| 微量岩石样品中Rb-Sr和Pb一步分离及高精度热电离质谱测试 |
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| 引用本文： | 李潮峰,李献华,郭敬辉,李向辉,李怀坤,周红英,李国占.微量岩石样品中Rb-Sr和Pb一步分离及高精度热电离质谱测试[J].地球化学,2011(5):399-406. |
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| 作者姓名： | 李潮峰 李献华 郭敬辉 李向辉 李怀坤 周红英 李国占 |
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| 作者单位： | 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室;中国科学院研究生院;天津地质矿产研究所; |
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| 基金项目： | 国家自然科学青年基金(40903009); 岩石圈演化国家重点实验室自主研究课题基金(专0805) |
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| 摘 要： | 采用30 μL Sr特效树脂微柱,一步分离微量岩石样品中Rb-Sr和Pb,其回收率均优于90％,流程试剂用量仅0.75 mL,分离时间约3h,Rb-Sr流程本底优于5 pg,Pb流程本底优于50 pg.本方法具有样品用量少、本底低、回收率高、分离效率高等优点.结合高灵敏度TIMS分析技术,可以实现微量岩石样品高精度Rb...
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| 关 键 词： | Rb-Sr-Pb分离 Sr特效树脂 热电离质谱 |
Single-step separation of Rb-Sr and Pb from minor rock samples and high precision determination using thermal ionization mass spectrometry |
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| LI Chao-feng,LI Xian-hua,GUO Jing-hui,LI Xiang-hui,LI Huai-kun,ZHOU Hong-ying , LI Guo-zhan .State Key Laboratory of Lithospheric Evolution.Single-step separation of Rb-Sr and Pb from minor rock samples and high precision determination using thermal ionization mass spectrometry[J].Geochimica,2011(5):399-406. |
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| Authors: | LI Chao-feng LI Xian-hua GUO Jing-hui LI Xiang-hui LI Huai-kun ZHOU Hong-ying LI Guo-zhan State Key Laboratory of Lithospheric Evolution |
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| Institution: | LI Chao-feng1,2*,LI Xian-hua1,GUO Jing-hui1,LI Xiang-hui1,LI Huai-kun3,ZHOU Hong-ying3 and LI Guo-zhan3 1.State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,3.Tianjin Institute of Geology and Mineral Resources,Tianjin 300170 |
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| Abstract: | A single-step method for Rb-Sr and Pb separation from geological samples,employing mini-column containing 30 μL of Sr SpecTM resin is presented.It takes only 3 hours and consumes 0.75 mL reagent,yielding ideal recoveries of Rb-Sr and Pb(≥90%).The chemical procedure blanks are lower than 5 pg for Rb-Sr and 50 pg for Pb.This method shows prominent merits in sample consuming,procedure blank and separation efficiency.The method combined with high sensitive TIMS analytical technique is completely satisfied to high precision determination of Rb-Sr and Pb for minor samples,showing crucial application value especially for precious samples,such as lunar rocks,meteorites,fossil and so on. |
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| Keywords: | separation of Rb Sr and Pb Sr SpecTM resin TIMS |
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