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

摘要

[Problem] To provide a method for producing an ascorbic acid 2-glucoside anhydrous crystal-containing powder with which it is possible to produce a powder that will not show significant solidification, even when the percentage of ascorbic acid 2-glucoside produced is less than 35 mass%. [Solution] A method for producing an ascorbic acid 2-glucoside anhydrous crystal-containing powder comprising a step in which a solution containing either liquefied starch or dextrin and L-ascorbic acid is exposed to CGTase and then to glucoamylase in order to obtain a solution wherein the percentage of ascorbic acid 2-glucoside produced is 27 mass% or greater; a step for purifying the resulting solution such that the ascorbic acid 2-glucoside content exceeds 86 mass%; a step for precipitating the ascorbic acid 2-glucoside anhydrous crystals by controlled cooling or semi-controlled cooling; and a step for recovering, aging, and drying the precipitated ascorbic acid 2-glucoside anhydrous crystals.