| 王羚.超临界CO2萃取对油茶饼中油脂品质及茶皂素理化特性影响的研究[J].中国油脂,2020,45(8):109~114.[WANG Ling.Effects of supercritical CO2 extraction on the quality of oil and physicochemical properties of tea saponin in oil-tea camellia seed cake[J].China Oils and Fats,2020,45(8):109~114.] |
| 超临界CO2萃取对油茶饼中油脂品质及茶皂素理化特性影响的研究 |
| Effects of supercritical CO2 extraction on the quality of oil and physicochemical properties of tea saponin in oil-tea camellia seed cake |
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| DOI：10.12166/j.zgyz.1003-7969/2020.08.022 |
| 中文关键词: 油茶饼 超临界CO2萃取 油茶籽油 品质 茶皂素 |
| 英文关键词:oil-tea camellia seed cake supercritical CO2 extraction oil-tea camellia seed oil quality tea saponin |
| 基金项目:浙江省科技重点研发计划（2017C02003）;中国林科院亚林所基金重点项目（185003） |
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| 中文摘要: |
| 以油茶饼为原料，采用超临界CO2萃取法进行脱油和茶皂素的提取，通过单因素实验和响应面分析对提取工艺进行优化，同时对油茶籽油的理化性质、营养品质及茶皂素特性进行分析。结果表明：最佳萃取工艺条件为萃取温度45 ℃、萃取压力30 MPa、萃取时间3.5 h、夹带剂（乙醇）体积分数75%，此条件下茶皂素提取率为89.21%。超临界CO2萃取油茶籽油的酸价、过氧化值和皂化值低于有机溶剂提取的，油中α-生育酚、角鲨烯、β-谷甾醇含量高于有机溶剂提取的。超临界CO2萃取茶皂素的表面张力和接触角较小，发泡能力和乳化性较好。 |
| 英文摘要: |
| Supercritical CO2 extraction method was used to remove oil and extract tea saponin from oil-tea camellia seed cake. The extraction process was optimized by single factor experiment and response surface methodology. The physicochemical properties and nutritional quality of the extracted oil and characteristics of tea saponin were analyzed. The results showed that the optimal extraction conditions were obtained as follows: extraction temperature 45 ℃, extraction pressure 30 MPa, extraction time 3.5 h and volume fraction of entrainer ethanol 75%. Under the optimal conditions,the extraction rate of tea saponin was 8921%. The acid value, peroxide value and saponification value of oil extracted by supercritical CO2 were lower than that extracted by organic solvent, while the contents of α-tocopherol, squalene，β-sitosterol were higher. The surface tension and contact angle of tea saponin extracted by supercritical CO2 were small, and the foaming ability and emulsifying ability were better. |
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