| 用双稀释法测定地质样品中的铅同位素组成 |
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| 引用本文： | 王林森,张利.用双稀释法测定地质样品中的铅同位素组成[J].矿物岩石,2003,23(2):44-48. |
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| 作者姓名： | 王林森 张利 |
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| 作者单位： | 中国地质大学地球科学学院,湖北,武汉,430074 |
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| 基金项目： | 国土资源部壳幔开放实验室基金 |
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| 摘 要： | 随着超净化实验室条件的完善以及多接收同位素质谱技术的成熟，铅同位素双稀释法倍受关注。用双稀释法测定铅同位素比值的方法原理，以及^204Pb—^207Pb双稀释剂的配制和标定方法。通过对标准物质NBS981和地质样品的分析测定，表明用双稀释法测定铅同位素比值，可以有效校正由质谱分析造成的同位素分馏效应，从而提高分析结果的精度和准确度。
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| 关 键 词： | 双稀释法 地质样品 铅同位素 标定方法 质谱分析 同位素分馏效应 精度 |
| 文章编号： | 1001-6872(2003)02-0044-05 |
| 修稿时间： | 2003年1月5日 |
Pb ISOTOPIC ANALYSIS OF GEOLOGICAL SAMPLES USING 204Pb-207Pb DOUBLE THINNER |
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| WANG Lin-sen,ZHANG Li Faculty of Earth Sciences,China University of Geoscierces,Wuhan ,China.Pb ISOTOPIC ANALYSIS OF GEOLOGICAL SAMPLES USING 204Pb-207Pb DOUBLE THINNER[J].Journal of Mineralogy and Petrology,2003,23(2):44-48. |
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| Authors: | WANG Lin-sen ZHANG Li Faculty of Earth Sciences China University of Geoscierces Wuhan China |
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| Institution: | WANG Lin-sen,ZHANG Li Faculty of Earth Sciences,China University of Geoscierces,Wuhan 430074,China |
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| Abstract: | Pb isotope analysis of using a 204Pb- 207Pb double thinner has drawn much attention with the ultra-clean chemical laboratory and multi-collector mass spectrometry. The principles of Pb isotope analysis of using a double thinner are introduced, and the method of compound and determination of 204Pb- 207Pb double thinner are presented. The Pb isotopic analyses for standard NBS981 and geological samples suggest that isotopic fractionation caused by mass spectrometry can be corrected effectively by using a 204Pb- 207Pb double thinner and thus improve the precision and accuracy of the analysis. |
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| Keywords: | 204Pb-207Pb double thinner Pb isotopic analysis isotopic fractionation |
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