基于电感耦合等离子体质谱法对不同产地小米矿物元素的差异性分析

Analysis of the difference of mineral elements of millet from different regions based on inductively coupled plasma mass spectrometry

中文关键词:  小米  电感耦合等离子体质谱法  矿物元素  主成分分析  聚类分析

英文关键词:millet  inductively coupled plasma mass spectrometry  trace elements  principal component analysis  clustering analysis

中文摘要:

      目的 探究不同产地品种来源小米矿质元素含量差异并分析其原因。方法 采用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)对小米(陕西、山西、内蒙古、河北、山东、东北产区)6大主产区不同品种样品的K、Ca、Na、Mg、Al、Fe、Cu、Zn、Mn、Se、B、Ti、Co、Sr、Mo 15种矿物元素进行检测, 同时采用主成分分析法(principal component analysis, PCA)和聚类分析法对不同产地小米矿质元素含量的差异进行分析。结果 不同产地品种小米元素含量差异显著(P<0.05), Se、Sr、Al 3种元素含量差异最为明显, 变异系数最高, Zn、Cu、K 3种元素的变异系数最小。主成分分析结果表明, 前2个主成分方差贡献率为63.9%, K、Ca、Mg、Fe、Cu、Zn、Mn、B、Mo、Al、Se、Sr、Ti是不同品种及产地来源小米的特征差异元素。结论 品种对小米元素分布造成的影响有限, 地域环境因素是造成小米元素分布差异的主要因素。

英文摘要:

      Objective To explore the differences of mineral elements content in millet from different producing areas and analyze the reasons for the differences. Methods The 15 kinds of mineral elements (K、Ca、Na、Mg、Al、Fe、Cu、Zn、Mn、Se、B、Ti、Co、Sr、Mo) content of millet samples from 6 major producing areas (Shaanxi, Shanxi, Inner Mongolia, Hebei, Shandong and northeast China) was detected by inductively coupled plasma mass spectrometry (ICP-MS). At the same time, the principal component analysis (PCA) and cluster analysis method were used to analyze the differences of mineral element content in millets from different regions. Results The element content in millets from different regions was significantly different (P<0.05). The content of Se, Sr and Al was the most obvious, and the variation coefficient was the highest, while Zn, Cu and K had the least variation coefficient. The results of principal component analysis showed that the variance contribution rate of the first two principal components was 63.9%, and K, Ca, Mg, Fe, Cu, Zn, Mn, B, Mo, Al, Se, Sr and Ti were the characteristic difference elements in millets from different regions. Conclusion Cultivars has limited influence on millet element contents, and regional environmental factors are the main factors that caused the difference in the distribution of millet element contents.