食品科学2016，Vol.37Issue(14)：68-73,6.DOI:10.7506/spkx1002-6630-201614012
ICP-MS法测定云南野生茯苓中矿质元素含量
Determination of Mineral Elements of Wild Wolifporia extensa Collected from Yunnan by ICP-MS
摘要
Abstract
This study was undertaken to investigate the distribution characteristics of mineral elements in wild Wolifporia extensa. Fifteen elements including Li, Mg, K, Ca, V, Cr, Mn, Fe, Cu, Zn, As, Rb, Sr, Cs, and Pb in the sclerotia of W. extensa collected from 28 regions of Yunnan province were determined by inductively coupled plasma-mass spectrometry (ICP-MS) after microwave digestion. The measurement data were analyzed by SPSS through principle component analysis (PCA), correlation analysis, and cluster analysis (CA). The results showed that the correlation coefficients (r) of the linear regression equations of the anayte elements were all above 0.999 0, the measured values of standard reference materials were in agreement with the certified values, and the relative standard deviations (RSDs) were all below 8%. Hence this method is suitable for the determination of mineral elements of wild W. extensa because of its good precision and accuracy. Our analysis results indicated that wild W. extensa collected from Yunnan contained many kinds of mineral elements. The concentration levels of Ca (925.79 µg/g), K (370.42 µg/g), Mg (115.20 µg/g), and Fe (115.80 µg/g) were the highest, and the levels of toxic elements As and Pb were below the maximum safe limits stipulated in the Standard for Maximum Levels of Contaminants in Foods (GB 2762—2012) and the FAO/WHO standards. The results of PCA indicated that 4 principal components were chosen to examine the dataset which could explain 77.55%of the total variance. V, Fe, Li, As, Cs, Cr, Pb, Sr, Ca, and Mn were inferred to be the characteristic elements in wild W. extensa. The results of correlation analysis and CA were in agreement with PCA. All the tested elements could be grouped into three clusters:Fe, V, Li, Cs, As, and Cr asthe first cluster;and Pb, K, Rb, Zn, Mg, and Cu as the second cluster;and Mn, Ca and Sr as the third cluster. The results of CA indicated that there were significant differences in the contents of mineral elements mainly because the mineral element contents of wild W. extensa were greatly influenced by the topography and climate characteristics of Yunnan province.关键词
电感耦合等离子体质谱法/茯苓/矿质元素/主成分分析/聚类分析Key words
inductively coupled plasma-mass spectrometry (ICP-MS)/Wolfiporia extensa/mineral elements/principle component analysis/cluster analysis分类
轻工纺织引用本文复制引用
孙景,张霁,赵艳丽,王元忠..ICP-MS法测定云南野生茯苓中矿质元素含量[J].食品科学,2016,37(14):68-73,6.基金项目
国家自然科学基金地区科学基金项目 （）
