铜仁市四种绿茶茶多酚提取率的比较分析

为对铜仁市茶叶品质成分提供科学依据,用酒石酸亚铁比色法对铜仁市的印江梵净山绿茶、松桃生态绿茶、石阡苔茶、沿河云雾绿茶四县同一季节同一等级茶叶中茶多酚提取率进行比较研究,同时对松桃生态绿茶同一产地不同采收时节茶叶中茶多酚的提取率进行比较研究。结果表明:茶多酚的提取率含量较高的是石阡苔茶,其次是松桃生态绿茶、沿河云雾绿茶、印江梵净山绿茶;松桃县云雾绿茶不同采收时节的茶叶中茶多酚提取率含量较高的是清明茶,其次是清明前茶、谷雨茶、清明后茶。

Comparative Analysis on Tea Polyphenols Extraction Rates of Four Kinds of Green Teas in Tongren

To provide a scientific basis for tea quality and components in Tongren city, the experiment applied ferrous tartrate colorimetric method to compare the tea polyphenols extraction rates of four different green teas in Tongren city： Fanjing Mountain green tea from Yinjiang, ecological green tea from Songtao, Tai green tea from Shiqian, and the cloud green tea from Yanhe, which were picked in the same season and also in the same grade. The tea polyphenols extraction rates of Songtao ecological green teas from the same origin but in different picking seasons were also compared. The results showed that Tai green tea from Shiqian extracted the most, ecological green tea from Songtao, the cloud green tea from Yanhe, Fanjing Mountain green tea from Yinjiang progressively declinded. Meanwhile, among the Songtao ecological green teas in different picking seasons, the tea in Qingming season extracted the most, the tea before Qingming follows, then the tea in Guyu, the tea after Qingming the lest.