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| 不同提取方法对西藏野桃仁油品质的影响 |
| Effects of different extraction methods on the properties of Tibet Prunus mira nut oils |
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| DOI： |
| 中文关键词: 西藏 野桃仁油 脂肪酸 活性成分 氧化稳定性 |
| 英文关键词:Tibet Prunus mira nut oil fatty acid active constituent oxidation stability |
| 基金项目:西藏自治区科技重大专项（XZ201901NA04）； 西藏农牧学院食品科学与工程重点学科建设项目（2017ZDXK-01） |
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| 中文摘要: |
| 分别采用水剂法、正己烷提取法、超临界CO2萃取法、压榨法提取西藏野桃仁油。通过分析不同方法提取的野桃仁油的提取率、理化性质、脂肪酸组成及含量、生育酚与甾醇的组成及含量、角鲨烯含量、氧化稳定性，探讨不同提取方法对西藏野桃仁油品质的影响。结果表明：正己烷提取法的提取率最高，达到(98.42±0.79)%；提取方法对野桃仁油的折光指数、气味影响不大，对碘值、酸值、皂化值、过氧化值有较大影响，对野桃仁油脂肪酸组成无显著影响，而超临界CO2萃取的野桃仁油含有奇数碳脂肪酸；正己烷提取法提取的野桃仁油中生育酚、甾醇、角鲨烯含量最高；4种方法提取的野桃仁油在25 ℃的预测货架期依次为水剂法＞正己烷提取法＞超临界CO2萃取法＞压榨法。 |
| 英文摘要: |
| The aqueous extraction, n-hexane extraction, supercritical CO2 extraction and pressing extraction were used to extract Tibet Prunus mira nut oil, and the effects of different extraction methods on the properties of Prunus mira nut oil were studied by comparing extraction rate, physicochemical properties,fatty acid composition and content, content and composition of tocopherol and sterol, squalene content and oxidation stability of Prunus mira nut oil. The results showed that the extraction rate of Prunus mira nut oil obtained by n-hexane extraction was the highest，reaching (98.42±0.79)%.Extraction method had little influence on the refractive index and odor of the oil, but had significant influence on the iodine value, acid value, saponification value and peroxide value. There was no significant effect on the composition of fatty acids in the oils. Odd carbon fatty acids were presented in the oil with supercritical CO2 extraction, and the contents of tocopherol, sterol and squalene were highest in the oil obtained by n-hexane extraction. The predicted shelf lives at 25 ℃ of Prunus mira nut oils extracted by the four methods were in the order of aqueous extraction> n-hexane extraction > supercritical CO2 extraction > pressing extraction. |
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