香榧籽油的超临界萃取及其脂肪酸组成的比较分析研究_阙斐 . Extraction of Oil from Torreya grandis cv.Merrilli Seed with Supercritical CO2 and Comparison of its Fatty Acid with Other Four Vegetable Oils

Abstract

The seed of Chinese torreya(Torreya grandis cv.Merrilli) is a special rare native nut in China.The extraction of torreya seed oil with the supercritical carbon dioxide technique was carried out.Then its fatty acid was analyzed by GC-MS,and compared with olive oil,peanut oil,camellia oil and sesame oil.Results showed that the obtained optimum extraction conditions were under the conditions of pressure 30 MPa,extraction temperature 50 ℃,and time 2 h,and extraction yield rate was 16.2%.Linoleic acid and oleic acid are most abundant with mass fraction of 38.23% and 35.52%,followed by palmitic acid(7.45%) and sciadonic acid(7.41%).Sciadonic acid was an unusual bio-active fatty acid.The fat acid components of torreya seed oil were similar to sesame oil and had the richest varieties among the five vegetable oils analyzed.The MUFA(36.39%) and PUFA(49.80%) in torreya seed oil were relatively balanced.These data would be helpful for the further development and utilization of Chinese torreya seed oil as functional food.