Wine is the collectiveness of alcohol (ethanol) beverage, ethanol is one of the main components of wine, one of the important indicators of measuring the quality of the wine.Ethanol can be used to make acetic acid, beverage, flavor, dye, fuel, etc., medical common volume fraction of 70% to 75% is a disinfectant.Ethanol has a wide range of uses in the chemical industry, health care, food industry, and agricultural production.Ethanol produces hydrogen peroxide in catalytic decrease in ethanol oxidase.Peroxide enzymes catalyze penetrate oxidation 4-aminopheniculin coupling phenol, produced a colored compound, and has a characteristic absorption peak at 505 nm.Determination of 505 nM absorption peaks can react to ethanol content

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