Optimization of Microwave-assisted Extraction of Syringin and Oleuropein from Syringa reticulata

Abstract

We used microwave-assisted extraction to extract syringin and oleuropein from Syringa reticulate,and optimized the extraction process by the Box-Behnken response surface method. The order of the effect of factors on the yield of syringin and oleuropein was the concentration of ethanol the microwave time microwave power. The optimum conditions for the extraction were as follows: soaking time of 1 h,ethanol concentration of45%,ratio of solid to liquid of 1 ∶ 20 g ·m L~(-1),microwave output power of 600 W,and extraction time of 5min. With the optimum extraction conditions,the yield of syringin and oleuropein from Syringa reticulate was5. 28% ± 0. 102%. The microwave-assisted extraction was efficient and rapid for extraction syringin and oleuropein from Syringa reticulate,and was benefit for the comprehensive utilization of Syringa reticulate.