辣木籽油的超临界CO_2萃取及其化学成分分析_段琼芬 . Extraction of Moringa oleifear seed oil by SCF-CO_2 and analysis of its constituent

Abstract

Moringa oleifear seed oil was extracted by supercritical fluid-CO2(SCF-CO2) and its constituents were analyzed by GC-MS.The effects of extraction time,pressure,temperature,CO2 flow rate and separate temperature on the oil yield were studied and the optimal conditions were determined by orthogonal experiments.The optimal conditions were as follows:extraction time 180 min,extraction pressure 20 MPa,CO2 flow rate 20 kg/h,extraction temperature 35℃,separate temperature 40℃.At the conditions,the oil yield was 36.3% and the oil yield efficiency was 97%.GC-MS analysis revealed that the main constituent of the oil was fatty acid amounted to 92%,among which oleic acid was 65.63%.In addition,the oil contained 1%-3% saturated hydrocarbons,1.76% carbonyls and ether,2.85% ester,and 1.95% campesterol,β-sitosterol and fucosterol.This study showed that Moringa oleifear seed oil was rich in functional components such as oleic acid and sterol.