Method for measuring content of acetaldehyde in liquid-phase mixture

The invention relates to a method for measuring content of acetaldehyde in liquid-phase mixture. The liquid-phase mixture is mainly prepared from acraldehyde, acrylic acid and acetic acid; butanone is taken as an internal standard; the content of the acetaldehyde in liquid to be measured is analyzed quantitatively by using an internal standard method. 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.