【摘要】 本试验旨在采用超临界二氧化碳流体对杏仁油进行萃取。通过七因素二水平正交试验并对其结果进行单指标直观分析发现：浸泡时间短的出油率较高；粉度越小，出油率越高；以 1∶ 1搀和二氧化硅粉与杏仁的出油率较 1.5∶ 1的为高； 20MPa压力的出油率较 8MPa的略高等，在此基础上筛选出了最佳工艺路线。尔后对上述结果进行了六因素无交互作用方差分析，结果表明仅有浸泡时间对出油率的影响是显著的，浸泡的时间越短出油率越高，其余条件对出油率的影响并不显著，按其影响程度从大到小依次为粒度、二氧化硅与杏仁比例、压力、杏仁种类、流速。这与直观分析极差所示结果一致。最后液相色谱法测定显示萃取出的杏仁油中 95.41％的脂肪酸为不饱和脂肪酸。更多还原

【Abstract】 The study aims at extracting almond oil by supercritical CO2.27 factorial design was employed to screen the optimum processes to increase almond oil- extracting rate.The Yates algorithm analysis result indicated that almond with soaking shorter time produced higher yield;the finer the almond was crushed,the higher yield the oil extracted;mixing SiO2 powder with almond at ratio 1∶ 1 produced higher yield than that at 1.5∶ 1 ratio etc.Analysis of variance (ANOVA) result indicated that the only factor,which significantly contributed to the oil- extracting rate,is soaking time.At last HPLC analysis showed that almond oil extracted by supercritical CO2 is composed of 95.41％ unsaturated fatty acids.更多还原