PROBLEM TO BE SOLVED: To provide a method which easily and effectively purifies a green tea extract in a simple process and produces a purified green tea extract, improved in bitterness and an off-taste of an aftertaste derived from a non-polymer catechins even when the concetration of the non-polymer catechins in a solid content is high.SOLUTION: The method for producing the purified green tea extract includes making the green tea extract having concentration of 20-50 mass% of the non-polymer catechins in a solid content into an aqueous solution, and passing the green tea extract aqueous solution through a filtration membrane having less than 3,000 molecular weight cut-off.COPYRIGHT: (C)2012,JPO&INPIT【課題】緑茶抽出物を簡便な方法で容易に且つ効率良く精製し、固形分中の非重合体カテキン類濃度が高くても、非重合体カテキン類由来の苦味と後味の異味が改善された精製緑茶抽出物を製造する方法を提供すること。【解決手段】固形分中の非重合体カテキン類濃度が20~50質量%である緑茶抽出物を水溶液とし、分画分子量3000未満の濾過膜に通過させる、精製緑茶抽出物の製造方法。【選択図】なし
