【摘要】 用离子沉淀、微波+离子沉淀、有机溶剂直接萃取三种方法提取武夷岩茶中茶多酚,提取率分别是4.41±0.43%、6.53±1.37%、5.83±0.08%。沉淀法提取的粗品纯度为21.12%(水溶解)和14.54%(乙酸乙酯溶解);有机溶剂直接萃取的粗品纯度为69.88%(水溶解)和83.88%(乙酸乙酯溶解)。茶多酚粗品红外光谱分析的结果为单宁酸;紫外光谱分析的结果吸收峰在270~273.5nm之间。更多还原

【Abstract】 The paper shows that three methods can be used in extrction of tea-polyphenols in Wuyi rock tea by ion precipitation seperation,microwave + ion precipitation seperation and direct extrction with organic solvent.The extrction rate is respectively 4.41±0.43%,6.53±1.37%,5.83±0.08%. The purity of rough product by precipitation seperation is 21.12%(in distilled water) and 14.54%(in ethyl acetate),and the purity of rough product by direct extrction with organic solvent is 69.88%(in distilled water) and 83.88%(in ethyl acetate).The infrared spectrum analysis on rough tea-polyphenols is tannic acid,and the maximum of absorb is between 270～273.5nm by ultraviolet spectrum analysis on it.更多还原