摘要
采用超声波提取法和常压提取法分别对绿茶(江西婺源)、红茶(河南信阳)、绞股蓝茶(神农架)中黄酮在不同条件梯度下进行提取。结果表明,3种茶叶黄酮提取的最佳条件为绿茶,常压下70%乙醇、60℃、40 min;红茶为常压下40%乙醇、80℃、40 min;绞股蓝茶为超声波70%乙醇、60℃、60 min。3种茶叶在最佳提取条件下进行黄酮含量的比较,绞股蓝茶中黄酮含量>红茶中黄酮含量>绿茶中黄酮含量。
The flavonoids of green tea(Wuyuan, Jiangxi), black tea (Xinyang, Henan), gynostemma tea(Shennongjia) were extracted by ultrasonic extraction and atmospheric extraction under different gradient conditions. The results showed that the optimal method of extraction of three kinds of tea were ordinary pressure 70% alcohol, 60 ℃, 40 rain for the green tea; or- dinary pressure 40% alcohol, 80 ℃,40min for the black tea and ultrasonic extraction 70% alcohol, 60 ℃, 60 rain for the gy- nostemma tea. Under these condition, the flavonoids in the three kinds of tea were in order of gynostemma tea〉 black tea〉 green tea.
出处
《湖北农业科学》
北大核心
2014年第17期4151-4154,共4页
Hubei Agricultural Sciences
基金
河北省自然科学基金项目(C2013109002)
河北省高等学校科学技术研究指导项目(Z2013055)
河北省教育厅科学研究计划项目(Z2010111)
邯郸学院硕博启动基金项目(2009009)
关键词
超声波提取
常压提取
绞股蓝茶
绿茶
红茶
ultrasonic extraction
atmospheric extraction
gynostemma tea
green tea
black tea