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| 亚临界萃取文冠果籽油工艺的响应面优化 |
| Optimization of subcritical extraction of Xanthoceras sorbifolia Bunge. seed oil by response surface methodology |
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| DOI： |
| 中文关键词: 文冠果籽油 亚临界萃取 响应面优化 气相色谱 |
| 英文关键词:Xanthoceras sorbifolia Bunge.seed oil subcritical extraction response surface optimization gas〖JP〗chromatography |
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| 中文摘要: |
| 探讨了亚临界萃取文冠果籽油的工艺条件，通过单因素实验研究原料粒度、萃取温度和萃取时间对提油率的影响，在此基础上，采用Box-Behnken设计响应面实验，优化确定最佳工艺条件。结果表明，在四氟乙烷(R134a)为溶剂、萃取压力1.0 MPa、萃取次数3次下，亚临界萃取文冠果籽油的最佳条件为：原料粒度66目、萃取温度41℃、萃取时间56 min，在此条件下提油率为97.18%。文冠果籽油理化性质测定结果表明，其酸值(KOH)为0.8 mg/g，过氧化值为0.20 g/100 g，总砷含量小于0.01 mg/kg，铅含量小于0.005 mg/kg，溶剂残留未检出，相对密度为0.929 3，折光指数为1.471。利用气相色谱分析文冠果籽油的脂肪酸组成，共鉴定出13种脂肪酸，主要是棕榈酸（6.10%）、油酸（28.77%）、亚油酸（45.62%）、二十碳烯酸（6.78%）、硬脂酸（1.79%），其中不饱和脂肪酸占总组分的81.91%。 |
| 英文摘要: |
| The subcritical extraction conditions of oil from Xanthoceras sorbifolia Bunge.seed were studied.The effects of raw material granularity，extraction temperature and extraction time on oil extraction rate were studied by single factor experiment，and the subcritical extraction conditions were optimized by response surface methodology designed by Box-Behnken principle.The results showed that when tetrafluoroethane（R134a）was used as solvent，extraction pressure was 1.0 MPa and extraction times was three，the optimal subcritical extraction conditions were obtained as follows：granularity of raw material 66 meshes，extraction temperature 41℃ and extraction time 56 min.Under the optimal conditions，the oil extraction rate reached 97.18％.The detection results of physicochemical properties of Xanthoceras sorbifolia Bunge.seed oil indicated that the acid value and peroxide value were 0.8 mgKOH/g and 0.20 g/100 g respectively，the contents of total arsenic and lead were below 0.01 mg/kg and 0.005 mg/kg respectively，the relative density and refractive index were 0.929 3 and 1.471 respectively，and no residual solvent was detected.The fatty acid composition of Xanthoceras sorbifolia Bunge.seed oil was analyzed by gas chromatography，and thirteen kinds of fatty acids were identified as palmitic acid (6.10%)，oleic acid (28.77%)，linoleic acid (45.62%)，eicosenoic acid(6.78%) and stearic acid(1.79%)，in which the content of unsaturated fatty acids was 81.91%. |
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