Speciation Analysis of Mercury in Traditional Chinese Medicine by Vapor-Generation Atomic Fluorescence Spectrometry
YANG Li-li1, LI Na2, ZHANG De-qiang3*, GAO Li-rong2，KANG Hai-yan2
1. College of Chemistry, Hebei Normal University, Shijiazhuang 050016, China 2. College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China 3. Hebei Academy of Sciences, Shijiazhuang 050081, China
Abstract：A sensitive method has been proposed for the determination of inorganic mercury and total organic mercury in traditional Chinese medicine(Wanshi Niuhuang Qingxin) by vapor-generation atomic fluorescence spectrometry. The experimental conditions that influence the atomic fluorescence signal intensity of Hg and the oxidization of organic mercury were investigated and optimized. Thiourea citric acid was selected as a sensitization agent, which greatly enhanced atomic fluorescence signal intensity of mercury. The influence of foreign ions and their elimination were studied. The detection limit of the method for Hg was 7.6 ng·L-1 and the relative standard deviation was 1.56%-3.28% for Hg. The proposed method was successfully applied to the determination of mercury speciation in real samples with a recovery range of 90.3%-110.3%.
Key words：Vapor-generation atomic fluorescence spectrometry;Traditional Chinese medicine;Mercury;Speciation analysis
杨莉丽1，李 娜2，张德强3*，高丽荣2，康海彦2 . 蒸气发生-原子荧光光谱法测定中草药中不同形态的汞[J]. 光谱学与光谱分析, 2005, 25(02): 286-289.
YANG Li-li1, LI Na2, ZHANG De-qiang3*, GAO Li-rong2，KANG Hai-yan2 . Speciation Analysis of Mercury in Traditional Chinese Medicine by Vapor-Generation Atomic Fluorescence Spectrometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(02): 286-289.
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