Method for analyzing content of unsaturated acids in liquid phase mixture by gas chromatography

The invention relates to a method for analyzing the content of unsaturated acids in a liquid phase mixture by gas chromatography. The unsaturated acids in the liquid phase mixture include acrylic acid and acetic acid. The method comprises the following determination steps: firstly, determining the total acid molar concentration in a to-be-tested liquid by an acid-base titration method; then determining the content of acrylic acid and acetic acid by the gas chromatography; and finally measuring the molar concentration of acrylic acid. The determination method has the advantages of low cost, simple and convenient operation, low requirements on a test environment, no need of large-scale analysis equipment, simple and rapid method, accurate determination results and good repeatability.