THE SYNTHESIS AND CHARACTERIZATION OF SOME POROUS RESINS AND THEIR ADSORPTION PROPERTY ON STEVIA GLYCOSIDES

摘要

A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides were studied in detail.After the selective adsorption of PYR resins,the rebaudioside A could be separated from the other components of the stevia glycosides,and a new method for obtaining pure rebaudioside A is reported.