Method for measuring content of acetic acid in liquid product of propylene oxidation reaction

The invention relates to a method for measuring content of acetic acid in a liquid product of a propylene oxidation reaction. A liquid mixture is mainly prepared from acrolein, acrylic acid and acetic acid; the content of the acetic acid in liquid to be measured is analyzed with gas chromatography by taking dimethyl decanedioate as an internal standard substance, and quantifying according to an internal standard method. The measuring method provided by the invention has the advantages of low cost, easiness and convenience in operation, easy and simple method, accurate measuring result and high repeatability.