超临界二氧化碳法萃取丝状真菌油脂及其成分测定

采用超临界二氧化碳装置萃取被孢霉油脂，研究了萃取温度、萃取压力、萃取时间和原料粒度对被孢霉油脂得率的影响。通过四因素三水平的正交试验确定了超临界萃取被孢霉油脂的最佳条件：温度40℃、压力20MPa、时间120min、原料粒度20～40目，油脂得率为46．08％（质量分数）。气相色谱检测油脂成分，其中棕榈酸占24．2％、油酸54．2％、亚油酸11．3％、γ-亚麻酸2．8％。

Supercritical Carbon Dioxide Extraction of Oil from Filamentous Fungus and Its Components Determination

Oil in Mortierella was extracted adopting supercritical CO_2 equipment, and the effects of extraction temper-ature, pressure, time, and material granularity on the yield of oil were studied, and the optimal eonditions of the ex-traction were eonfirmed through four factors and three levels orthogonal experiment, they were 40 ℃, 20 Mpa, 120 rain. And 20～40 mesh of granularity; and the yield of oil was 46.08% (mass fraction). The oil components were tested and determined with gas chromatography, they were 24.2% of palmitic acid, 54.2% of oleic acid, 11.3% of linoleic acid, and 2.8% of γ-linolenic acid.