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

被引：18

作者：

李潮峰 ^{[1
,2
]}

李献华 ^{[1
]}

郭敬辉 ^{[1
]}

李向辉 ^{[1
]}

李怀坤 ^{[3
]}

周红英 ^{[3
]}

李国占 ^{[3
]}

机构：

[1] 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

[2] 中国科学院研究生院

[3] 天津地质矿产研究所

来源：

地球化学 | 2011年 / 40卷 / 05期

关键词：

Rb-Sr-Pb分离; Sr特效树脂; 热电离质谱;

D O I：

10.19700/j.0379-1726.2011.05.001

中图分类号：

P575 [矿物的鉴定及分析];

学科分类号：

070901 ;

摘要：

采用30μL 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3 h,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-Sr和Pb同位素分析,对于珍贵样品如月岩、陨石和化石样品等具有重要应用价值。

引用

页码：399 / 406

页数：8

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