PENG Lianxin, UANG Yanfei, LIU Yuan, ZHANG Zhifeng, LU Luyang , ZHAO Gang
Journal ofIntegrative Agriculture.2014,3(08):87-94.
Abstract:The essential and toxic element concentrations in buck wheat were analyzed by inductively coupled plasma optical emission spectrometer (ICP-OES). The concentration data were subjected to common chemometrics analyses, including correlation analysis (CA), principal component analysis (PCA) and hierarchical cluster analysis (HCA), to gain better understanding of the differences among the tested samples. Our results indicated that the essential and toxic element concentrations were not different between Fagopyrum tataricum (L.) Gaertn and F. esculentum Moench. The element concentrations varied among buck wheat samples from different sources.Commercial tartary buck wheat tea contained several essential elements, thus,could be used as the source of essential elements. The detection of toxic heavy metals in commercial tartary buck wheat tea suggested that safety issue of such buck wheat products should be seriously concerned. Our results also revealed that the place of origin and the processing protocol of tartary buck wheat affected the element concentrations of the commercial form. The implications to the quality control and safety evaluation of buck wheat were extensively discussed.
Keywords：buckwheat; ICP-OES;trace element; toxic element; chemometrics