Study on Ultrasound-assisted Extraction Optimization of Pumpkin Seed Oil

Pumpkin seed oil was extracted by ultrasound method,in this study.Effects of extraction solvent,extraction temperature,and extraction time,ratio of liquid to material,ultrasonic frequency and power on oil yield were investigated by single-factor test and orthogonal design.The results showed that the optimal extraction solvent is petroleum ether.The significance sequence of other five factors affecting oil yield is as follows:ratio of liquid to material extraction time extraction temperature frequency and power of ultrasound,and their optimum levels are 6:1(V/W),35 min,60 ℃,59 kHz and 280 W,respectively.Under these conditions,the oil yield reaches 39.04%.