Optimization of ethanol modified supercritical carbon dioxide on the extract yield and antioxidant activity from Biebersteinia multifida DC

- Essential oil components were extracted from Biebersteinia multifida DC using supercritical carbon dioxide.
- GC-MS and FID analysis in conjunction with response surface to evaluate the effects of variables was applied.
- The optimum extraction yield and DPPH EC50 via SFE method were 96% (w/w) and 27.19, respectively.