Determination of Total Mercury and Ionic Mercury in Artificial Gastric Juice of Tibetan Medicine Dangzuo by GAE-AFS
LI Cen1,2,3, YANG Hong-xia1,2,3, WEI Li-xin1,2*, DU Yu-zhi1,2, ZHANG Guo-ying1,2,3
1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China 2. Qinghai Province Key Laboratory of Tibetan Medicine Pharmacology and Safety Assess，Xining 810008, China 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：The mercury in Tibetan medicine has become important focus in the research on medicine safety evaluation. The total mercury and the ionic mercury in artificial gastric juice of Tibetan medicine Dangzuo were detected by Gold Amalgam Enrichment-Atomic Fluorescence Spectrometry (GAE-AFS). In the present study, Tibetan medicine Dangzuo was prepared by H2SO4-KNO3 digestion system and artificial gastric juice. The established method and condition of instrument were investigated. Under the optimum experimental conditions and instrumental operation parameters, the recovery(n=6)of HgS is 99.56 % (RSD=1.94%), the limit of detection for mercury is 0.2 ng·L-1, the linear range is 0～500 ng·L-1，and r=0.999 9. Then, the total mercury and the ionic mercury in artificial gastric juice in Dangzuo samples from different Tibetan regions were assayed. The result showed that the ranges of total mercury and ionic mercury in artificial gastric juice were 3.998 0～16.735 8 mg·g-1 and 45.537 7～1 033.985 0 ng·g-1, respectively. The analytical method mentioned above is rapid and accurate for determining the amount of mercury in Tibetan medicine Dangzuo.
Key words：Atomic fluorescence spectrometry;Gold amalgam enrichment;Dangzuo;gTSo thal;Hg;Artificial gastric juice
李 岑1,2,3，杨红霞1,2,3，魏立新1,2*，杜玉枝1,2，张国英1,2,3 . GAE-AFS法分析藏药当佐中总汞与人工胃液中的游离态汞[J]. 光谱学与光谱分析, 2011, 31(07): 1950-1953.
LI Cen1,2,3, YANG Hong-xia1,2,3, WEI Li-xin1,2*, DU Yu-zhi1,2, ZHANG Guo-ying1,2,3 . Determination of Total Mercury and Ionic Mercury in Artificial Gastric Juice of Tibetan Medicine Dangzuo by GAE-AFS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(07): 1950-1953.
