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封闭压力酸溶-盐酸提取-电感耦合等离子体质谱法测定地质样品中的多元素
引用本文:张保科,温宏利,王蕾,马生凤,巩爱华.封闭压力酸溶-盐酸提取-电感耦合等离子体质谱法测定地质样品中的多元素[J].岩矿测试,2011,30(6):737-744.
作者姓名:张保科  温宏利  王蕾  马生凤  巩爱华
作者单位:国家地质实验测试中心,北京,100037
基金项目:国家地质实验测试中心基本科研业务费项目(121235068101842); 国土资源地质大调查项目(1212011120272)
摘    要:高温、高压封闭压力酸溶可有效分解岩石、土壤、沉积物等地质样品,采用电感耦合等离子体质谱法(ICP-MS)进行测定,大部分元素可得到满意的回收率;但Zr、Hf、REEs、Rb、Th、U等元素用硝酸复溶困难,测定结果不准确。本文对传统的封闭压力酸溶方法进行改进,用盐酸复溶提取代替硝酸复溶提取,ICP-MS法测定岩石、土壤、沉积物等国家一级标准物质中Li、Be、Cr、Mn、Co、Ni、Cu、Zn、Ga、Rb、Sr、Mo、Cd、In、Cs、Ba、Ti、Zr、Nb、Sn、Sb、W、Hf、Ta、Tl、Pb、Bi、Th、U以及稀土元素(REEs)等46个元素。将原方法中的称样量25 mg加大至100 mg,溶样时间由12 h延长至48 h,有效地解决了取样代表性及HNO3复溶提取时Rb、Sr、REEs等元素测定结果偏低的问题。分析结果表明,除元素As和V在电感耦合等离子体质谱测定中存在Cl的干扰不能准确测定之外,其他44个元素的测定值与标准值基本一致。改进后的方法测定下限为0.01~0.85μg/g,精密度(RSD,n=10)为0.73%~13.1%,准确度小于<10%。方法准确、可靠,适用于各种不同种类地质样品的分析。

关 键 词:密封酸溶-盐酸提取  电感耦合等离子体质谱法  多元素测定  地质样品
收稿时间:2010/8/27 0:00:00

Quantification of Multi Elements in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry with Pressurized Decomposition-Hydrochloric Acid Extraction
ZHANG Bao-ke,WEN Hong-li,WANG Lei,MA Sheng-feng and GONG Ai-hua.Quantification of Multi Elements in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry with Pressurized Decomposition-Hydrochloric Acid Extraction[J].Rock and Mineral Analysis,2011,30(6):737-744.
Authors:ZHANG Bao-ke  WEN Hong-li  WANG Lei  MA Sheng-feng and GONG Ai-hua
Institution:ZHANG Bao-ke,WEN Hong-li,WANG Lei,MA Sheng-feng,GONG Ai-hua(National Research Center for Geoanalysis,Beijing 100037,China)
Abstract:Rock,soil,sediments and other geological samples can be effectively decomposed by acid under high temperature and pressure,and be measured by Inductively Coupled Plasma-Mass Spectrometry(ICP-MS).The recoveries of most elements were satisfactory,except for the results of Zr,Hf,REEs,Rb,Th,and U.In this paper,the traditional pressurized acid digestion method has been improved as the sample was extracted by hydrochloric acid instead of nitric acid.46 elements in the National Standard Materials of rock,soil and ...
Keywords:pressurized decomposition-hydrochloric acid extraction  inductively coupled plasma-mass spectrometry  quantification of multi elements  geological samples  
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