Objective: To optimize extraction technology of Xiangcao Guchi tincture. Method: Using the content of α-cyperone and wedelolactone in extraction liquid and yield of dry extract as indexes

the content of them were determined by HPLC

yield of extract was determined by baking method

ethanol percolation method was used

orthogonal test was used to optimize extraction process conditions with the concentration of ethanol

immersion time and velocity as factors. Result: Optimum extraction conditions were as follows: The concentration of ethanol 60%

velocity was 5 mL·min-1

and impregnated percolation time was 24 h. Conclusion: Optimized extraction technology was stable and reasonable

it could apply to industrial production.