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《National Medical Frontiers of China》 2011-20
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Determination of bismuth in Chinese Medicinal Herbs by Hydride Generation-Atomic Fluorescence Spectrometry with Microwave Digestion

Liu Gui-ying,Cheng li.Department of Sanitary Chemistry,School of Public Health,Shanxi Medical University,Taiyuan 030001,China  
Objective To establish a method for determination of bismuth in Chinese herbal medicine by hydride generation–atomic fluorescence spectrometry with microwave digestion.Methods After pretreatment with HNO3+H2O2 by microwave digestion system,bismuth in Chinese herbal medicine was determined by hydride generation–atomic fluorescence spectrometry.The sample pretreatment and instrumental operation parameters were optimized.Results Wide linear relationship was achieved in the range of 2.0-40.0μg/L with relative coefficient of 0.9999 and the detection limit was 0.208μg/L with the relative standard deviation(RSD) of 2.86% for bismuth.The content of bismuth in the standard reference substance tea(GBW07605) was in good agreement with certified value according to this way.The recovery of samples were in the range of 87.9%-93.0% and the relative standard deviation(RSD) were 3.2%-8.3% for bismuth.Conclusion This method for the determination of bismuth in Chinese herbal medicine is simple,rapid,sensitive,accurate and easy to use.
【CateGory Index】: R284
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