超高压提取洋葱皮中阿魏酸的研究

摘要

Objective:To research the optimum technology conditions of extracting ferulic acid from Allium cepa L.peel by ultra high pressure method and compare with reflux extraction method and ultrasonic wave extraction method.Method:According to the signal factor test,the L9 (34) orthogonal design is used to optimize extraction conditions.Take extraction yield of ferulic acid as index,the influence of solid to liquid ratio,ethanol concentration,UHP pressure,UHP time are studied.Result:Optimum extraction conditions are as follows:solid to liquid ratio is 1 ∶ 22 (g ∶ mL),ethanol is 75％,UHP pressure is 320 MPa and UHP time is 4 min,the yield of ferulic acid is 0.322％.Conclusion:The UHP extraction method is a suitable method with high yield and short extraction time.%目的:研究采用超高压提取洋葱皮中阿魏酸的最佳工艺条件,并且同回流提取法和超声提取法进行比较.方法:在单因素实验的基础上,采用L9(34)正交实验对超高压提取洋葱皮中阿魏酸的工艺进行优化,以阿魏酸的得率为指标,考察料液比(g∶mL)、乙醇浓度、超高压压力、加压时间对阿魏酸得率的影响.结果:得到优化的工艺条件为固液比1*22,乙醇浓度75％,超高压压力320 MPa,超高压时间4 min,该条件下阿魏酸的得率可达0.322％.结论:超高压提取阿魏酸得率高,提取时间短,是一种提取洋葱皮中阿魏酸的适宜方法.