Migration of polyethylene terephthalate oligomers from packaging into food simulant liquids
1996
Dobias, J. | Voldrich, M. | Proks, M. (Vysoka Skola Chemickotechnologicka, Prague (Czech Republic). Ustav Konzervace Potravin a Technologie Masa)
Phthalic acid isomers migrating into water simulants were determined after their isolation and silylation by gas chromatography. PET oligomers in water food simulants were hydrolysed by alkali, the released isomers of phthalic acid were quantified by the same procedure as above. To determine the PET oligomers in olive oil the simulant containing PET oligomers was hydrolysed in methanolic KOH solution, the liberated phthalic acid isomers were methylated and analysed by gas chromatography. The migration of phthalic acid isomers of analysed PET samples into water food simulants ranged from 0.9 to 4.7 microg/dm2. The PET oligomers migration into water food simulants was in the range 0.10 to 0.81 mg/m2, in the case of olive oil it was from 1.15 to 3.46 mg/dm2.
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