The model of quality evaluation and products discrimination of Oolong tea based on chemical composition, factor and discriminant analysis were studied with Guangdong, southern and northern Fujian Oolong tea as the samples. Seven factors with cumulative variance of 85.041% were obtained along with factor analysis, set the factors as the independent variable, and discriminating classification of the samples area,variety and grade use discriminant analysis. Then the discrimination functions were established. Results of cross-validation and resubstitution of testing samples demonstrated the correct rates of discrimination model of area and variety was satisfactory. Recognition accuracy of the resubstitution and cross-validation of area were 97.6% and 94.0%, which of variety was 86.9% and 75.0%. Seven score function of quality factor and one comprehensive evaluation function were established for Oolong tea, and three discrimination functions for producing area and six of variety were obtained and the discrimination results were satisfactory.
SUN Wei-jiang
,
DONG Qing-hua
,
ZHOU Wei-long
,
DONG Xiu-yun
. Study on the Quality Evaluation and Product Discriminate of Oolong Tea[J]. Journal of Tea Science, 2011
, 31(4)
: 305
-312
.
DOI: 10.13305/j.cnki.jts.2011.04.004
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