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. 本发明涉及种测定丙烯氧化反应液相产物中乙酸含量的方法，液相混合物中主要含有丙烯醛、丙烯酸、乙酸，以癸二酸二甲酯为内标物，内标法定量，气相色谱分析待测液中乙酸的含量。本发明的测定方法成本低，操作简便，方法简单快速，测定结果准确，重复性好。