Considerations for reuse of poly(ethylene terephthalate) bottles in food packaging: migration study.
Komolprasert V. | Lawson A.R.
Experiments were performed to evaluate the significance of potential contamination of postconsumer poly(ethylene terephthalate) (PETE) on the reuse of such material as food packaging. The protocol in the FDA document Points to Consider for the Use of Recycled Plastics in Food Packaging: Chemistry Considerations (FDA, 1992) that are routinely employed to evaluate recycling processes for removal of potential contaminants were used. Two-liter PETE bottles were contaminated separately with benzene, butyric acid, malathion, and lindane at 40 degrees C for 2 weeks, rinsed, dried, and cut into small chips. The contaminated chips were washed at 73 degrees C, dried with an IR lamp, and extracted using 8% aqueous ethanol solution at 49 +/- 1 degrees C for 30 days. After 30 days, approximately 60% of the benzene, 30% of the butyric acid, and 30% of the lindane had migrated from the contaminated chips into the 8% ethanol solution, but no measurable concentration of malathion was observed.
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