Migration of phthalate and adipate components i from polyethylene terephthalate [PET] bottles to edible oils during storage

ABSTRACT

The migration of plasticizers, i. e., Di-methyl phthalate [DMP] ,Di-[2-ethylhexyl] phthalate [DEHP], Di-n-butyl phthalate [DBF] and Di -ethylhexyl adipate[DEHA] from polyethylene terephthalate bottles [PET] into edible oils [mixture of sunflower oil with soybean oilll]was studied under temperature of 4, 20 and40+/- 1°C for 360days. The plasticizers were determined by gas chromatography [GC].Statistically significant differences for migration of plasticizers were observed between treatments. Migration of plasticizers depended on temperature and storage time. The results showed that, migration increased with increasing temperature and storage time [contact time].High migration was observed at 40 °C and low migration was found at4 °C. The highest migration level was noticed with DEHA and DEHP compound. The concentration of DEHA and DEHP reached to 1003.42 and 512.41g/ml after 150 and 225 days of storage at 40 °C, respectively. These values were higher than the upper limit for global migration from plastic packaging materials into food and food stimulants set by the European Union [EU] [60mg/kg or 10mg/dm[2]], it could be concluded that, the best storage conditions for edible oils might be 4°C for 6 months or 20 - 40°C for 4 months?