超声波辅助提取藜麦多酚及其活性的研究

摘要

通过单因素试验优化超声波辅助提取藜麦多酚的工艺研究，并对藜麦多酚提取液的活性、对自由基和亚硝酸根的清除作用进行研究。结果表明：藜麦多酚的最佳提取工艺为70%乙醇做溶剂、料液比1∶25（g/mL）、超声温度为50℃、以320 W功率超声波辅助提取20 min，藜麦多酚的得率为0.215%，藜麦多酚提取液对亚硝酸根离子的清除能力达到88.4%，对羟自由基的清除能力达到90.4%，对DPPH·的清除率为84.3%。%The ultrasonic-assisted extraction process for polyphenols from the quinoa was performed using sin-gle factor experiments,The antioxidant capability , scavenging capability for NO2-and free radicals were inves-tigated with the extracts of quinoa .The results showed that the optimum extraction condition were:extraction solvent of 70%ethanol,the radio of materials to liquid 1∶25 (g/mL),temperature of 50℃, time of 20 min, power of 320 W. The yield of quinoa polyphenols was 0.215 %;and the scavenging rate to NO2-,OH· and DPPH·were 88.4%, 90.4%and 84.3%, respectively ,with polyphenols extraction of quinoa.