Separation of rebaudioside A from stevia glycosides using chromatography

A method of separating rebaudioside A from stevioside using chromatography, the method comprising the steps of:

• (a) providing a glycoside solution comprising rebaudioside A;
• stevioside;
• and a solvent;
• (b) providing an adsorbent comprising a polystyrene divinylbenzene support functionalized with tertiary amines, quaternary amines, or both tertiary and quaternary amines;
• and
• (c) contacting the adsorbent with the glycoside solution in order to separate at least a portion of the rebaudioside A from the stevioside thereby resulting in the formation of a purified rebaudioside A solution.