【摘要】 以水为提取溶剂,在单因素试验的基础上,利用响应面分析法优化了五倍子中单宁酸的超声波辅助提取条件。利用中心组合(Box-Behnken)实验设计原理研究液固比、超声波作用时间、超声波功率3个自变量对响应值单宁酸提取得率的影响。结果表明,单宁酸最佳超声波辅助提取条件为:5 g五倍子粉末,液固比38∶1(mL∶g),超声波提取时间32 min,超声波功率250 W,在此条件下单宁酸提取得率为66.0%。更多还原

【Abstract】 The ultrasonic-assisted extraction of tannic acid from Chinese gallnut with water as extraction agent were determined on the basis of single factor experiment using response surface method(RSM).According to central composite(Box-Behnken) design principle,the effect of three independent variables on the yield of tannic acid,namely liquid to solid ratio,ultrasonic extraction time,and ultrasonic power was investigated.The results showed the optimum ultrasonic-assisted extraction conditions were: 5 g of Chinese gallnut powder,liquid to solid ratio 38 ∶ 1(mL ∶ g),ultrasonic extraction time 32 min,ultrasonic power 250 W.Under the optimum conditions,the extraction yield of tannic acid was 66.0 %.更多还原