EN
This model experiment was aimed towards determination of the effect of repeated microwaving on migration of volatile substances to food simulating model solutions from packages commonly used in food industry. For this purpose 5 most common plastic packages were selected: white round shaped polypropylene container for ready to eat courses, its polystyrene cover, yellow polypropylene cup of 175 cm3 capacity, white polystyrene cup of 135 cm3 capacity and polystyrene/polyethylene foil; 3% acetic acid, 15% ethanol and rectified olive oil were taken as food simulating solvents. Prior to microwaving, the samples were stored for 10 days in 5°C. Using the GC/MS combined with static head space technique, 26 substances migrating into food simulants were identified after storage and prior to microwave heating. Cumulative exposure time to microwaving ranged from 2 till 30 min.