岩矿测试2011，Vol.30Issue(6)：737-744,8.
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
Quantification of Multi Elements in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry with Pressurized Decomposition-Hydrochloric Acid Extraction
摘要
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 sediments can be accurately determined by this improved method. Sample weight was increased from 25 mg to 100m and digestion time was extended from 12 h to 48 h,which effectively resolved the problems including the representation of the samples and inadequate results for Rb, Sr, REEs and other elements dissolved by HN03. The results of many experiments showed that the 44 elements measured were consistent with standard values except for As and V elements, according to Cl interference in ICP-MS. Detection limits of the improved method were 0. 01 -0. 85 μg/g, with a precision RSD( n = 10 ) of 0. 73% -13. 1% and an accuracy RE( n = 10 )of less than 10%. The improved method is accurate, reliable and suitable for avariety of different types of geological samples.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Key words
pressurized decomposition-hydrochloric acid extraction/ inductively coupled plasma-mass spectrometry/ quantification of multi elements/ geological samples引用本文复制引用
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):737-744,8.基金项目
国家地质实验测试中心基本科研业务费项目(121235068101842) （121235068101842）
国土资源地质大调查项目(1212011120272) （1212011120272）
