火焰原子吸收光谱法测定连翘中微量元素的含量

Determination of Trace Elements in Fructus Forsythiae by Flame Atomic Absorption Spectrophotometr (FAAS)

摘要:

目的: 建立连翘中多种微量元素的含量测定方法。 方法: 采用浓HNO₃-HClO₄(4:1)为消解剂进行湿法消解,应用火焰原子吸收光谱法测定连翘中微量元素Cu,Zn,Mn,Fe,Ca,Mg,K,Na的含量。 结果: 各元素方法线性关系良好,相关系数均>0.990 6;重复性试验(n=6)RSD 1.59%~2.98%;加样回收率(n=6)96.2%~106.6%,RSD 1.4%~3.9%。 结论: 该方法简单、准确、灵敏,为连翘中微量元素的测定提供了一种可靠方法。

Abstract:

Objective:To develop a method of determination of trace elements in Fructus Forsythiae. Method: The content of Cu, Zn, Mn, Fe, Ca, Mg, K, Na in Fructus Forsythiae was directly determined by flame atomic absorption spectrophotometry after digestion with HNO₃-HClO₄(4:1) at heating and normal pressure. Result: All calibration curves showed good linearity (r>0.990 6). The RSD (n=6) of reproducibility was between 1.59% and 2.98%. The recoveries (n=6) were from 96.2% to 106.6%. The RSD (n=6) of recovery was between 1.4% and 3.9%. Conclusion: The method was simple, accurate and sensitivity. It is a reliable method for the determination of the trace elements in Fructus Forsythiae.