单 位：
青岛农业大学食品科学与工程学院;日照职业技术学院
关键词：
日照红茶;超声波辅助提取;提取率;响应面
摘 要：
[目的]确定红茶酚类物质超声波辅助提取的最佳工艺条件。[方法]以日照红茶为材料,采用Box-Behnken响应面设计法对茶多酚超声波辅助提取工艺进行优化,建立了乙醇体积分数、超声时间、超声温度、乙酸乙酯萃取静置时间4个因素与茶多酚提取率之间的回归优化模型。[结果]4个因素对红茶酚类提取率的影响大小依次为超声时间>乙醇体积分数>静置萃取时间>超声温度,从模型得出的日照红茶酚类物质最佳提取工艺为超声时间80 min,乙醇体积分数88.99%,静置萃取时间89.97 min,超声温度80℃,在此最佳工艺参数下,红茶酚类提取率最高可达73.50%。[结论]该研究可为茶叶深加工和红茶的深度开发提供理论依据。
译 名：
Optimization of Response Surface of Ultrasonic-assisted Extraction of Rizhao Black Tea
作 者：
TANG Yu-huan et al(Food Science and Engineer Institute,Qingdao Agricultural University,Qingdao,Shandong 266109)
关键词：
Rizhao black tea;Ultrasonic-assisted extraction;Extraction yield;Response surface
摘 要：
[Objective] The aim was to determine the optimal technology for ultrasonic-assisted extraction of black tea was determined.[Method] Taking Black Tea as materials,the Box-Behnken response surface design method of tea polyphenols ultrasonic-assisted extraction process optimization was applied.The regression optimization model of the ethanol volume fraction,ultrasonic time,ultrasonic temperature,ethyl acetate extract stalling time and tea polyphenols was established.[Result] The influence of four factors on the black tea polyphenol solvents affecting size was as follows: ultrasonic time > ethanol volume fraction > stalling extraction time > ultrasound temperature.The best extraction process was ultrasonic time 80 min,volume fraction of 88.99% ethanol,quiet place extraction time 89.97 min,ultrasonic temperature of 80 ℃.At the optimized technical parameters,the black tea phenolic extraction yield can be as high as 73.50%.[Conclusion] The study provided theoretical basis for the development of tea leaves and black tea.
