火焰原子吸收光谱法测定五倍子中的微量元素含量

Determination of Trace elements in Galla chinensis by Flame Atomic Absorption Spectrometry

目的：采用火焰原子吸收光谱测定五倍子中钙、镁、铁、铜、锰、锌6种微量元素的含量。方法：采用硝酸-高氯酸常压250℃条件下消解样品,并进行了方法的准确性和精密度考察。结果：对于所测元素,工作曲线的相关系数r〉0.998 2,回收率96.0%～109.8%,RSD〈4.70%。五倍子中上述6种元素的含量由高到低依次是钙,镁,铁,锌,锰,铜。结论：五倍子中含有较丰富的钙,镁,铁,锌,锰,铜元素。所得数据可为五倍子药物的进一步研究和综合开发利用提供新的科学依据。

Object：In this paper,the content of Ca,Mg,Fe,Cu,Mn and Zn trace elements in Galla chinensis had been determined by flame Atomic Absorption Spectrometry.Method：FAAS was used to determine the contents of Ca,Mg,Zn,Cu,Fe,Mn,Cr,Ni in the Galla chinensis.The samples were digested with HNO3-HClO4 at 250 ℃ under normal pressure.In the meantime,the accuracy and precision on the results were studied.Results：For all of the analyzed metals,the correlative coefficient of the calibration curves was over 0.998 2.The recovery was 96.0%～109.8% with RSD of less 4.70%.The concentration order of trace elements in Galla chinensis is：CaMgFeZnMnCu.Conclusion：The results showed that there were relatively rich Ca,Mg,Fe,Zn,Mn,Cu in Galla chinensis.The data provides the new scientific evidences for the further studies and comprehensive utilization of Galla chinensis.