There are many commonly used extraction methods for Chinese medicine. The extraction of Chinese medicine with different chemical components should choose the appropriate method. Common extraction methods include: water extraction, organic solvent extraction, acidic or alkaline organic solvent extraction, steam distillation, enzymatic hydrolysis or inhibition of enzymatic hydrolysis, chemical treatment, sublimation extraction, supercritical extraction, ultrasonic extraction, microwave-assisted extraction.
Most Chinese medicine extraction uses extraction processes such as stirring extraction or pump circulation dynamic extraction, because stirring and fluid solvent extraction can improve the extraction effect and extraction speed. Due to the increase in concentration difference and the pressure at the inner end of the medicinal material capillary is greater than the pressure at the outer end, the extract inside the medicinal material continuously flows through the capillary into the solvent.