超声波辅助提取洋葱精油的研究

Study on Technology of Extracting of Onion Essential Oil by Synchrotron Radiation Method

试验以精油得率为评价指标,进行了洋葱精油的超声波辅助萃取工艺研究,考察了萃取溶剂种类、料液比、萃取温度、萃取时间和超声波功率对精油得率的影响,并在单因素试验基础上,通过正交试验设计优化了工艺条件。试验结果表明:在以二氯甲烷为萃取溶剂,萃取温度35℃,萃取时间4 h,料液比1∶1(g/m L),超声波功率70%的条件下可得到最优工艺条件;影响精油产率各因素的主次顺序为萃取时间>超声波功率>料液比>萃取温度;超声波辅助浸提洋葱精油的得率是普通溶剂萃取法的3~4倍。

With the yield of essential oil as the evaluation index, the technology of extracting of onion essential oil by ultrasonic- assisted extraction method was studied. The effects of extracting solvent, extracting temperature, extracting time and the rate of raw material and solvent on the yield of onion essential oil were investigated. When CH2Cl2 was the optimal extracting solvent, the optimal conditions of ultrasonic-assisted extraction onion oil were obtained by orthogonal experiments, which was extracting temperature 35 ℃, extracting time 4 h, the rate of raw material and solvent 1 ： 1 （g/mL）, and ultrasonic power 70%, respectively. The influencing order of various factors on the yield was essential oil extraction time 〉ultrasonic power〉 solid- liquid rati〉extraction temperature, and ultrasonic assisted extraction of onion essential oil yield was 3-4 times of ordinary solvent extraction.