Abstract: To study the absorption and separation of the macroporous resin for flavonoids from sweet potato vines (FSPV). Eight types of macroporous resin were selected to compare their performances in absorbing and desorbing FSPV. The optimal type for FSPV was decided, meanwhile, its kinetic curve and dynamic absorbing behavior were studied. Experimental resultsshowed that AB-8 resin possesses higher absorption and desorption capacity. The appropriate adsorption conditions were: the range of the sample concentration was 0.6～1.0mg/ml, pH was 4.28 or so and velocity of flow was 3ml/min .When 95% ethanol was used as eluant, the desorption capacity was 97%, and 4 BV eluant could desorb FSPV basically. AB-8 macroporous resin showed better comprehensive adsorption property. It can be used to purify and separate FSPV.

Key words: sweet potato vines, flavonoid, macroporous resin, adsorption and separation