采用电感耦合等离子体质谱法测定采自甘肃、青海、四川和云南共计26批次的当归样品中37种无机元素的含量,并考察了重金属及有害元素的安全情况。以37种无机元素的实测值为变量,应用主成分分析确定当归中差异性特征元素;再以特征元素为变量进行层次聚类分析,探讨当归中主要无机元素的含量与其产地的关系。结果表明,当归药材中37种无机元素检出32种,各元素含量差异较大,重金属及有害元素Hg、Cu、Cd、As含量与其他植物相比处于较低水平。不同产区的当归表现出一定的聚类性特征,甘肃与青海当归中无机元素也存在差异,Sm、Nd、Cu、Cr、Cd、Rb和Sr等7种无机元素为其主要指标性成分,可对当归进行有效产地溯源。

The 37 inorganic elements in 26 batches of Angelica sinensis samples collected from Gansu, Qinghai, Sichuan and Yunnan were determined by inductively coupled plasma mass spectrometry, and the security situation of heavy metal elements and harmful elements was investigated. The differential characteristic elements in Angelica sinensis were determined by principal component analysis by using the determined values of 37 inorganic elements as variables, and then hierarchical cluster analysis was carried out with characteristic elements as variables to discuss the relationship between the contents of main inorganic elements in Angelica sinensis and their producing regions. As shown by the results, 32 kinds of 37 inorganic elements in Angelica sinensis were detected, and the contents of the elements were quite different. The contents of heavy metal elements and harmful elements including Hg, Cu, Cd and As were lower than those in other plants. Angelica sinensis in different producing regions showed certain clustering characteristics. There were differences in the inorganic elements of Angelica sinensis from Gansu and Qinghai, and 7 inorganic elements including Sm, Nd, Cu, Cr, Cd, Rb and Sr were the main index components, which could effectively trace the producing region of Angelica sinensis.