Ratios Using MC-ICP-MS[J].Acta Geoscientica Sinica,26(z1):19-22. |
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