ABSTRACT
Three groups of PE films added with antioxidants BHT, Irganox 1076, and Irgafos 168 were separately and purposely made for specific migration testing under microwave heating conditions with different microwave power and time. The initial concentration of contaminant simulant in the plastic films was tested both with Soxhlet extraction method and migration cell extraction method and determined by RP-HPLC method. Six types of edible oils were used as fatty food stimulants, whose temperature-time profiles were made by using MWS OSR-8 type fiber optic thermometer system (made by FISO Technology, Canada). There is a linear relationship between temperature and time under testing conditions. Migration of BHT, Irganox 1076, and Irgafos 168 separately from PE films into six types of edible oils was tested under microwave heating conditions (microwave power from 100 to 900W), whose diffusivity were calculated. Results show that the relationship between migration and microwave energy (product of microwave power and time) is also almost linear.
