Method for detecting acetic anhydride, diketene and dehydroacetic acid in diketene production

The invention provides a method for detecting acetic anhydride, diketene and dehydroacetic acid in diketene production, and relates to the technical field of diketene component detection.The method comprises the steps that ethyl acetate serves as an internal standard substance, a standard solution containing acetic anhydride, diketene and dehydroacetic acid is prepared, a gas chromatographic method is used for obtaining a standard solution chromatogram, and the standard solution chromatogram is used for detecting the content of diketene; the method comprises the following steps: preparing a sample to be detected, drawing an acetic anhydride standard curve, a diketene standard curve and a dehydroacetic acid standard curve, then preparing a solution to be detected containing the sample to be detected and an internal standard substance ethyl acetate, and determining acetic anhydride, diketene and dehydroacetic acid in the solution to be detected by using gas chromatography to obtain a chromatogram of the solutio