| 温度对绿茶汤色变化的影响 |
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| 引用本文： | 李钊,夏涛,高丽萍,戴前颖,朱博,吴平,李云飞.温度对绿茶汤色变化的影响[J].安徽农业大学学报,2010,37(3). |
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| 作者姓名： | 李钊 夏涛 高丽萍 戴前颖 朱博 吴平 李云飞 |
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| 作者单位： | 安徽农业大学教育部和农业部茶叶生物化学与生物技术重点实验室,合肥,230036;安徽农业大学生命科学学院,合肥,230036 |
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| 基金项目： | 教育部科研重点项目，安徽省人才基金，安徽农业大学引进与稳定人才科研启动项目 |
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| 摘 要： | 采用系统溶剂分离法,依次用有机溶剂石油醚、无水乙醚、乙酸乙酯和正丁醇萃取不同温度处理后的茶汤,探讨温度变化导致绿茶汤色劣变的成因.HPLC分析和色差计测定结果表明,与绿茶汤色变化关系密切的物质主要分布在正丁醇相和水相中;儿茶素脱没食子化和降解反应主要发生在低温条件下(10℃、40℃和70℃);高温条件下(100℃)主要发生儿茶素脱没食子化和异构化反应;低温(10℃)条件下会发生黄酮苷的水解.
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| 关 键 词： | 绿茶汤色 温度 系统溶剂分离法 儿茶素 黄酮 |
Effect of temperature on the color of green tea infusion |
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| LI Zhao,XIAO Tao,GAO Li-ping,DAI Qian-ying,ZHU Bo,WU Ping,LI Yun-fei.Effect of temperature on the color of green tea infusion[J].Journal of Anhui Agricultural University,2010,37(3). |
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| Authors: | LI Zhao XIAO Tao GAO Li-ping DAI Qian-ying ZHU Bo WU Ping LI Yun-fei |
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| Institution: | LI Zhao1,XIAO Tao1,GAO Li-ping2,DAI Qian-ying1,ZHU Bo1,WU Ping1,LI Yun-fei1(1.Key Laboratory of Tea Biochemistry & Biotechnology,Ministry of Education and Agriculture,Anhui Agricultural University,Hefei 230036,2.School of Life Science,Hefei 230036) |
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| Abstract: | In order to study the reason that temperature caused the color change of green tea infusion,petroleum ether,anhydrous ether,ethyl acetate and n-butanol were used one by one to extract green tea infusion treated under different temperatures by means of the systematical solvent separation.The results of colorimeter and HPLC(high performance liquid chromatography) analysis showed that the substance related to the color change of green tea infusion mainly distributed in n-butyl alcohol phase and aqueous phase.T... |
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| Keywords: | color of green tea infusion temperature systematical solvent separation catechins flavones |
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