PROBLEM TO BE SOLVED: To provide a method for producing a purified tea extract, by which non-polymerized catechins can be recovered in a good yield.SOLUTION: This method for producing the purified tea extract comprises the following processes (1) to (4): (1) the process for hydrolyzing a tea extract (2) the process for bringing the hydrolyzed tea extract into contact with a synthetic adsorbent to adsorb a non-polymerized catechins in the tea extract to the synthetic adsorbent (3) the process for washing the synthetic adsorbent with &le20°C water and (4) the process for bringing the synthetic adsorbent into contact with a &le20°C aqueous organic solvent solution to elute the non-polymerized catechins.COPYRIGHT: (C)2011,JPO&INPIT【課題】非重合体カテキン類を収率よく回収できる精製茶抽出物の製造方法を提供すること。【解決手段】本発明の精製茶抽出物の製造方法は、次の工程(1)~(4):(1)茶抽出物を加水分解する工程、(2)加水分解後の茶抽出物を合成吸着剤に接触させ、該茶抽出物中の非重合体カテキン類を合成吸着剤に吸着させる工程、(3)合成吸着剤を20℃以下の水で洗浄する工程、及び(4)合成吸着剤に20℃以下の有機溶媒水溶液を接触させて非重合体カテキン類を溶出させる工程を含むことを特徴とする。【選択図】なし
