| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for industrially producing gallic acid-containing composition with low iron content.SOLUTION: A method for obtaining a composition highly containing gallic acid with low iron content in high yield is developed, although in the method, refining is performed using such an inexpensive and easy process that crude crystals obtained from microorganism-cultured material is dissolved in a hot water at a temperature of 60°C or higher and is crystallized again. |
