正交试验优选薏苡茎中色素超声提取工艺

Optimizing ultrasonic extraction of Coix stems pigment by orthogonal experiment

目的:以超声波辅助法对薏苡茎色素提取进行研究,为利用薏苡资源提供理论依据。方法:通过单因素试验以及正交试验得到薏苡茎色素的最佳提取工艺。结果:试验得出超声波提取时间为9 min,液固比为15:1,超声波功率为120 W时色素提取率最好,为最佳提取方法。结论:原材料及试剂低廉易得,提取方法简便省时,提取效果重复性好。

Objective： Coix stems is used as the raw material. The Coix stems pigment in the method of ultrasound was researched, in order to provide the theory basis for making full use of the Coix stems resources. Methods： The process to the best extracting Coix stems pigment through single factor experiment and orthogonal experiment L9（3^4）. Results： The result which investigated in single factor test and orthogonal test L9（3^4） shows that the optimum conditions are the extraction reagent is solvent/reagent ratio is 15：1, ultrasound power at 120 W for 9 minutes. Conclusion： Raw materials and reagent is less-cost and easy to get, a simple method for extraction time, extraction repeatability.