PROBLEM TO BE SOLVED: To provide a manufacturing method of a refined green tea extract which improves the bitter taste and harsh taste derived from unpolymerized catechin.SOLUTION: The manufacturing method of a refined green tea extract includes performing the following steps (A) and (B) and then performing the following steps (C) and (D): (A) Step of mixing a green tea extract with a solvent mixture of organic solvent and water with an organic solvent concentration of 30 to 60 mass% and removing produced insoluble matters (B) Step of adjusting the organic solvent concentration of the produced solution to more than 60 mass% and 80 mass% or less (C) Step of performing a contact treatment with acid clay and (D) Step of performing a contact treatment with active carbon.COPYRIGHT: (C)2014,JPO&INPIT【課題】非重合体カテキン類由来の苦味やエグ味が改善された精製緑茶抽出物の製造方法を提供すること。【解決手段】次の(A)及び(B)の工程:(A)緑茶抽出物を、有機溶媒と水との混合溶媒であって、有機溶媒濃度が30~60質量%の混合溶媒に混合し、生じた不溶物を除去する工程、(B)得られた溶液の有機溶媒濃度を60質量%超80質量%以下に調整する工程、を行った後、次の(C)及び(D)の工程:(C)酸性白土と接触処理させる工程、(D)活性炭と接触処理させる工程を行う精製緑茶抽出物の製造方法。【選択図】なし
