Method for measuring content of unsaturated acid in liquid-phase mixture

The invention relates to a method for measuring content of unsaturated acid in liquid-phase mixture. Liquid-phase mixture is mainly prepared from acraldehyde, acrylic acid and acetic acid; dimethyl sebacate is taken as an internal standard method; the content of the unsaturated acid in the liquid to be measured is analyzed by using gas chromatographic analysis. The measuring method is low in cost, is easy and convenient to operate, is easy and rapid, is accurate in measuring result, and is high in repeatability. 本发明涉及种测定液相混合物中不饱和酸的方法，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不饱和酸的含量。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。