ICP-MS分析鱼腥草不同部位中无机元素差异

Analysis of inorganic elements in different parts of Houttuynia cordata by ICP-MS

目的:分析鱼腥草地上部分和根茎中无机元素差异。方法:采用微波消解处理鱼腥草样品,电感耦合等离子体质谱(ICP-MS)测定鱼腥草不同部位中Mg,K,Ca等27种无机元素含量,利用SIMCA-P 13.0软件对数据进行主成分分析和偏最小二乘判别分析。结果:27种元素线性关系良好,相关系数r≥0.9986;精密度和重复性实验的RSD≤6.0%;回收率在95.12%~109.48%,RSD≤6.0%。鱼腥草样品中Mg,K,Ca和Fe含量较高,主成分分析(PCA)可将地上部分和根茎明显区分为两组。结论:本方法简便、灵敏、快捷,可用于鱼腥草样品的测定,不同部位中无机元素存在一定差异。

Objective:To analyze the differences of inorganic elements in Houttuynia cordata aerial part and rhizome.Methods:The contents of 27 inorganic elements of Houttuynia cordata samples,such as Mg,K,and Ca,were analyzed by microwave digestion coupled with Inductively Coupled Plasma Mass Spectrometry(ICP-MS)method.The data of principal components and partial least squares discriminant analysis were analyzed with the SIMCA-P 13.0 software.Results:The 27 elements showed good linearities in the selected concentration ranges(r≥0.9986).The relative standard deviations(RSDs)of the precision and repeatability were less than 6.0%.The average recovery ranged from 95.12%to 109.48%,with RSD≤6.0%.Mg,K,Ca and Fe were the major inorganic elements of H.cordata.Principal component analysis(PCA)analysis significantly separated H.cordata aerial part and rhizome into two groups.Conclusion:The method with high sensitivity and good accuracy was simple and fast.There were some differences among the contents of inorganic elements in Houttuynia cordata aerial part and rhizome.