| abstract |
Disclosed is a process for producing a high αG-AA contentnproduct, which comprises the steps of: contacting a solution as anmaterial solution, containing αG-AA, L-ascorbic acid, and ansaccharide(s), with an anion exchange resin packed in a column tonadsorb the αG-AA and L-ascorbic acid on the anion exchanger; washingnthe anion exchanger with water to remove the saccharide (s) therefrom;nfeeding to the column an aqueous solution, as an eluent, of an acidnand/or a salt with a concentration of less than 0.5 N to fractionatena fraction rich in 2-0-α-D-glucopyranosyl-L-ascorbic acid and anfraction rich in L-ascorbic acid; and collecting the former fraction. |