title: Evaluation of e-beam, gamma- and X-ray treatment on the chemistry and safety of polymers used with pre-packaged irradiated foods: a review.
abstract: Polymers used to package food intended for irradiation must currently receive separate US FDA approvals for e-beam, gamma and X-radiation. The three forms of irradiation have virtually indistinguishable effects on polymers held in vacuum. However, in air, irradiation damage is favoured by slow dose rates, such as that characteristic of gamma irradiation. Irrespective of irradiation type, theory and existing polymer irradiation literature both suggest that radiolytic products in food contact polymers should not present a health hazard due to migration into the foods they contain. Equations are presented which calculate the FDA allowable content of radiolytic products to achieve 'threshold of regulation' clearance and conversion of radiolytic yield values (G-values) into ppb concentration in the treated polymer in conformance with FDA practice. An approach to quantifying the functional barrier of a polymer is discussed.
authors.affiliation: National Center for Food Safety and Technology, Illinois Institute of Technology, Summit-Argo 60501-1933, USA. sadler@iit.edu
authors.forename: G
authors.initials: G
authors.lastname: Sadler
authors.forename: W
authors.initials: W
authors.lastname: Chappas
authors.forename: D E
authors.initials: DE
authors.lastname: Pierce
mesh_terms: D004583:Electrons; D005506:Food Contamination; D005514:Food Irradiation; D018857:Food Packaging; D005720:Gamma Rays; D006801:Humans; D011108:Polymers / Q000528:radiation effects*; D014965:X-Rays
chemical_list: D011108:Polymers