Quantification of overall migration levels from poly (vinyl chloride) films: effects of gamma and electron beam radiation
This study investigated the overall migration from Poly (vinyl chloride) (PVC) polymer films into food simulants, after gamma irradiation (60Co) or electron beam radiation. PVC polymer films containing di-(2-ethylhexyl) adipate (DEHA) and epoxidized soybean oil were stored under controlled temperature (24 ± 1oC) and moisture (50 ± 5 %) for 2 days. These films were supported on a stainless-steel plates and specimens were subjected to ionizing radiation treatment with gamma radiation from a 60Co source (dose rate = 20 Gy/min) or electron beam radiation (dose rate = 120 Gy/min) at absorbed doses equal to 0, 10, 25 and 50 kGy. Overall packing migrants were evaluated on different food simulants (distilled water, 3 % w/v acetic acid and 10 % v/v ethanol) as a function of time (24, 48 and 72 hours). Results of overall migration levels showed that the treatment with radiation doses above 10 kGy promoted a significant increase of the overall packing migrants levels into all aqueous food simulants (p < 0.05). Overall migration levels were also enhanced with increasing exposure time to food simulants.
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