[Optimization on ultrasonic extraction technology of total coumarines in cortex fraxini].

To optimize the ultrasonic extraction technology of total coumarins in Cortex Fraxini.The effects of ethanol concentration, ratio of solid to liquid, extraction temperature, ultrasonic frequency and extraction time in extraction procedure on the extraction rate of total coumarins in Cortex Fraxini was researched by single factor experiment, the optimal extraction technology was determined by orthogonal experiment.The optimal extraction...