Study On Analysis,Extraction And Microencapsulation Of Lavender Essential Oil

In this paper,the essential oil extracted from the lavender of five different areas in China was studied and analyzed,and then the supercritical carbon dioxide fluid extraction method was used to guide the extraction of lavender essential oil.The extraction conditions were optimized by single factor and response surface method.The microcapsules using ?-cyclodextrin as the wall material and the lavender volatile oil core material were prepared by inclusion complexation method.The main contents of this thesis are as follows:Analysis and comparison of lavender essential oil from five different habitats: selected lavender essential oil in Sanya,Shaanxi,Fujian,Xinjiang and Yunnan,the characteristic aroma components of lavender essential oil from five different habitats were identified by different analysis methods;the relationship between the characteristic compounds of lavender essential oil in different habitats and the content and sense of aroma components were analyzed.According to sensory analysis,according to the quantitative description of sensory analysis,30 characteristic odorant active compounds are analyzed by time intensity method and GC-O method.The characteristic aroma components of limonene,linalool,camphor acetate and camphor are the essential oils of lavender essential oil.The extraction of Xinjiang by supercritical carbon dioxide extraction Lavender in Yili was optimized by single factor and response surface method.The optimum extraction conditions of lavender volatile oil were obtained by supercritical carbon dioxide extraction: the extraction flow rate: 17 g/min,extraction pressure: 250 Bar,extraction temperature: 51 C,extraction time: 2 h.with beta cyclodextrin as wall material and supercritical extract of Lavender In order to optimize the preparation conditions of lavender volatile oil microcapsule,the main and secondary factors affecting the preparation of microcapsules are in order of inclusion temperature > stirring speed > core wall ratio.The optimum conditions of orthogonal optimization are: core wall ratio 4:1,encapsulation temperature 45 C,inclusion The speed 500 rpm.blank microcapsule is not very regular under the microscope,the surface is not very smooth and the dispersion is not very uniform,but the lavender microcapsule presents the parallel quadrilateral,diamond and rectangular polygons,the surface is smooth and the dispersion is more uniform.The blank microcapsule is observed under scanning electron microscope and observed under the microscope.Similarly,the crystal structure,which does not escape the rules,is not too smooth and uneven,while lavender microcapsules present a regular cube structure,and the dispersion is relatively uniform and the surface is smooth.