响应面法优化超声辅助提取花生红衣多酚工艺

摘要

The ultrasonic-assisted extraction of polyphenols from peanut skins was optimized using response surface methodology. The extraction yield of polyphenols was investigated with respect to four process parameters including ultrasonic treatment time, ultrasonic power, ethanol concentration and solid-to-solvent ratio. As a result, a quadratic polynomial mathematical model was built. In theory, the optimal extraction conditions were determined as follows:peanut skins were suspended in 51%ethanol aqueous solution at a solid-to-solvent ratio of 1:29.6 (g/mL) and then subjected to ultrasonic treatment for 24.4 min at a power of 408 W. For practical applications, the same extraction solvent was used, but the solid-to-solvent ratio, ultrasonic treatment time and power were modified to be 1:30 (g/mL), 24 min and 410 W, respectively. Under the modified conditions, the extraction yield of polyphenols was 8.95%.%以花生红衣为原料，采用超声波辅助提取其中的多酚类物质。通过单因素试验对超声时间、超声功率、料液比、乙醇体积分数等工艺参数进行研究，并用响应面法优化提取工艺，建立二次多项数学模型。结果表明，花生红衣多酚提取的最佳工艺参数为超声时间24.4min、超声功率408W、料液比1：29.6(g/mL)、乙醇体积分数51%。结合实际操作，响应面优化的最优工艺参数调整为超声时间24min、超声功率410W、料液比1：30(g/mL)、乙醇体积分数51%，此条件下花生红衣多酚得率为8.95%。