[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.%[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 t. 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.
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