PROBLEM TO BE SOLVED: To provide a method of measuring peracetic acid concentration in a peracetic acid and hydrogen peroxide-containing sterilizing medium in a beverage bottling plant.SOLUTION: A method disclosed herein comprises: a step 36 of treating a sterilizing medium in a beverage bottling plant 10 by feeding a catalase enzyme to convert hydrogen peroxide contained in the sterilizing medium into oxygen and water； and a step 38 of measuring peracetic acid concentration in the treated sterilizing medium using an optical measurement method.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】飲料充填設備において過酢酸および過酸化水素含有殺菌剤中の過酢酸濃度を測定する方法を提供する。【解決手段】飲料充填設備１０において、殺菌剤中に含まれる過酸化水素を酸素と水に変換するカタラーゼ酵素を供給することにより殺菌剤を処理する工程３６、および光学測定方法を用いて処理済の殺菌剤中の過酢酸濃度を測定する工程３８を含む。【選択図】図１
