食品科学 ›› 2007, Vol. 28 ›› Issue (9): 319-324.

• 工艺技术 • 上一篇    下一篇

超微粉碎对绿茶黄酮类物质提取率及风味物质含量的影响

 杨春瑜, 薛海晶, 夏文水   

  1. 江南大学食品学院; 东北林业大学林学院; 江南大学食品学院 江苏无锡214122哈尔滨商业大学食品工程学院; 黑龙江哈尔滨150076; 黑龙江哈尔滨150040; 江苏无锡214122;
  • 出版日期:2007-09-15 发布日期:2011-11-22

Effects of Ultrafine Grinding on Extraction Rate of Flavonoids and Flavor of Green Tea

 YANG  Chun-Yu, XUE  Hai-Jing, XIA  Wen-Shui   

  1. 1.School of Food Science and Technology,Jiangnan University,Wuxi 214122,China;2.College of Food Engineering,Harbin University of Commerce,Harbin 150076,China;3.School of Forestry,Northeast Forestry University,Harbin 150040,China
  • Online:2007-09-15 Published:2011-11-22

摘要: 本实验对比研究了经过干、湿法超微粉碎后绿茶粉和原料绿茶中黄酮类物质提取率和风味物质含量的变化。采用水提和醇提两种方法比较绿茶中黄酮类物质的提取率,摸索了效果较好的醇法提取粗黄酮的最优条件:固液比为1:15,浓度为90%的乙醇,提取温度45℃,提取时间为5h。在最优条件下对比绿茶中黄酮类物质提取率,结果表明干法(球磨法)超微粉碎效果最好,其次是湿法(胶体磨),制冷粗粉碎法效果最差。粗黄酮通过大孔树脂纯化后,黄酮纯度提高显著。茶叶中的风味物质在粉碎后没有发生明显的变化。

关键词: 绿茶, 黄酮类物质, 超微粉碎

Abstract: The changes of extracting rate of flavonoids and contents of flavors in green tea were compared after processing by dry and wet ultra-fine grinding and extracting by water and ethanol.The optimal extracting conditions of ethanol were confirmed after trial and error:ratio of solid to liquid 1:15,the concentration of ethanol 90%,the extraction temperature 45 ℃,the extraction time 5 h.The extracting rate of flavonoids under the best conditions showed that more flavonoids were extracted after being ultra-fine grond by dry method than wet method,and these two methods are better than normal grinding under cool condition.The finess of flavonoids of green tea are enhanced greatly after being purified through large hole AB-8 ressin.There is no privious changes about the components of flavors after ultra-fine ground.

Key words: green tea, flavonoids, ultra-fine grinding