应用转盘塔逆流萃取器从夏秋季次品茶中制备茶多酚  

Preparation of Tea Polyphenols from Summer-Autumn Low-Grade Tea by Countercurrent Extraction Using Rotary Disc Extractor

作　　者：卫哲[1] 肖维[1] 黎忠健[1] 王俊[1] 吴福安[1,2] 

机构地区：[1]江苏科技大学生物与化学工程学院,江苏镇江212018 [2]中国农业科学院蚕业研究所,江苏镇江212018

出　　处：《食品科学》2013年第14期35-39,共5页Food Science

基　　金：国家自然科学基金青年科学基金项目(21206061);中国博士后基金面上项目(2012M510124);江苏省2010年高校"青蓝工程"优秀青年骨干教师资助计划项目;江苏省科技支撑计划(农业)项目(BE2010419);江苏省自然科学基金面上项目(BK2009213);国家现代农业产业技术体系建设专项(CARS-22);江苏科技大学科研项目(35211002;33211002);江苏省2011年高等学校大学生实践创新训练计划项目(808)

摘　　要：探究基于转盘塔的连续逆流萃取器从夏秋季次品茶中制备茶多酚的工艺可行性。以夏秋季次品茶为原料,预处理制备茶多酚粗提水溶液,考察萃取溶剂、料液pH值、萃取温度、反萃取温度及转盘转速等因素对茶多酚萃取效果的影响。结果表明应用自制转盘塔的连续逆流器制备茶多酚的最佳工艺条件为:三乙酰甘油酯为萃取剂,等体积萃取pH3.17的次品茶料液,萃取器夹套温度10～20℃,反萃取器夹套温度70～80℃,转盘轴转速200r/min,萃取5h制备茶多酚的得率高达18.9%。该工艺流程短,投资少,成本低,能耗低,环保高效。The applicability of the countercurrent rotary disc extractor was examined in this study for liquid-liquid extraction of tea polyphenols（TPs） from summer-autumn low-grade tea.Crude aqueous extracts were prepared and operating parameters including extraction solvent,initial solvent pH,extraction temperature,back extraction temperature and rotation speed were explored.The results indicated that the best conditions for liquid-liquid extraction of TPs were addition of the same volume of the extraction solvent glyceryl triacetate to crude aqueous extract at pH 3.17,extraction at 10 to 20 ℃ and back extraction at 70 to 80 ℃ with a rotation speed of 200 r/min.The recovery rate of TPs was 18.9% after 5 h extraction under the optimized conditions.The advantages of the developed countercurrent extraction process using rotary disc extractor are characteristics of short process flow,low investment,low cost,low energy consumption,environmental friendliness and high efficiency.

关 键 词：茶多酚 次品茶 转盘塔 逆流萃取 

分 类 号：TS272.4[农业科学—茶叶生产加工]