METHOD FOR PRODUCING 2-O-α-D-GLUCOSYL-L-ASCORBIC ACID ANHYDROUS CRYSTAL-CONTAINING POWDER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an ascorbic acid 2-glucoside anhydrous crystal-containing powder which can significantly produce hardly solidifying powder even when the formation rate of ascorbic acid 2-glucoside is less than 35 mass%.

SOLUTION: The method for producing an ascorbic acid 2-glucoside anhydrous crystal-containing powder includes the steps of: making CGTase and starch debranching enzyme act to a solution containing either liquefied starch or dextrin and L-ascorbic acid and subsequently making glycoamylase on the same in order to obtain a solution in which the formation rate of ascorbic acid 2-glucoside is 33 mass% or greater; purifying the obtained solution such that the ascorbic acid 2-glucoside content exceeds 86 mass%; precipitating the ascorbic acid 2-glucoside anhydrous crystals by a controlled cooling method or a semi-controlled cooling method; and recovering, aging, and drying the precipitated ascorbic acid 2-glucoside anhydrous crystals.

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