茶是世界三大饮料之一,目前茶叶中已发现的化学成分有450多种,其中茶多酚(Grean tea Polyenohs,GTP)占茶叶干重的22%～30%,是茶叶的有效成分之一,主要由儿茶素、黄酮类、酚酸类、花色素等4大类物质组成。儿茶素是一种天然化合物,占茶多酚总量的60%～80%,1929年首次从茶叶中提取分离,其主要含50%～60%表 Tea is one of the three major beverages in the world. At present, there are over 450 kinds of chemical constituents found in tea. Among them, Grean tea polyenohs (GTP) accounts for 22-30% of the dry weight of tea and is the active ingredient of tea First, mainly by catechins, flavonoids, phenolic acids, anthocyanins and other four major categories of material composition. Catechin is a natural compound, accounting for 60% to 80% of the total amount of tea polyphenols, extracted from tea for the first time in 1929, the main containing 50% to 60% of the table