高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (9): 1688.

• 研究论文 • 上一篇    下一篇

同位素稀释电感耦合等离子体质谱(ID-ICP-MS)测定植物与人发标准物质中的铅

杨朝勇, 黄志勇, 赵丽, 庄峙厦, 王小如   

  1. 厦门大学化学系现代分析科学教育部重点实验室, 厦门 361005
  • 收稿日期:2001-05-14 出版日期:2002-09-24 发布日期:2002-09-24
  • 通讯作者: 王小如(1949年生),女,博士,教授,博士生导师,从事原子光谱及质谱研究.
  • 基金资助:

    国家自然科学基金重点项目(批准号:29735160);国家科技部攻关项目(批准号:99-929-02-13);福建省卫生厅重大项目(批准号:2000F001)资助

Isotope Dilution Inductively Coupled Plasma Mass Spectrometery for the Determination of Lead in Plants and Human Hair

YANG Chao-Yong, HUANG Zhi-Yong, ZHAO Li, ZHUANG Zhi-Xia, WANG Xiao-Ru   

  1. Department of Chemistry, The Key Laboratory of Analytical Sciences of the Ministry of Education, Xiamen University, Xiamen 361005, China
  • Received:2001-05-14 Online:2002-09-24 Published:2002-09-24

摘要: 建立了同位素稀释电感耦合等离子体质谱(ID-ICP-MS)测定铅的方法.考察和讨论了仪器参数对同位素比值测定的影响,优化了仪器的数据采样参数.利用内标Tl对质量歧视、系统漂移进行了校正.讨论了同位素浓缩剂加入量对最终浓度测定值的不确定度的影响.将该方法应用于植物标准物质和人发标准物质的测定,结果令人满意.

关键词: 同位素稀释法, 电感耦合等离子体质谱,

Abstract: Amethod of isotope dilution inductively coupled plasma mass spectrometry for the determination of lead in plant and human hair samples is established. The effects of instrumental parameters on the isotope ratio measurement were studied and discussed. For the precise determination, the data acquisition parameters were optimized. Tl was used as internal standard for the correction of mass bias and system driftment. The propagation of uncertainty in ID-ICP-MS was discussed to optimize the amount of concentrated isotope spiked. The analytical results of lead in some certificate reference materials agree well with the certificated valuesl.

Key words: Isotope ratio dilution, Inductively coupled plasma mass spectrometry, Lead

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