摘要
检测了金萱绿茶常规成分的含量,在茶水比1∶20、浸提时间1.5 h的条件下,研究了不同提取温度（50、60、70、80、90、100℃）对绿茶多糖体外抗氧化活性的影响。结果表明：绿茶多糖具有较好的清除DPPH自由基和ABTS自由基效果,对亚铁离子具有较强的络合能力;不同提取温度和不同浓度的绿茶多糖具有不同的抗氧化活性。综合多糖提取率和多糖活性两方面考虑,建议绿茶多糖水提温度设60~70℃为最佳。
Conventional components in Jinxuan green tea were detected.In order to study the effect of extraction temperature on antioxidant activity of Jinxuan green tea polysaccharide,ratio of tea to water（RTW）,time and temperatures were 1∶20,1.5 h and 50℃,60℃,70℃,80℃,90℃,100℃ respectively.The results showed that green tea polysaccharide had significant free radical scavenging abilities including 1,1-diphenyl-2-picrylhydrazyl（DPPH） radical scavenging ability,2,2-azinobis-（3-ethylbenzothiazoline-6-sulfonic acid）（ABTS） radical scavenging ability and ferrous-ion chelating（FIC） ability.Different extraction temperatures and different concentrations of green tea polysaccharide showed different antioxidant activities.Taking into account the extraction rate and antioxidant activity of polysaccharide,it was recommended that the optimum temperature of green tea polysaccharide was 60~70℃.
出处
《广东农业科学》
CAS
CSCD
北大核心
2011年第1期123-125,共3页
Guangdong Agricultural Sciences
基金
广东省茶树资源创新利用重点实验室资助项目(2008A060301004)
关键词
绿茶
多糖
提取
抗氧化
自由基
Green tea
polysaccharide
extract
antioxidant
free radical
