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    高精度测量岩石样品Ce同位素组成的TIMS方法

    杨红梅 凌文黎 段桂玲

    杨红梅, 凌文黎, 段桂玲, 2009. 高精度测量岩石样品Ce同位素组成的TIMS方法. 地球科学, 34(6): 939-945.
    引用本文: 杨红梅, 凌文黎, 段桂玲, 2009. 高精度测量岩石样品Ce同位素组成的TIMS方法. 地球科学, 34(6): 939-945.
    YANG Hong-mei, LING Wen-li, DUAN Gui-ling, 2009. Precious Ce Isotope Analysis of Rock Samples by TIMS Method. Earth Science, 34(6): 939-945.
    Citation: YANG Hong-mei, LING Wen-li, DUAN Gui-ling, 2009. Precious Ce Isotope Analysis of Rock Samples by TIMS Method. Earth Science, 34(6): 939-945.

    高精度测量岩石样品Ce同位素组成的TIMS方法

    基金项目: 

    中国地质调查局地质调查测试新技术新方法研究 200120190099-03

    详细信息
      作者简介:

      杨红梅(1976—),女,助研,博士,主要从事同位素地球化学方面的研究.E-mail:ycyanghmei@163.com

    • 中图分类号: P599

    Precious Ce Isotope Analysis of Rock Samples by TIMS Method

    • 摘要: 介绍了对岩石样品的Ce同位素组成进行高精度测量的TIMS方法.采用α-羟基异丁酸(α-HIBA) 离子交换法分离和纯化岩石样品中的La、Ce元素, Ce同位素组成和La、Ce含量测定在Triton热电离质谱仪上完成.质谱标样JMC304的138Ce/142Ce比值统计值为0.0225762±0.0000015, 与大部分文献值一致.应用该方法对USGS玄武岩标样BCR-2和峨眉山玄武岩EQB的138Ce/142Ce比值和La、Ce含量进行了分析, 其结果分别为: 0.0225572±0.0000010、25.2±0.3μg/g、55.8±0.9μg/g和0.0225755±0.0000003、54.2±0.4μg/g、117.4±1.3μg/g.BCR-2的La、Ce含量测定结果与其证书值在误差范围内一致, 其分析精度为0.001%~0.005%.所有样品的140Ce/142Ce比值测定结果统计值为7.9439±0.0002, 介于文献最低值7.941与最高值7.947之间, 可能代表了该比值的最佳估计值.

       

    • 图  1  峨眉山玄武岩和JMC304的140Ce/142Ce比值测定值

      Fig.  1.  A scattering plot of140Ce/142Ce ratios for the standards of Emeishan basalt and JMC304

      表  1  La-Ce元素化学分离流程

      Table  1.   Chemical procedure of separation and purification for La and Ce

      表  2  CeO+离子比值测定所用的杯结构

      Table  2.   Cup configuration for Ce isotopic analysis in CeO+ ion form

      表  3  JMC304标样Ce同位素分析结果及其与文献值对比

      Table  3.   Ce isotope analysis result of JMC304 and its comparison with the data from literatures

      表  4  USGS标样BCR-2和峨眉山玄武岩La-Ce同位素组成分析结果

      Table  4.   La-Ce isotopic compositions of USGS BCR-2 and Emeishan basalt standards

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    出版历程
    • 收稿日期:  2008-09-25
    • 刊出日期:  2009-11-25

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