摘要
研究了树脂吸附法分离纯化茶多酚的绿色工艺。浸提低品位茶叶得到的浸提液,乘热粗沙沙滤,调pH值至1.5,使色素、咖啡因和大分子物质得到预分离,然后细沙沙滤、上AB-8树脂进行吸附,依次用蒸馏水和pH值为2～4的5%的乙醇溶液洗脱处理,洗脱剂为质量分数60%的乙醇,洗脱液喷雾干燥得到茶多酚产品,纯度可达90.22%。
A green technology for isolating and purifying tea polyphenols(TP) from tea leaves by macroporous resins was studied as follows:soak low-grade tea leaves and filter the crude extract by coarse sand immediately,remove pigment,macromolecular substances and caffeine from crude extract by adjusting pH value,filter again by fine sand and load it onto a column containing macropore resin AB-8 for absorbing TP;TP was desorbed with 5% EtOH eluant of pH value 1.5 and 60% EtOH subsequently;dry the solution by spray dryer to obtain high purity TP of purity 90.22%.
出处
《林产化学与工业》
EI
CAS
CSCD
2004年第4期65-67,共3页
Chemistry and Industry of Forest Products
基金
湖南省科委重点攻关资助项目(00NK1010)
关键词
茶多酚
沙滤
吸附树脂
tea polyphenols
sand filter
adsorption resin
