Application of fisher's discriminant analysis to discriminate different varieties of black tea and dianhong tea cream produced by different methods

The feasibility of using Fisher's discriminant analysis to distinguish different varieties of black tea and tea cream produced by different methods was investigated. Protein, total sugar, thearubigins, theaflavin, theabrownin and 9 mineral elements were used as the variables for discriminant analysis of different varieties of black tea and tea cream made from broken Diangong tea. The results showed that Fisher's discriminant analysis is reliable in discriminating all tested samples. Fisher discriminant analysis is helpful to reduce interference from subjective factors in the process of sensory evaluation, avoiding ambiguity and uncertainty and ensuring the stability and reliability. © 2016, China Food Publishing Company. All right reserved.