微波消解-火焰原子吸收光谱法测定杜仲中微量元素含量

Determination of Trace Elements in Eucommia ulmoides Oliv. by Combining Microwave Digestion with Flame Atomic Absorption Spectrometry

[目的]测定杜仲中微量元素的含量。[方法]采用微波消解-火焰原子吸收光谱法测定杜仲皮和叶中Zn、Cu、Ca、Mg 4种微量元素的含量。[结果]4种微量元素的回收率在97%~100.9%之间,RSD值≤3.5%。杜仲皮与叶中Zn、Cu、Ca、Mg等微量元素含量有显著差异,降压效果也有显著差异。[结论]该方法具有准确、快速和方便等特点。

[Objective] To determine the contents of 4 trace elements in Eucommia ulmoides Oliv..[Method] 4 trace elements including Zn,Cu,Ca and Mg in leaves and barks of Eucommia ulmoides Oliv.were determined by combining microwave-assisted sample digestion with flame atomic absorption spectrometry.[Results] The recovery rates of 4 trace elements ranged from 97% to 100.9% with all RSD value being less than 3.5%.There were significant differences in contents of Zn,Cu,Ca and Mg and antihypertensive effects between barks and leaves of Eucommia ulmoides Oliv..[Conclusion] The method was accurate,fast and convenient.