CO_2超临界萃取法提取艾叶挥发油工艺研究

目的:优选CO_2超临界萃取法提取艾叶挥发油的工艺条件,进一步提高艾叶挥发油的得率与品质。方法:采用正交试验法考察工艺,考察因素为萃取压力(A)、萃取温度(B)、分离压力(C)和分离温度(D),每个因素取3个水平,以挥发油得率和桉油精含量为考察指标,两个指标加权分析,对艾叶挥发油的提取工艺进行筛选。结果:艾叶挥发油最佳提取条件为萃取压力20 m Pa,萃取温度30℃,分离压力8 m Pa,分离温度55℃,平均挥发油得率为1.443%,平均桉油精含量为0.318 mg·g~(-1)。结论:筛选出CO_2超临界萃取法的提取工艺得油率高,桉油精含量也高,综合评价工艺稳定可行,可为实际生产提供依据。

Supercritical CO2 Extraction Technology of Volatile Oil of Mugwort Leaf Research

Objective:Optimizing the CO2 supercritical fluid extraction method to extract the volatile oil of artemisia argyi process conditions,further improve the moxa leaf essential oil yield and quality.Methods:Using orthogonal experiment method investigation process,factors of extraction pressure (A),extraction temperature (B),separation pressure (C) and temperature (D),and each factor in three levels,with the essential oil yield and the content of eucalyptol as examining index of artemisiae argyi filtered the extraction process of volatile oil.Results:Mugwort volatile oil the best extraction conditions for the extraction pressure of 20 MPa,extraction temperature 30 ℃,separation pressure is 8 MPa,separation temperature of 55 ℃,the average volatile oil yield was 1.443％,the average content of eucalyptol was 0.318 mg · g-1.Conclusion:The extraction process of supercritical CO2 extraction is screened out high oil rate,high eucalyptol content,the comprehensive evaluation process is stable and feasible and which can provide the basis for practical production.