地质样品中40个微量、痕量、超痕量元素的ICP-MS分析研究

胡圣虹; 陈爱芳; 林守麟; 袁洪林; 高山

地质样品中40个微量、痕量、超痕量元素的ICP-MS分析研究

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

基金项目:

国家自然科学基金项目 49973026

详细信息

作者简介:
胡圣虹, 男, 副教授, 1964年生, 1993年毕业于中国地质大学(武汉), 获分析化学硕士学位, 现主要从事ICP-MS分析技术研究工作

中图分类号: O657.63;P584
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出版历程
- 收稿日期: 1999-09-07
- 刊出日期: 2000-03-25

ICP-MS ANALYTICAL RESEARCH INTO 40 TRACE AND ULTRA-TRACE ELEMENTS IN GEOLOGICAL SAMPLES

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Material Sciences and Chemical Engineering, China University ofGeosciences, Wuhan 430074, China

摘要

摘要: 以基体匹配的混合标准溶液为外标校正溶液, 采用115In - 10 3 Rh双内标校正系统, 通过单个元素Ca, Cr, Ti, Ba, La, Ce, Pr的氧化物、氢氧化物产率的测定, 计算其等效干扰离子浓度, 并进行校正, 从而有效地抑制了分析信号的漂移、基体效应及多原子离子干扰.针对不同岩性的地质样品, 分别采用酸消解、碱熔融样品制备体系, 在POEMSⅢ上建立了等离子体质谱法同时测定微量、痕量、超痕量元素的分析方法.用于国际地质标样AGV - 1 (安山岩), BH VO - 2 (玄武岩), GSR - 3 (玄武岩), DNC - 1 (橄榄岩), RGM - 1 (流纹岩), G - 2 (花岗岩), JG- 2 (花岗岩) 的分析, 结果令人满意.
- 等离子体质谱 /
- 校正方法 /
- 微量、痕量、超痕量元素 /
- 地质样品
Abstract: The analytical method of major, trace and ultra-trace elements is applied to geological samples using ICP-MS. In order to minimize matrix effects of inter-elements, the matrix-matched calibration solutions were prepared, simulating the composition of natural rocksobtained from statistically-calculated average values of 20 geological samples. The resulting values are then normalized. Two separate internal standards of 115 In-103Rh are selected to compensate the drift of analytical signals. Polyatomic ion interference is calibrated by measuring the oxides(MO⁺)and hydroxides(MOH⁺)with individual element solution for the ratio of MO⁺/M⁺ and MOH⁺/M⁺ and the concentrations are then equivalently calculated. The proposed method is applied to the analysis of seven standard reference materials. For the most trace elements, the relative errors between this work and the recommend values are greater than 10% and the relative standard deviations are greater than 5%.
- ICPMS /
- calibration technology /
- trace and ultratrace elements /
- geological sample

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图 1 标准样品分析结果的相对标准偏差

Fig. 1. Relative standard deviation of analytical data for SRM

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图 2 标准样品分析结果与推荐值的相对误差

Fig. 2. Relative error of analytical data between this work and recommend values

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表 1 ICP-MS仪器工作参数

Table 1. Operation parameters for POEMS Ⅲ (ICP-MS)

表 2 基体匹配标准溶液

Table 2. Matrix-matched standard solutions

表 3 样品分析结果

Table 3. Analytical results of samples

参考文献(9)

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