沙葱籽油的超临界CO_2萃取及成分分析_张君萍 . Supercritical Fluid C02 Extraction and Composition Analysis of Allium mongolicum Seed Oil

Abstract

Supercritical fluid CO2 extraction was applied to extract oil from Allium mongolicum seeds.Based on single factor experiments,the effects of extraction pressure,extraction temperature,extraction time and CO2 flow rate on extraction rate of Allium mongolicum seed oil were explored by orthogonal design.The results indicated that the optimal extraction conditions were extraction pressure of 35 MPa,extraction temperature of 45 ℃,extraction time of 120 min and CO2 flow rate of 35 kg/h.Under the optimal extraction conditions,the extraction rate of Allium mongolicum seed oil was 15.00%.GC-MS analysis showed that fatty acids in Allium mongolicum seed oil were composed of 86.65% unsaturated fatty acids and 13.35% saturated fatty acids.Furthermore,linoleic acid(63.24%),oleic acid(15.99%) and palmitic acid(7.93%) were major fatty acids in Allium mongolicum seed oil.Therefore,supercritical fluid CO2 extraction can provide excellent physico-chemical properties,high purity and quality for Allium mongolicum seed oil.