Migration of selected contaminants (DEHA, DEHP and ethylene glycol) from PET bottles into Iranian yogurt drink during storage time

Chemical Product Design and Engineering (CPD&E)

Chemical Product Design & Engineering - Poster (CPD&E - P)

Mr Mehdi Farhoudi
Biosystem Engineering Faculty of Tehran university
Dept. of food science and technology
Department of Food Science, Engineering and Technology
Faculty of Biosystem Engineering
University of Tehran
Karaj - Iran - P.O. BOX 31587-78659.
Islamic Republic of Iran

Keywords: migration, DEHA, DEHP, Ethylene glycol, crystallinity, Polyethyene terephthalate

Polyethylene terephthalate (PET) is one of packaging materials that is widely used for packaging of beverages and edible oils. It’s impermeability against gasses and vapors makes it qualified for packaging of carbonated beverages.
A control campaign on PET bottles according to current legislation on food contact materials has been performed. In this study the migration of Di(2-ethylhexyl) adipate (DEHA), Di(2-ethylhexyl) Phthalate (DEHP) and Ethylene Glycol from PET bottles into the Iranian yogurt drink was investigated. Intrinsic viscosity and crystallinity of PET bottles during storage time was tested to study the effect of these functions on polymer properties changes and subsequently migration amount. According to European Commission regulations Acetic acid (3% w/v) was chosen as stimulant. The acetic acid samples were stored at 4°C, 25°C and 45°C for 4 month and analyzed periodically by gas chromatography. The maximum amount of migration was seen after 65 days at 45°C, 2.4, 2.5.6 and 2.9 mg/l for DEHA, DEHP and ethylene glycol respectively. It was concluded that the contaminants concentrations in simulant solutions are increasing based storage time and temperature increase but they don’t exceed of their specific migration limit.