火焰原子吸收法测定不同产地冻干地黄中微量元素的含量

Determination of trace elements in freeze-dried rehmannia from different habitats by FAAS

目的：建立不同产地10批冻干地黄中8种微量元素含量的测定方法。方法：用浓HNO_3-HClO_4（4∶1）消解样品,应用火焰原子吸收法测定不同产地冻干地黄中微量元素K、Mg、Ca、Na、Mn、Fe、Cu和Zn的含量。结果：回收率在95.4%~103.5%之间,样品RSD为2.0%~4.2%。结论：该方法简单、准确,结果令人满意。

Objective：To develop a method of eight trace elements in freeze-dried rehmannia from different habitats. Methods：The contents of K,Mg,Ca,Na,Mn,Fe,Cu,Zn in rehmannia from different habitats were directly determined by FAAS after pretreated with HNO3-HCLO4. Results：The recoveries were between 95.4% and 103.5%. The RSD of recovery was between 2.0% and 4.2%. Conclusion：The result measured by this method is considered to be accurate.