摘要
提取了3种名优红茶水溶性成分,采用HPLC法分析提取物中8种儿茶素单体和3种茶黄素单体的含量,测定了红茶提取物体外清除2,2’-连氨-(3-乙基苯并噻唑啉-6-磺酸)二氨盐(ABTS)、二苯代苦味肼基(DPPH)自由基的能力,并分析了红茶提取物络合亚铁离子(FIC)的能力。结果表明:3种红茶水溶性提取物中,8种儿茶素总含量顺序为英红>祁红>滇红,3种茶黄素总含量顺序为英红>滇红>祁红;3种红茶都具有较强的清除ABTS自由基、DPPH自由基能力和络合亚铁离子能力,并与红茶提取物处理浓度呈剂量依赖性关系。
Eight kinds of catechins and three kinds of theaflavins were analyzed by HPLC after water-soluble components extracted from three kinds of black tea.Then,free radical scavenging abilities including 2,2-azinobis-（3-ethylbenzothiazoline-6-sulfonic acid）（ABTS）radical scavenging ability,1,1-diphenyl-2-picrylhydrazyl（DPPH）radical scavenging ability,and ferrous-ion chelating（FIC）ability of different concentration aqueous extracts were evaluated.The results showed that the order of catechins contents was Yinghong Qihong Dianhong,and the order of theaflavins contents was Yinghong Dianhong Qihong.Three black tea aqueous extracts showed significant ABTS and DPPH radical scavenging activity and ferrous-ion chelating ability.Moreover,percent DPPH and ABTS radical scavenging abilities and ferrous-ion chelating ability of black tea aqueous extracts were dose-dependent.
出处
《广东农业科学》
CAS
CSCD
北大核心
2010年第8期259-261,共3页
Guangdong Agricultural Sciences
基金
广东省农业科学院院长基金项目(201018)
广东省茶树资源创新利用重点实验室启动项目(2008A060301004)
关键词
红茶
抗氧化
儿茶素
茶黄素
自由基
black tea
antioxidant
catechins
theaflavin
free radical
