Optimization of ultrasonic-assisted extraction of oil from Paeonia suffruticosa Andr.seeds and its GC-MS analysis

Objective:The ultrasonic-assisted extraction technology was used to extract the seeds of Paeonia suffruticosa Andr.Method:The single factor and orthogonal design experiments were adopted to study the effects of such factors liquid-solid ratio,ultrasonic power,extraction temperature and time on oil extraction rate.The seeds oil was analyzed by GC-MS to determine constituents.Result:The optimal technological condition of oil extraction was determined and the parameters of oil extraction using petroleum ether with boiling rang of 60~90℃ as the solvent should be as follows:the liquid-solid ratio was 8mL/g,the ultrasonic power was 350W,the extraction temperature was 40℃,the extraction was 30min,and under such condition,the total oil extraction rate after three times extractions is 24.89%.Conclusion:Based on the results of GC-MS analysis,unsaturated fatty acids such as linoleic acid and linolenic acid abound in Paeonia suffruticosa Andr.seeds,the content of linoleic acid and linolenic acid were 22.78% and 64.14%,respectively.