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目的:研究从磨芋中提取磨芋脂溶性成分的超临界CO_2最优工艺及成分分析。方法:以磨芋脂溶性成分收率为评价指标,采用正交设计试验法优化超临界CO_2萃取磨芋脂溶性提取物的工艺参数,并采用GC-MS对提取物进行成分分析。结果:超临界CO_2萃取磨芋脂溶性成分的最佳工艺条件为:萃取压力28 MPa、萃取温度60℃,分离釜Ⅰ压力15 MPa、分离釜Ⅰ温度50℃,分离釜Ⅱ压力6 MPa、分离釜Ⅱ温度45℃,萃取时间1.5 h。磨芋脂溶性成分平均收率为1.086%。对磨芋脂溶性成分进行GC-MS分析,共鉴定了38种化合物,主要为脂肪酸成分。结论:与乙醇浸渍法相比,超临界CO_2萃取具有萃取收率高、萃取时间短、脂肪油比较澄明等优点,二者之间成分的种类存在较大差异。
OBJECTIVE: To study the optimal technology and composition of supercritical CO_2 extracted from ground taro. Methods: Taking the yield of soluble fractions of konjac as evaluation index, the orthogonal design test was used to optimize the technological parameters of supercritical CO 2 extraction of konjac liposoluble fractions, and the constituents were analyzed by GC-MS. Results: The optimum conditions for the extraction of fat-soluble constituents from the ground carambola were as follows: extraction pressure 28 MPa, extraction temperature 60 ℃, separation vessel I pressure 15 MPa, separation vessel I temperature 50 ℃, separation vessel Ⅱ pressure 6 MPa, separation The temperature of kettle Ⅱ was 45 ℃ and the extraction time was 1.5 h. The average yield of milled fat soluble fraction was 1.086%. GC-MS analysis of fat-soluble constituents of the kernal found a total of 38 compounds, mainly fatty acid components. Conclusion: Compared with ethanol impregnation, supercritical CO_2 extraction has the advantages of high extraction yield, short extraction time, and relatively stable fatty oil. The types of the components are quite different.