Determination of Trace Lead in Traditional Chinese Herbal Medicine Astragalus by Microwave Digestion-CTAB Enhancing-Continual Flow Ingection Hydride Generation-ICP-AES
LIU Dong-lian1,2,KE Shao-ying1,YE Rong2,DING Ming-yu3
1. Department of Chemistry, Tangshan Teachers College, Tangshan 063000, China 2. Faculty of Geosciences, China University of Geosciences, Beijing 100083, China 3. Department of Chemistry, Tsinghua University, Beijing 100084, China
Abstract: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-1and 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.
刘冬莲1,2,客绍英1,叶荣2,丁明玉3 . 微波消解-CTAB增敏-HG-ICP-AES法测定中药黄芪中的痕量铅[J]. 光谱学与光谱分析, 2007, 27(11): 2337-2340.
LIU Dong-lian1,2,KE Shao-ying1,YE Rong2,DING Ming-yu3. Determination of Trace Lead in Traditional Chinese Herbal Medicine Astragalus by Microwave Digestion-CTAB Enhancing-Continual Flow Ingection Hydride Generation-ICP-AES. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(11): 2337-2340.
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