Study on the Extraction Technique of Flavonoids from Perilla Oil Meal by Ultrasonic Method

To determine the optimum extraction conditions of flavonoids from perilla oil meal,extract flavonoids from perilla oil meal by ultrasonic extraction method,research the effects of four factors such as ethanol concentration,ratio of material and liquid,ultrasonic time and ultrasonic temperature on the extraction rate of flavonoids,and the optimum extraction conditions are determined by orthogonal test.The results show that the optimum extraction technique of flavonoids in perilla oil meal is:60% of ethanol concentration,solid-liquid ratio of 1∶30,ultrasonic time of 30min,ultrasonic temperature of 75℃,the extraction rate of flavonoids is 2.91% under such conditions.