RSD法优化紫葡萄皮花色苷超声辅助萃取工艺研究

Optimization research of anthocyanins ultrasonic extraction by response surface design from purple grapes peels

紫葡萄皮糖苷是一种水溶性色素,以紫葡萄皮为材料。采用超声工艺提取,以超声功率、超声温度、超声频率、超声时间为主要因素,通过测定花色苷的吸光值,采用pH示差法以确定其含量,应用响应面设计进行优化。试验结果表明,紫葡萄皮糖苷超声提取最优提取条件为:超声功率286 W,超声温度为45.2℃,超声频率为48.8kHz,超声时间为45min。此时花色苷得率为0.235g/100g。

Anthocyanin in the purple grapes peels is a water-soluble pigments, the optimization research of anthocyanins ultrasonic extraction by response surface design from purple grapes peels was studied in this paper. Through Box-beheken design, the effects of Ultrasonic power, ultrasonic temperature, ultrasonic frequency, ultrasonic time were selected as the main factors. The results showed that the optimal extraction conditions as followed- ultrasonic power is 286 W, ultrasonic temperature is 45. 2 ℃, ultrasonic frequency is 49.8 kHz, and ultrasonic time is 45 rain. At this point the maximum anthocyanin yield is 0. 235 g/100g.