Objective: To optimize the extraction process of volatile oil from Angelicae Sinensis Radix and fit its extraction kinetic model equation

and then to detect chemical components in volatile oil and aromatic water.Method: The improved extractor of volatile oil was adopted

extraction process of volatile oil from Angelicae Sinensis Radix was optimized by response surface methodology

then the extraction rate of volatile oil was fitted and the regression equations were calculated.Components in light oil

heavy oil and emulsified aromatic water during the extraction process of volatile oil were determined by GC-MS

in order to find out the chemical material base for formation of emulsification.Result: Optimal extraction process was as follows:extracting time of 8.55 h

solid-liquid ratio of 1:10

soaked 1.82 h;extraction rate of volatile oil was(0.70±0.01)%.Kinetic equations of optimal technology were V=0.72(1-e-0.000 74t) (R2=0.996 7) and ln(0.72-V)=-0.014 1t-0.349 3(R2=0.998 7).Components in aromatic water were different from those in volatile oil from Angelicae Sinensis Radix

especially for 2-vinyl-4-methoxyphenol.Conclusion: This optimized extraction process is feasible and stable

two extraction dynamics equations can be fitted to its extraction process

components in aromatic water have a larger difference with those in volatile oil.