Abstract
Gas chromatographic determination of residual acetaldehyde in PET bottles was developed. The presence of residual acetaldehyde in PET bottles may forbid these bottles to be used for food packing materials since relatively low amounts may influence the smell and the taste. A known amount of polymer sample was heated at 150°C under nitrogen atmosphere during 10 min in a glass tube fixed in the pyrolyzer. The free acetaldehyde was directly carried to a gas chromatograph connected with the pyrolyzer and was analyzed quantitatively with calibration standard of acetaldehyde. Thus quantitative analysis of acetaldehyde in PET can be done conveniently by this method with a small quantity of sample and will be useful for food chemistry and food sanitation chemistry.
