MANUFACTURING METHOD FOR PURPLE SWEET POTATO GRAIN DRINK

摘要

PURPOSE: A producing method of purple sweet potato grain drink is provided to offer massive amount of anthocyanin pigments with the high anti-oxidation activity in purple sweet potato. CONSTITUTION: A producing method of purple sweet potato grain drink comprises the following steps: removing foreign materials from the surface of purple sweet potato(S10); peeling the purple sweet potato, and cutting(S20); mixing the cut purple sweet potato with sugar, oligosaccharide, and citric acid, and aging the mixture(S30); heating the aged mixture for 25~35minutes at 45~55deg C, for separating liquid portions and grains of the purple sweet potato(S40); steaming the separated purple sweet potato grains for 15~25minutes; cooking another purple sweet potato and crushing before inserting into the mixture(S50,S60); boiling the mixture for 7~13minutes, and vacuum packing(S70); and double boiling the mixture for 7~13minutes before cooling(S80).