超临界萃取香樟叶精油的工艺研究

目的:优选超临界流体萃取法提取香樟叶精油的工艺条件。方法:将自然干燥的香樟叶剪成约6 cm×1 cm大小的片状,以萃取温度、萃取压力和萃取时间为研究对象,在单因素试验的基础上,进行三因素三水平正交试验。以香樟叶精油萃取率为评价指标,优选超临界流体萃取香樟叶精油的工艺条件。结果:正交试验结果显示最佳萃取条件为萃取温度45℃,萃取压力15 MPa,萃取时间90 min。在该萃取条件下,香樟叶精油的萃取率为10.2%。结论:超临界流体萃取法提取香樟叶精油具有较高的萃取率,最佳萃取条件是萃取温度45℃,萃取压力15 MPa,萃取时间90 min,且萃取压力对萃取率的影响具有显著性差异。

Supercritical fluid extraction technology for Cinnamomum camphora leaf oil

Objective：To optimize the oil extraction procedure from Cinnamomum camphora leaves by supercritical fluid extraction.Methods：By air drying,the leaves were cut into pieces by sizes of 6 cm×1 cm.The experiment started with single factor test of the extraction effects associated with temperature,pressure and time on extraction yields before applying orthogonal experiment to optimizing the three factors.Results：Orthogonal test showed that the optimum extraction conditions were involved in temperature at 45 ℃,pressure by 15 MPa and time for 90 min,and that processing technique could harvest the oil from Cinnamomum camphora leaves by 10.2%.Conclusion： Oil extraction from Cinnamomum camphora leaves by supercritical fluid processing can be productive under the optimum conditions described above.Of the three factors,extraction temperature may greatly affect the oil output.