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采用波长色散X射线荧光光谱法(WDXRF)对小麦籽粒中Mn,Fe,Cu,Zn,Ca,Mg,P,K和S含量进行测定,讨论了不同产地小麦籽粒中矿质元素含量。运用主成分分析提取2个主成分、建立了主成分方程,利用聚类分析对小麦产地进行识别。结果表明,不同产地小麦籽粒中矿质元素含量差异明显。前2个主成分累积方差贡献率达到82.0%,黑龙江和内蒙古产地的小麦籽粒样品品质较优。在阈值为3.5的水平上将小麦籽粒样品聚为6类,可以实现小麦籽粒样品产地的初步鉴别。用WDXRF法结合化学计量学方法可揭示小麦籽粒样品中矿质元素含量差异及进行产地识别。
The contents of Mn, Fe, Cu, Zn, Ca, Mg, P, K and S in wheat grains were determined by wavelength dispersive X-ray fluorescence spectrometry (WDXRF). The contents of mineral elements in wheat grains from different origins were discussed. Principal component analysis was used to extract two principal components, the principal component equation was established and the origin of wheat was identified by cluster analysis. The results showed that there were significant differences in the contents of mineral elements in grains from different producing areas. The cumulative contribution of the first two principal components reached 82.0%, and wheat grain samples from Heilongjiang and Inner Mongolia originated better quality. The clustering of wheat grain samples into 6 categories at a threshold of 3.5 can lead to the initial identification of the origin of wheat grain samples. Using WDXRF method combined with chemometric method can reveal the difference of mineral elements content in wheat grain samples and identify the origin.