摘要
采用紫阳富硒茶的老叶为原料,连续提取茶多酚和茶多糖,并测定其硒含量。以液固比、乙醇浓度、提取温度,提取时间为单因素试验的基础上,通过正交试验优化提取工艺。结果表明:最佳提取条件是液固比35∶1(mL/g)、乙醇浓度40%、提取温度65℃、提取时间60min。其中,茶多酚的提取率为32.56%,纯度为43.29%,其硒含量为0.35μg/g;茶多糖的提取率为26.33%,纯度为37.67%,其硒含量为1.75μg/g。
This paper used old leaves of ziyang tea as raw materials, continuous extraction of tea polyphenous and tea polysaccharide, and determination of selenium content of both. Considering liquid-solid ratio, ethanol concentration, extraction temperature, extraction time as the single factor, the process parameters of extraction were optimized by orthogonal experime. Best of continuous extraction conditions ： liquid-solid ratio was 35 ： 1 （mL/g）, ethanol concentration was 40 %, extraction temperature was 65 ℃, extraction time was 60 min. The results showed that the extraction rate of tea polyphenols was 32.56 %, the purity was 43.29 %, the selenium content was 0.35 μg/g; the extraction rate of tea polysaccharide was 26.33 %, the purity was 37.67 % ,the selenium content was 1.75 μg/g.
出处
《食品研究与开发》
CAS
北大核心
2016年第21期28-31,共4页
Food Research and Development
基金
陕西省科技统筹创新工程项目(2013KTZB02-01-04)
西安市技术转移促进工程项目(CXY1434-3)
陕西省教育厅产业化培育项目(14JF002)
关键词
连续提取
茶多酚
茶多糖
continuous extraction
tea polyphenols
tea polysaccharide
