Migration of dioctyladipate plasticizer from food-grade PVC film into chicken meat products: effect of gamma-radiation.
Food-grade PVC film containing 28.3% dioctyladipate (DOA) plasticizer was used to wrap chicken meat samples, with and without skin, contained in a polystyrene tray. Samples were then irradiated with gamma-radiation [60Co] at doses equal to 4 kGy and 9 kGy corresponding to "cold pasteurization". Irraddiation was carried out at 8-10 degrees C and samples were subsequently stored at 4-5 degrees C. Contaminated chicken meat samples were analysed for DOA at intervals between 7 h and 240 h of contact, using an indirect GC method. Identical non-irradiated (control) samples were also analysed for their DOA content. Results showed no statistically significant differences in migrated amounts of DOA between irradiated and non-irradiated samples. Neither were differences observed between samples irradiated at 4 kGy and 9 kGy. This was supported by identical IR spectra recorded for irradiated and non-irradiated samples and leads to the conclusion that, at such intermediate radiation doses ( < or = kGy), the migration characteristics of PVC film are not affected. DOA migration was found to be time dependent, approaching equilibrium after approximately 170 h for the chicken flesh plus skin samples and 120 h for the chicken flesh samples. The amount of DOA migrated into chicken flesh plus skin samples was significantly greater (3.2-22.3 mg/dm2) than that for chicken flesh samples (0.9-8.9 mg/dm2). After 240 h of sample/film contact under refrigeration, loss of DOA was approximately 35.6% for chicken flesh plus skin samples and 14.3% for chicken flesh samples. Sample spoilage, as demonstrated by off-odour development, occurred after approximately 120 h of refrigerated storage. Diffusion coefficients for DOA were calculated and were found to be lower for chicken flesh (1 x 10(-13) than for flesh plus skin (4.4 x 10(-13)) samples.
Goulas
A E
AE
Department of Chemistry, University of Ioannina, Greece.
Kontominas
M G
MG
D000272:Adipates / Q000032:analysis*; D000818:Animals; D002645:Chickens; D005514:Food Irradiation; D005720:Gamma Rays; D010968:Plasticizers; D011143:Polyvinyl Chloride; D011202:Poultry Products / Q000032:analysis / Q000528:radiation effects / Q000592:standards*; D013055:Spectrophotometry, Infrared; D013997:Time Factors
D000272:Adipates; D010968:Plasticizers; C013966:dioctyl adipate; D011143:Polyvinyl Chloride