| 摘要: |
| 以苹果籽为原料,应用CO2超临界流体萃取技术,采用单因素试验考察了投料量、原料破碎度、萃取压力、萃取温度、CO2流量、萃取时间等对CO2超临界流体萃取的影响,并利用气相色谱分析了苹果籽油的组成及其含量。结果表明,苹果籽油的CO2超临界流体最佳萃取条件为:投料量300 g,原料破碎度0.297 mm,萃取压力35 MPa,萃取温度30～35 ℃,CO2流量25 kg/h,萃取时间2 h,在此条件下苹果籽油萃取率可达22.85%;苹果籽油中总不饱和脂肪酸相对含量为91.81%,其中油酸32.27%,亚油酸59.54%。 |
| 关键词: 苹果籽油 CO2超临界流体 萃取 脂肪酸 |
| DOI： |
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| 基金项目:西北农林科技大学科研专项（08080234） |
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| Analysis of supercritical-CO2 fluid extraction and fatty acid contents of apple seeds oil |
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| Abstract: |
| Supercritical CO2 fluid extraction was applied to apple seeds extraction.The effect of factory grinding granularity,material weights,extraction pressure,extraction temperature,carbon dioxide flow rate,extracting time on the supercritical extraction were worked out via single factor experiments and the components of apple seeds oil were separated and identified by gas chromatograph (GC).The results showed the optimum technological condition of extraction:material weight 300 g,grinding granalarity 0.297mm;working pressure 35 MPa,extraction temperature 30-35 ℃,carbon dioxide flow rate 25 kg/h,extraction time 2 h.Under this condition,the extraction rate of apple seeds oil is 22.85%;in the fatty acids the unsaturated fatty acids were 91.81%，in which the content of oleinic acid and linoleic acid were 32.27% and 59.54% respectively. |
| Key words: apple seed oils,supercritical carbon dioxide,extraction,fatty acid |
