METHOD FOR PRODUCING POWDERS COMPRISING ANHYDROUS CRYSTALLINE 2-O-α-D-GLUCOSYL-L-ASCORBIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for producing powders containing anhydrous crystalline ascorbic acid 2-glucoside that does not significantly cake even when the production yield of ascorbic acid 2-glucoside does not reach 35 mass%.SOLUTION: A method for producing powders containing anhydrous crystalline ascorbic acid 2-glucoside includes the processes of: allowing a CGTase to act on a solution containing either liquefied starch or dextrin and L-ascorbic acid and then allowing a glucoamylase to act on the resulting solution to obtain a solution with an ascorbic acid 2-glucoside production yield of at least 27 mass%; purifying the obtained solution to increase the ascorbic acid 2-glucoside content to a level of >86 mass%; precipitating anhydrous crystalline ascorbic acid 2-glucoside by a controlled cooling method or pseudo-controlled cooling method; and collecting the precipitated anhydrous crystalline ascorbic acid 2-glucoside, aging and drying the collected glucoside.