Abstract
The effect of microwave heating versus conventional heating on the migration of dioctyl adipate (DOA) and acetyltributyl citrate (ATBC) plasticizers from plasticized poly(vinyl chloride) (PVC) and poly(vinylidene chloride/vinyl chloride) (P[VDC/VC]) films into pizza and frankfurter-type sausages has been studied. Microwave heating was carried out with and without a susceptor. The plasticizer migrating into the food was determined using an indirect gas chromatographic method after saponification of the ester-type plasticizer (DOA or ATBC) and subsequent collection of the alcoholic component of the ester, namely 2-ethyl-1-hexanol and 1-butanol, respectively. The extent of migration of both plasticizers into pizza and sausage followed the sequence: heating in conventional oven > microwave heating with a susceptor > microwave heating without a susceptor. The amounts of DOA that migrated into pizza and sausage were 105.12 mg/kg and 85.01 mg/kg during conventional heating, 75.52 mg/kg and 47.69 mg/kg during microwave heating with a susceptor and 51.42 mg/kg and 37.98 mg/kg during microwave heating without a susceptor, respectively. The amounts of ATBC that migrated into pizza and sausage were 31.18 mg/kg and 25.37 mg/kg during conventional heating, 7.73 mg/kg and 7.02 mg/kg during microwave heating with a susceptor and 6.25 mg/kg and 5.17 mg/kg during microwave heating without a susceptor.
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