Spectroscopy and Spectral Analysis, Volume. 31, Issue 7, 1950(2011)
Determination of Total Mercury and Ionic Mercury in Artificial Gastric Juice of Tibetan Medicine Dangzuo by GAE-AFS
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.
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LI Cen, YANG Hong-xia, WEI Li-xin, DU Yu-zhi, ZHANG Guo-ying. Determination of Total Mercury and Ionic Mercury in Artificial Gastric Juice of Tibetan Medicine Dangzuo by GAE-AFS[J]. Spectroscopy and Spectral Analysis, 2011, 31(7): 1950
Received: Oct. 24, 2010
Accepted: --
Published Online: Aug. 29, 2011
The Author Email: Cen LI (licen_601@126.com)