摘要
以日照绿茶为实验原料,利用水溶剂提取法,通过正交实验及单因素平行实验的方案,分析了料液质量比、浸提时间和浸提温度对茶多酚、茶多糖和茶氨酸联合萃取效果的影响;通过对萃取剂选择以及离子交换树脂的吸附性能研究,确定了茶多酚、茶多糖和茶氨酸联合分离提取的工艺。实验结果表明:该工艺可有效地从茶叶中提取茶多酚、茶多糖和茶氨酸,茶多酚的提取率为13.85%;茶多糖的提取率为1.76%;茶氨酸的提取率为0.19%。
Rizhao green tea is used as the experimental material in this study. Both orthogonal experiment and single-factor experiment arc used to study the effect of W/V rate, extraction time and temperature on the extraction result. Extraction technology of tea polyphenols, tea polysaccharide and theanine is confirmed by researches on selections of extractants and properties of ion-exchange resin. The optimal operation conditions are obtained by the static and dynamic state experiments. The experimental results indicate that the technology can extract tea polyphenols, tea polysaccharide and theanine from the green tea effectively, their extraction rates are 13.85% , 1.76% and 0. 19% , respectively.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第12期48-52,共5页
Modern Chemical Industry
关键词
茶多酚
茶多糖
茶氨酸
联合提取
tea polyphenols
tea polysacchadides
theanine
combinated-extraction
