火焰原子吸收光谱法测定山药中微量元素含量

Determination of Trace Elements Content in Dioscoreae Rhizoma by Flame Atomic Absorption Spectrometric

摘要:

目的: 使用火焰原子吸收光谱法测定山药药材中微量元素含量。 方法: 利用浓硝酸-高氯酸(4∶1)混合溶液进行样品消解,采用火焰原子吸收光谱法对6种不同来源的山药样品中Mn、Fe、Cu、 Zn、Mg元素含量进行了测定。 结果: 山药药材中富含微量元素,其含量高低依次为Mg>Fe>Cu >Zn>Mn。5种元素含量测定方法的回收率在95.50%~103.50%。 结论: 该方法灵敏、快速、稳定,可供山药微量元素含量测定。

Abstract:

Objective:Use flame atomic absorption spectrometric method for the determination of trace elements content in Dioscoreae Rhizoma. Method: Six Dioscoreae Rhizoma samples of six different sources were purchased and the mixed solution of HNO₃ and HClO₄ (4∶1)was used to digest the sample of Dioscoreae Rhizoma. The content of Mn, Fe, Cu, Zn, Mg, in the sample solution was determined by FAAS. Result: Dioscoreae Rhizoma medicinal materials contain trace elements, its content from high to low was Mg>Fe>Cu>Zn>Mn. The recovery rate of this method was 95.50%-103.50%. Conclusion: The method is sensitive, rapid, stable, and can be used for determination of trace elements in Dioscoreae Rhizoma.