茶色素制备方法的研究

以绿茶提取的茶多酚为原料,通过采用化学氧化法和酶促氧化法进行分析,探讨这2种方法对茶多酚氧化产物——茶色素的得率及其主要组成成分的影响,结果表明:在化学氧化体系中增加K3Fe(CN)6的用量有利于茶黄素的积累,但茶色素的得率却呈下降趋势,酶促氧化法所得的茶色素中茶黄素含量高达52.73%,远高于化学氧化法。

Research on Preparation Method of Tea Pigment

The tea polyphenol separated from green tea was used as the raw material of preparing tea pigment,and the effects of two kinds of preparation and analysis methods(chemical oxidation method and enzymatic oxidation method) on the gain rate and main components of tea pigment(the oxidative product of tea polyphenol) were explored.The results showed that: in chemical oxidation system,increasing the dosage of K3Fe(CN)6 was good for the accumulation of theaflavins content,but the gain rate of tea pigment declined.The theaflavins content was as high as 52.73% in tea pigment obtained by enzymatic oxidation method,which was significantly higher than that did by chemical oxidation method.