High purity capsaicin is in great demand in the fields of medicine and food.The multi-element valued model is used to evaluate four capsaicin extraction technologies including solvent extraction

supercritical fluid extraction

coupled solvent-supercritical extraction and coupled solvent-ion exchange route.The results confirm that coupled solvent-ion exchange route is the optimal technological process

preceding other routes obviously.Experimental study on the coupled solvent-ion exchange route shows that the optimum parameters for capsaicin extraction are:initial concentration 331.4 mg·L-1

flow rate 18.8 ml·min-1

pH 5.0

and room temperature.The column purification parameters such as the solution concentration and velocity with its effects are also obtained

and the capsaicin purity of final production reaches 98.42%.