The antioxidative capacity of lavender oil was examined through DPPH, hydroxy radical, superoxide anion, While the lavender oil extracted by supercritical CO2 extraction was more efficacious than the one extracted by steam distillation method. Conclusion The lavender oil Which was extracted through CO2 extraction method has better antioxidation capacity.
1. 2-0. 4% of the entrainment agent is sprayed into the lavender, and then the lavender is added to the extraction kettle, and the continuous extraction is carried out with a supercritical carbon dioxide fluid to control the temperature of the extraction kettle at 40-55 ° C. The extraction pressure is 10-30 MPa, and the extraction time is 1-3 hours;
2. The singularity of the first stage separator is 8. 5-9. 5MPa, first stage, the first stage separator pressure is 8. 5-9. Separator temperature 0-20 ° C; secondary separator pressure 6-8 MPa, secondary separator temperature 25-40 ° C; discharge waxy components from the primary separator; discharge lavender oil from the secondary separator, After the emulsion is heated and the aqueous phase is separated, the finished lavender essential oil is obtained; the entraining agent in the step (1) is composed of the following components in parts by weight: 100 parts of ethanol, 10-20 parts of 3-octanone, 4-pine Oleene alcohol 30-50 parts.