Recycling Migration model

Vice versa, migration models allow a back calculation to maximum permissible contaminant concentrations in recycled PET bottle starting with the FDA prescribed migration upper limit of 0.01 ppm (10 ppb) in the foodstuff. Table 10-10 shows the calculated situation for three of the model contaminants used, based on the above mentioned diffusion model. 

FIG U RE 7.10 Proposed model of hydrate formation by upward migration and recycling of gas. (Reproduced from Pauli, C.K., Ussier, W., Borowski, W.S., inProc. First International Conference onNatural Gas Hydrates, 715,392 (1994). With permission from the New York Academy of Sciences.)... 

Challenge test A test of the effectiveness of a super-clean recycling process to remove chemical contamination from materials or articles. The test involves introduction of exaggerated levels of surrogates and includes as an end parameter the migration evaluation of these surrogates from a model food contact article. 

Franz R, Mauer A, Welle F (2004) European survey on post-consumer poly(ethylene terephthalate) (PET) materials to determine contamination levels and maximum consumer exposure from food packages made from recycled PET. Food Addit Contam 21(3) 265-286 Franz R, Welle F (2008) Migration measurement and modelling from poly(ethylene terephthalate) (PET) into soft drinks and fruit juices in comparison with food simulants. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 25(8) 1033-1046 Guazzotti V, Marti A, Piergiovanni L et al (2014) Bio-based coatings as potential barriers to chemical contaminants from recycled paper and board for food packaging. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. doi 10.1080/19440049.19442013. 19869360... 

---