Principal Component Analysis and Clustering Analysis of Trace Elements in Different Asteroidea

Abstract:

The paper set up a new method to determine the concentrations of trace elements in Starfish samples in 7 different places The samples digested by microwave digestion，and trace elements amounts of Cr，Co，Ni，Cu，Zn，As，Se，Cd and Pb in samples solutions were determined by inductively coupled plasma mass spectrometry（ICP-MS）. The principal components analysis and cluster analysis of SPSS11.5 were applied to the study of experiment data. The result showed that the average concentrations of Cd and Cr in Starfish samples were more than those national limited values（GB2762-2012），Besides，the principal component analysis showed that three principal components accounted for more than 60%，and Zn，Se，Ni and As were characteristic elements in Starfish samples. In addition，It also preliminarily analyzed human intake of characteristic elements，According to those characteristic elements，the result of clustering analysis showed that the samples could be reasonably clustered into two groups，including swallow and starfish，when the Euclidean distance was 25.0. These samples could also be divided into five categories and eight categories by such analysis methods. The analyzed result showed that the clustering analysis was partly based on the difference in varieties. Therefore，it was more important to consider genetic reasons while choosing Starfish，The research provided the development and utilization of Starfish with important information.