Determination of methanol, ethyl acetate, ethyl lactate and n-propanol in alcohol by capillary gas chromatography

The ethyl acetate and the fusel oil are important taste material, the content of which has a direct influence on the taste of liquor. The sample was put into HP-INNOWAX of capillary column and analyzed with FID detector, they were quantified by external standard method. To establish a practical method for simultaneous determination of methanol, n-propanol, ethyl acetate and ethyl lactate in alcohol. Under the proposed conditions, the limit of detection were range 0.001～0.002 g/L, the sample recoveries within 99.5%～105.8%, the relative standard derivation within 0.15%～1.95%. The method is rapid, sensitive and suitable for determination of methanol, n-propanol, ethyl acetate and ethyl lactate in alcohol.