PROBLEM TO BE SOLVED: To provide a production method of a purified tea extract excellent in solubility of non-polymer catechin to a high-concentration organic solvent, and having high purity of the non-polymer catechin.SOLUTION: In a production method of purified tea extract, in a step for mixing a tea extract, a mixed solvent in which the mass ratio between an organic solvent (ethanol) and water is 90/10-97/3, and carboxylic acid (citric acid) which is dicarboxylic acid or tricarboxylic acid of a quantity having pH of 4.9-5.5, a used amount of the mixed solvent is 1-10 mass times to a solid content of the tea extract.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】高濃度の有機溶媒に対する非重合体カテキン類の溶解性に優れ、かつ非重合体カテキン類の純度の高い精製茶抽出物の製造方法の提供。【解決手段】茶抽出物と、有機溶媒(エタノール)と水との質量比が90/10~97/3の混合溶媒と、pH4.9~5.5となる量の、ジカルボン酸又はトリカルボン酸であるカルボン酸(クエン酸)とを混合する工程において、混合溶媒の使用量が前記茶抽出物の固形分に対して1~10質量倍である、精製茶抽出物の製造方法。【選択図】なし
