ICP-OES法测定化探样品中多元素的研究及应用

电感耦合等离子体发射光谱法（ICP-ＯES）具有分析速度快、准确度高及多元素同时测定的特性，近年来被广泛应用于地质实验室各类样品的分析。本次工作采用硝酸―氢氟酸―高氯酸消解样品，在5%（体积分数）的王水介质中，用电感耦合等离子体发射光谱法测定土壤、水系沉积物样品中主量、次量和微量元素。通过改进溶样方法、筛选分析谱线、设置背景扣除位置及优化仪器工作参数等，提高了分析准确度和精密度。经国家一级标准物质分析验证，测定值与标准值吻合，结果准确可靠，精密度（RSD，n=11）＜5%。该方法样品处理程序简单快速，试剂用量少，线性范围宽，分析重现性好，能够满足基体组成复杂的区域地球化学调查样品分析的要求，将该方法应用于青海省矿产资源调查评价项目土壤及水系沉积物样品的分析取得了良好的效果。

Research and Application of Multi-elements Determination in Geochemical Samples by Inductively Coupled Plasma-Optical Emission Spectrometry

ICP-OES has been widely used in all kinds of sample has the characteristics of rapid determination, high accuracy and analysis in geological laboratory,because the method multi-element simultaneous determination.This work uses HNO3-HF-HClO4 digestion sample to determine the major,minor and trace elements of soil samples and stream sediment samples by ICP-OES in 5% regia solution.The accuracy and precision are improved by improving dissolving method,selecting analysis spectral line,setting background deduction locationand optimizing instrument operating parameters.Through analysis and verification of national standard substance,the measured values are consistent with the standard and the precision is less than 5%.The method is simple and rapid processing,having the advantages of less reagent consumption,wide linear range,good analysis reproducible and meet analysis requirements of regional geochemical survey samples of complex matrix composition.The method was applied to the analysis of soil and stream sediment samples of Qinghai Province and achieved remarkable results.