微波消解-CTAB增敏-HG-ICP-AES法测定中药黄芪中的痕量铅  

Determination of Trace Lead in Traditional Chinese Herbal Medicine Astragalus by Microwave Digestion-CTAB Enhancing-Continual Flow Ingection Hydride Generation-ICP-AES

作　　者：刘冬莲[1] 客绍英[1] 叶荣[2] 丁明玉[3] 

机构地区：[1]唐山师范学院化学系,河北唐山063000 [2]中国地质大学地学院,北京100083 [3]清华大学化学系,北京100084

出　　处：《光谱学与光谱分析》2007年第11期2337-2340,共4页Spectroscopy and Spectral Analysis

基　　金：河北省科技攻关项目(05276416);唐山市科技局项目(04360701B-12)资助

摘　　要：采用微波消解技术处理样品,建立了CTAB增敏-氢化物发生-电感耦合等离子体发射光谱法(HG-ICP-AES)测定中药黄芪中痕量铅的分析方法。讨论了微波消解试剂、微波消解参数对消解效果的影响,系统地研究了氢化物发生的最佳条件。采用HNO3+H2O2+H2O为微波消解最佳试剂,在选定的最佳氢化物发生条件下,铅的线性范围为0.23～800μg·L-1,相关系数为0.9999,检出限为0.23μg·L-1,相对标准偏差为1.02%,样品加标回收率为98.8%～100.1%。结果表明,微波消解法处理中草药,具有快速、简便、节省试剂、消解完全等特点,测定结果的精密度和准确度令人满意。A new method using microwave digestion technique was developed for the determination of lead in Astragalus by CTAB enhancing-continual flow hydride generation-inductively coupled plasma atomic emission spectrometry（HG-ICP-AES）. The experimental conditions of microwave digestion and hydride generation were optimized. This method shows a linear range of 0.23-800 μg·L^-1 and the correlation coefficient is 0. 999 9. It is satisfactory to apply the microwave digestion procedure to the determination of Pb under the optimized conditions. The detection limit of the method is 0. 23 μg·L^-1 and the RSD is 1.02%. The recovery obtained is 98. 8%-100. 1%. The results show that this method is rapid and simple with low environmental contamination and complete digestion of samples.

关 键 词：微波消解 氢化物发生 ICP-AES 铅 CTAB 黄芪 

分 类 号：O657.3[理学—分析化学]