秦巴山区益母草中几种微量元素含量分析

Determination of trace elements in Leonurus Helerophyllus Sweet from QinBa mountain area by FAAS

采用微波消解系统处理益母草样品，并使用火焰原子吸收光谱法（FAAS）测定了秦巴山区益母草中Fe、Mn、Cu、Ni、Zn等5种无机元素的含量。结果表明：微波消解时间短，操作简单，节省试剂，环境污染少，加标回收率均在99．6％～100．3％范围内，相对标准偏差（RSD）均〈5％。益母草中这几种对人体健康非常有益的元素的含量都比较丰富，其含量由高到低的排列顺序为：Fe、Zn、Mn、Cu、Ni。

In this paper, closed microwave digestion and flame atomic absorption spectrophotometry （FAAS） were employed to determine the five inorganic microelements in Leonurus Helerophyllus Sweet from QinBa Mountainous Area, Fe, Mn, Cu, Ni and Zn. The result showed that content of the element is Fe〉 Zn〉 Mn 〉 Cu 〉 Ni, and the recoveries are within 99.6 % - 100.3 %. The method has the advantages of highly effective, simple, environmentfriendly, reagents- saving and the digesting speedy.