ICP-AES法测定中草药毛两面针中微量金属元素的含量

用ICP-AES对广西金秀大瑶山产的两面针之亚种毛两面针的根,茎,叶中的20种金属元素进行了分析测定,该方法的加标回收率为89%～107.5%,精密度大部分都小于4%,具有良好的准确度和精密度.测定结果表明,不同部位中微量金属元素含量不同,K,Ca,Mg,Na四种人体必需的元素在毛两面针的根、茎、叶中含量最丰富,而Mn,Zn,Fe,Cu,Co,Sr和有害元素Cd,Cr,Pb,Bi等含量相对较少,Se,V,Mo,Hg四种元素在毛两面针中未被检测到.毛两面针中含有多种丰富的对人有益的金属元素,此结果为研究毛两面针中微量无机元素与药效的内在联系提供一定的依据,也为中草药的用剂用量提供了参考信息.

Determination of Trace Metal Elements in Zanthoxylum Nitidum by ICP-AES

The contents of twenty microelements were determined in the root, stem and leaf of traditional Chinese herbs, Zanthoxylumnitidum by ICP-AES (inductively coupled plasma-atomic emission spectrometry) analytical technology. For such method, their recovery ratio obtained by standard addition method ranged between 89% and 107. 5%, and most of RSDs were lower than 4%, with good correction and precision. The analytical results show that there exist different contents from the different parts of the plant. There are most rich elements such as Mg, Na, K, and Ca in its three parts, while Mn, Zn, Fe, Cu, Co, Sr and some toxic elements Cd, Cr, Pb and Bi were also detected; four elements, Se, V, Mo and Hg, were not detected in all parts. There exist many kinds of metal elements benefiting human being health, which may provide useful information for the usage of the herbs and for the study of the relationship between the elements in Chinese traditional medicine and its bioactivities.