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Polyethylene terephthalate (PET) has in the last several years become the  main packaging material for many food products, particularly carbonated  beverages and bottled water, as well as for products of chemical industry  (packaging of various hygiene maintenance agents, pesticides, solvents,  etc.). The strength and permeability properties of PET are very good for  packaging of beverages, its resistance to chemicals is high and it has a high  degree of transparency. Acetaldehyde and formaldehyde are formed during the  thermoforming of PET containers. After cooling, acetaldehyde and formaldehyde  remain trapped in the walls of a PET bottle and may migrate into the water  after filling and storage. Since there are no migration tests in Serbia  prescribed for the determination of acetaldehyde and formaldehyde, the  purpose of the paper is to test the quantitative contents of carbonyl  compounds (acetaldehyde and formaldehyde) in PET containers of different  volumes, made by various manufacturers of bottled mineral carbonated and  noncarbonated water, and exposed to different temperatures. In this study,  the migration of acetaldehyde and formaldehyde from PET bottles into mineral  carbonated and noncarbonated water was determined by high performance liquid  chromatography. Taking into consideration that formaldehyde and acetaldehyde  have no UV active or fluorescent group, the chromatography shall be preceded  by derivatization in a closed system (due to a low boiling point of  acetaldehyde and formaldehyde), which shall transform carbonyl compounds into  UV active compounds

Determination of carbonyl compounds (acetaldehyde and formaldehyde) in polyethylene terephthalate containers designated for water conservation