73D-15 |
The suitability of semi-rigid amorphous copolyesters for prepackaged irradiated foods: Migration study |
V. KOMOLPRASERT1, P. Truong2, T. H. Begley3, and T. P. McNeal3. (1) National Center for Food Safety & Technology, U.S. Food & Drug Administration, Division of Food Processing & Packaging, 6502 S. Archer Rd., Summit-Argo, IL 60501, (2) National Center for Food Safety & Technology, Illinois Institute of Technology, 6502 S. Archer Rd., Summit-Argo, IL 60501, (3) Division of Product Manufacture & Use, U.S. Food & Drug Administration, 200 C St. S.W., Washington, DC 20204 The migration of non-volatile compounds from irradiated semi-rigid copolyesters into food simulating solvents was studied to determine the suitability of the materials for pre-packaged irradiated foods. To determine the effects of gamma and e-beam irradiation on the migration of non-volatile compounds from the copolyesters into food simulating solvents. Two different semi-rigid amorphous copolyester (PET) materials were irradiated alone at 5, 25, and 50 kGy at ambient temperature with a Co60 radiator or an electron beam accelerator. These materials were subjected to migration experiments using 100% n-heptane and 10% ethanol food simulating solvents maintained at 40oC for up to 10 days. The residual nonvolatiles in the materials and those migrating into the food simulating solvents were determined by HPLC with UV and/or PDA detection. No new nonvolatile chemicals generated by irradiation were detected. A 5 kGy dose had no effect on either PET, but at 25 and 50 kGy doses of either gamma or e-beam irradiation, a slight increase in the levels of two low molecular weight oligomers was observed in both PETs. However, these increased levels did not significantly affect migration. Based on the 40oC migration data, an estimated maximum dietary exposure for each migrant was 0.10 mg/kg. Since irradiation at any of the doses had little effect on the migration of nonvolatiles from either PET, estimated dietary exposures at other storage conditions were determined using non-irradiated test specimens. Those data show the estimated maximum dietary exposure was 0.05 and 0.41 mg/kg for the migration data obtained at 20oC for up to 10 days and at 66oC for 2 h followed by 40oC for 238 h, respectively. Gamma and e-beam irradiation at 5-50 kGy did not significant affect migration of nonvolatiles in the tested PETs. Therefore, these PETs may be suitable for prepackaged irradiated foods.
Session 73D, Food Packaging
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