彝药翻白草中微量元素含量的测定

Determination of Trace Elements in Potentilla discolor Bge

[目的]测定彝药翻白草中微量元素的含量,为其开发利用提供依据。[方法]先用浓硝酸微波消解翻白草样品,然后用火焰原子吸收光谱法测定翻白草中Fe、Cu、Zn、Mn、Ca和Mg 6种元素的含量。[结果]翻白草中含有丰富的人体必需微量元素,该方法的线性关系良好(R=0.995 7～0.998 2),平均回收率在96.4%～107%(n=8),RSD在1.9%～5.5%(n=8)。[结论]该方法简单、准确,可用于彝药翻白草中多种元素的连续测定。

[ Objective ] To determine the contents of trace elements in Potentilla discolor Bge of traditional Yi medicine, so as to provide refer- ences for the development and application of P. discolor. [ Method ] P. discolor sample was digested by microwave with concentrated nitric acid. Then, Fe, Cu, Zn, Mn, Ca and Mg contents in P. discolor sample were detected by FAAS. [ Result] P. discolor was rich in various essential trace elements for human body. This method had good linear relationship （ R = 0. 995 7 - 0. 998 2 ） ; the average recovery rate was 96.4% - 107% （n = 8） ; and RSD was 1.9% - 5.5% （ n = 8）. [ Conclusion] This method was simple and accurate and could be used for the continuous detection of many elements in P. discolor.