微波溶样ICP-AES法测定甘肃东紫苏中的无机元素

Determination of Inorganic Elements in Elsholtzia bodinieri Vaniot from Gansu by Microwave Digestion ICP-AES

将正交试验和方差分析应用于微波溶样ICP-AES法测定东紫苏地上部分K，Na，Ca，Ba，Pb，Zn，Mn，Cu，Mg，Fe和Al等无机元素的分析中，此方法简单、快速、灵敏度高、准确性好，且多种元索可同时测定，该方法的加标回收率为93．2％～104．1％，RSD（n=5）〈3．20%。结果表明：东紫苏中含有丰富的对人体有益的微量元素，此结果可为探讨东紫苏中元素含量与其药效的相关性提供理论依据。

In the present paper, orthogonal test and square error analysis were applied to the determination of inorganic elements in the aerial part of E. bodinieri V. such as K, Na, Ca, Ba, Pb, Zn, Mn, Cu, Mg, Fe and Al by microwave digestion ICP-AES technique. The method is simple, rapid, and features of high sensitivity, good accuracy and simultaneous determination of many elements. Its recovery ratio obtained by standard addition method ranged from 93. 2% to 104. 1%, and its RSD （n= 5） was lower than 3.20%. The results showed that this plant has rich inorganic elements, which are essential to human health. The result provides a theoretical basis for investigating the correlation of element content and the effect of medicine in E. bodinieri V.