高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 252.

• 研究论文 • 上一篇    下一篇

微量进样/ICP-MS体系中的基体效应研究

康建珍, 段太成, 郭鹏然, 王畅, 陈杭亭, 曾宪津   

  1. 中国科学院长春应用化学研究所电分析化学国家重点实验室, 国家电化学和光谱研究分析中心, 长春 130022
  • 收稿日期:2002-09-16 出版日期:2004-02-24 发布日期:2004-02-24
  • 通讯作者: 陈杭亭(1950年出生),男,博士,研究员,主要从事原子光谱分析研究.E-mail;htchen@ciac.jl.cn E-mail:htchen@ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号;20075029)资助

Matrix Effects of Micro-sampling System for Inductively Coupled Plasma Mass Spectrometry

KANG Jian-Zhen, DUAN Tai-Cheng, GUO Peng-Ran WANG Chang, CHEN Hang-Ting, ZENG Xian-Jin   

  1. State Key Laboratory of Electroanalytical Chemistry, National Analytical Research Center of Electrochemistry & Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2002-09-16 Online:2004-02-24 Published:2004-02-24

摘要: 考察了自行组装的高效微量进样系统在22μL/min低提升量下电感耦合等离子体质谱的基体效应.质量数和电离电位不同的基体元素质量浓度为2g/L时,低质量数分析元素受到一定的干扰,而对于高质量数分析元素,其信号几乎不受基体元素干扰,归一化信号值接近1.对于体积分数为5%的有机基体样品溶液,此微量高效雾化系统测得的归一化信号值多接近0.5.实际样品中常见的基体元素K,Na,Ca和Mg质量浓度低于500mg/L,以及乙醇和乙酸体积分数小于1%时,微量进样系统均不产生显著干扰.

关键词: 电感耦合等离子体质谱, 高效微量进样系统, 基体效应

Abstract: Matrix effects of inductively coupled plasma mass spectrometry(ICP-MS) with the self-installed micro-sampling system at 22 μL/min of solution uptake rate were studied. In the presence of 2 g/L matrix elements with different masses or ionization potentials, the signal intensity of analyzed elements was measured. For light analyzed elements, the interferences were observed; while for high mass analyte elements, the normalized intensity was close to 1. In the presence of 5% organic matrix, the normalized intensity was near to 0 5. When common elements such as K, Na, Ca, Mg at 500 mg/L or 1% organic solvents such as ethanol and acetic acid existed in the solution, the signals of analyzed elements were almost not affected. The results show that the micro-sampling system has a good capability of anti-interference to matrixes.

Key words: Inductively coupled plasma mass spectrometry, High effective micro-sampling system, Matrix effects

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