茯砖茶抗氧化物质提取及其抗氧化活性研究

为了探讨茯砖茶抗氧化物质最优的提取条件及其抗氧化活性,通过单因素和正交试验,利用羟基自由基清除率和总还原力测定茯砖茶提取物的抗氧化活性。结果表明,茯砖茶抗氧化物质的最佳提取条件为：乙醇体积分数50%,提取温度75℃,提取时间2.5 h,料液比1∶25。茯砖茶抗氧化物质具有较强清除羟基自由基和还原能力,且都有较好的剂量依赖性;在相同浓度下,其抗氧化能力低于Vc。...

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Published in广东农业科学 Vol. 42; no. 21; pp. 106 - 110
Main Author 曾超珍 刘仲华
Format Journal Article
LanguageChinese
Published 湖南农业大学茶学教育部重点实验室,湖南长沙410128 2015
中南林业科技大学生命科学与技术学院,湖南长沙410004%湖南农业大学茶学教育部重点实验室,湖南长沙410128
国家植物功能成分利用工程技术研究中心,湖南长沙410128
Subjects
抗氧化物质
羟基自由基
茯砖茶
还原力
还原力
抗氧化物质
茯砖茶
羟基自由基
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ISSN1004-874X

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Summary:为了探讨茯砖茶抗氧化物质最优的提取条件及其抗氧化活性,通过单因素和正交试验,利用羟基自由基清除率和总还原力测定茯砖茶提取物的抗氧化活性。结果表明,茯砖茶抗氧化物质的最佳提取条件为：乙醇体积分数50%,提取温度75℃,提取时间2.5 h,料液比1∶25。茯砖茶抗氧化物质具有较强清除羟基自由基和还原能力,且都有较好的剂量依赖性;在相同浓度下,其抗氧化能力低于Vc。
Bibliography:Fu brick tea; antioxidants; hydroxyl radical; reducing power
44-1267/S
ZENG Chao-zhen, LIU Zhong-hua （ 1. Key Laboratory of Tea Science, Ministry of Education, Hunan Agricultural University, Changsha 410128, China ; 2. College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; 3. National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China ）
The optimum conditions for extracting antioxidants from Fu brick tea and its antioxidant activity were investigated by single factor and orthogonal experiments using the rate of scavenging hydroxyl radicals and reducing power as indexes. The results showed that the optimum extraction conditions of antioxidants from Fu brick tea were as follows ：50% ethanol,at 75℃ for 2.5 h,ratio of solid to liquid of 1∶25. Antioxidants from Fu brick tea had strong ability to scavenge hydroxyl radicals and reducing power,and had good measuring dependent. Its antioxidant
ISSN:1004-874X