基于ICP-MS的不同品种柑橘中矿物元素的差异性分析

Determination of Trace Elements in Species of Citrus from Different Growing Areas by Microwave Digestion-ICP-MS and Their Difference Analysis

研究春见蜜柑、不知火、茂谷柑三种不同种属不同产地柑橘中Na、K、Mg、Mn、Ca、Fe、Zn、Cu八种矿质元素的含量,从四个省份9个产地收集三个品种27个样品。采用微波消解-电感耦合等离子体质谱法检测样品中的8种矿质元素。同时采用主成分分析法和聚类分析法对不同品种不同产地间矿质元素含量的差异进行分析,检测结果表明三个柑橘品种样品中常量元素钾的含量最高,均在1000 mg/kg以上,占8种元素总含量的60%以上,其次为钙、镁,钠,钠为常量元素中含量最低的元素;主成分分析结果表明,前两个主成分方差贡献率为72.4%,K、Mg、Zn、Cu、Mn、Fe是不同品种及产地来源柑橘的特征差异元素;聚类分析结果表明同品种内不同产地样品矿物元素含量有差异,品种造成的元素含量差异明显大于由产地环境引起的差异。

The contents of eight mineral elements(Na,K,Mg,Mn,Ca,Fe,Zn and Cu)in citrus of different species(“chun jian”,“buzhihuo”,“maoguogan”)were studied.27 samples of three varieties were collected from 9 producing areas in four provinces.Eight mineral elements in the samples were detected by inductively coupled plasma mass spectrometry after microwave digestion.At the same time,the principal component analysis(PCA)and cluster analysis method were adopted to analyze mineral elements content of differences between different varieties.The results showed that the contents of the constant element potassium in the samples of the three citrus varieties were the highest,all above 1000 mg/kg,accounting for more than 60%of the total contents of the eight elements.The results of principal component analysis showed that the variance contribution rate of the first two principal components was 72.4%.K,Mg,Zn,Cu,Mn and Fe were the characteristic elements of different varieties and citrus of origin.The results of cluster analysis showed that there were differences in mineral element content of samples from different producing areas in the same variety.The difference of element content caused by varieties was obviously greater than that caused by the environment of producing area.