挤压超声联用提取葡萄籽原花青素工艺优化

摘要

以经脱脂后的葡萄籽为原料，挤压-超声波联用法提取其中原花青素。采用单因素和正交试验确定最优工艺条件。研究结果表明，挤压处理最优条件：物料含水率10%、挤压温度100℃、螺杆转速120 r/min。超声提取的最优条件为：超声时间15 min、超声波功率80W、料液比1∶20（g/mL）、乙醇浓度50%、处理温度45℃。按挤压-超声波联用最优工艺条件提取，原花青素的得率高达（4.41±0.07）%。%Extrusion in conjunction with ultrasonic treatment was used to extract proanthocyanidins from defat-ted grape seeds.The optimal extraction conditions by single factor test and orthogonal test were obtained.The re-sults showed that the optimal extraction conditions of extrusion treatment were as following:material moisture content 10%,extrusion temperature 100℃and screw speed 120 r/min. The optimal extraction conditions of ul-trasonic treatment were as following:the ultrasonic time 15 min,the ultrasonic power 80 W,the ratio of material to liquid 1∶20 (g/mL),ethanol concentration 50%,the temperature 45℃. Under this condition,proanthocyani-dins yield could reach up to(4.41±0.07)%.