Optimization of extractimg pigment from green tea by central composite design process
The objective was to extract green tea pigment from low baddish fannings of hangzhou green tea. Method: Effect of extraction tea pigment by micro-milling and enzyme was studied, and central composite design process was used in extraction process. Results: the optimal extraction rate was gained from the process that pectic enzyme was added in 80 mesh green tea, followed by cellulose enzyme. the optimum condition was as follows: 82% ethanol, minutes at 79 ℃ 12∶1 of ethanol to tea molar rate, the extaction rate of green tea pigment was 48.69%. Conclusion: Extration green tea pigment from low badninsh fannings of hangzhou green tea can increase additive values on tea.