微波消解-原子荧光法测定不同种类中药中的痕量汞  

Determination of Trace Mercury in Different Sorts of Chinese Herbs by Atomic Fluorescence Spectrometry with Microwave Digestion

作　　者：刘春涛[1] 侯海鸽[1] 杨景林[1] 李里[1] 李寒辉[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《光谱学与光谱分析》2009年第11期3144-3146,共3页Spectroscopy and Spectral Analysis

基　　金：科技部国家"十五"重大科技攻关项目(2001BA701A57);黑龙江省青年科学技术专项资金项目(QC06C047)资助

摘　　要：针对不同种类的中药样品,采取不同的微波消解程序,建立了氢化物发生-原子荧光法测定中药中痕量汞的分析方法。在最佳工作条件下,线性方程为IF=809.1X-3.3275,相关系数r=0.999998,线性范围为0～80ng·mL-1,仪器检出限为0.014ng·mL-1(n=11),RSD为2.03%。样品回收率为96.8%～102.80%(n=6),方法检出限为1.17ng.g-1。对于不同种类的中药样品,分别选择大米(GBW08508)、杨树叶(GBW07604)、贻贝(GBW08571)国家标准物质,对方法的准确度进行了验证。实验结果表明,该方法简便灵敏、快速准确,应用于29种不同种类的中药中汞的测定,结果令人满意。A method for the determination of trace mercury in different sorts of Chinese herbs using hydride generation atomic fluorescence spectrometry under different microwave digestion conditions was developed. Under the optimized experimental conditions,the linear equation was IF=809.1X-3.327 5,the correlation coefficient was 0.999 998,and the linear range for mercury was 0-80 ng·mL^-1. The detection limit of mercury was 0.014 ng·mL^-1（n=11） and the relative standard deviation was 2.03%. The recoveries for these samples were 96.8%-102.80% （n=6） while the detection limit of the method was 1.17 ng·g^-1. The method＇s accuracy and precision for different sorts of Chinese herbs using the standard reference standard substance of rice （GBW08508）,poplar leaf （GBW07601）,and mytilus edulis （GBW08571） was checked,and the results were found to be basically consistent with the reference values. This method has been proved to be sensitive,simple and rapid with satisfactory results.

关 键 词：原子荧光法 微波消解 中药 痕量汞 

分 类 号：O657.3[理学—分析化学]