Analysis of Micro Selenium Pharmacological Constitiuents in Natural Plants

The determinated technique of HG-AFS of micro selenium of pharmacological constituents in natural plants is studied.Samples are digested by mix acids(HNO 3-HClO 4 4∶1). The interference can be overcome by added acid concentration and added marsing agrent.The detection limit of selenium is 154×10 -4 μg·ml -1 and relative standard deviation is lower than 5%. The recovery is 976%～1014%。