Springer Online Journal Archives 1860-2000
Energy, Environment Protection, Nuclear Power Engineering
Conclusions 1. The investigation was designed to elucidate the mechanism of migration of Aroclor 1242 to packaged foods. It was conducted in sealed glass jars and the packaging materials used had been treated to contain higher levels of Aroclor 1242 than are commonly found in food packaging materials presently used in the food industry. The data indicate that migration is a vapor-phase phenomenon. Accordingly, interposing barrier materials between Aroclor bearing paperboard and food significantly reduces the migration to food. The degree of the reductions appears inversely correlated with the known gas permeabilities for the classes of barrier materials studied. Of these, PVDC-coated paper prevented Aroclor migration for the 90-day test period. Waxed glassine paper was found to be second most effective of the barriers included in this study. Polyethylene film was relatively ineffective at the longer storage intervals. 2. In the absence of an effective barrier, Aroclor 1242 was shown to migrate from paperboard to food in measurable amounts when food is packaged in paperboard containing a significant amount of Aroclor 1242. 3. Pick-up of Aroclor 1242 by packaged foods is predominately an adsorption phenomenon. The equilibrium adsorption of Aroclor 1242 on food is primarily dependent on the surface area of the food and only secondarily dependent on the fat content of the food. This suggests that adsorption is a surface condensation mechanism. 4. The effectiveness of other barrier materials commonly used in food packaging, e.g., foil laminates, copolymer films, paper laminates was not investigated. The results of this study would suggest that materials of low gas permeability would be effective barriers to PCB migration.
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