Abstract
This paper was to study the biochemical components and groups differences among 28 tea samples from different tea regions in yunnan. The biochemical components of 28 tea samples were analyzed by conventional method and high performance liquid chromatography. Principal component analysis and cluster analysis were used to classify 28 tea samples.The results showed that the mainly biochemical components of 28 tea samples,which included catechinepicatechin and epigallocatechin had large variation coefficients,56.88%,36.41% and 49.52%,respectively. The diversity index was 1.91,1.91 and 1.97,respectively. All above explained the characteristics of the samples in biochemical components were more abundant in the composition and performance of non-galloylatedcatechins. The samples were divided into 6 groups by cluster analysis,there were some differences in the content of biochemical components between the groups.
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