高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (1): 55.

• 研究简报 • 上一篇    下一篇

电感耦合等离子体质谱测定地质样品中Pb同位素比值

胡圣虹1, 杨薇2, 帅琴2, 刘勇胜1, 林守麟2, 高山1   

  1. 1. 中国地质大学地球科学学院, 武汉 430074;
    2. 中国地质大学材料科学与化学工程学院, 武汉 430074
  • 收稿日期:2002-01-22 出版日期:2003-01-24 发布日期:2003-01-24
  • 通讯作者: 胡圣虹(1964年出生),男,博士,副教授,主要从事ICP2M S及其联用技术研究.E-mail:shhu@cug.edu.cn E-mail:shhu@cug.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:49973026);国家自然科学基金重点项目(批准号:40133020)资助

Determination of Lead Isotope Ratios in Geological Samples by Inductively Coupled Plasma Mass Spectrometry

HU Sheng-Hong1, YANG Wei2, SHUAI Qin2, LIU Yong-Sheng1, LIN Shou-Lin2, GAO Shan1   

  1. 1. Faculty of Earth Sciences;
    2. Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China
  • Received:2002-01-22 Online:2003-01-24 Published:2003-01-24

关键词: 电感耦合等离子体质谱, 铅, 同位素, 地质样品

Abstract: A simple and precise method for direct determination of molar ratio of 206Pb/ 204Pb, 207Pb/ 204Pb and 208Pb/ 204Pb by ICP-MS was developed. The data acquirement parameters of MS for Quadrupole setting time(QST), Dwell time(DT), Integrated time and number of sweeps were investigated in detail. The relative standard deviation(RSD) of different Pb isotope ratios were less than 0.32%[n=5, ρ(Pb)=20 ng/mL]. The mass discrimination and dead time of detector was calibrated by using NIST981 solution. The mass bias factor(α) of 206Pb/ 204Pb, 207Pb/ 204Pb and 208Pb/ 204Pb were 0.002 5, 0.002 9 and 0.002 0, respectively. The dead time of detector was 7 ns. The proposed method has been applied to the analysis of geological standard reference materials containing AGV-1, BCR-2 and BHVO-2 .The relative error between this work and the recommend values or reported values was better than 0.73% and the relative standard deviation was better than 0.93%(n=5).

Key words: Inductively coupled plasma mass spectrometry(ICP-MS), Lead, Isotope ratio, Geological sample

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