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| Migration Test and Risk Assessment Based on Dietary Exposure of PBT/PET Cyclic Oligomers in Polymer-laminated Metal Cans |
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| DOI： |
| KeyWord:polyethylene terephthalate（PET） polybutylene terephthalate（PBT） cyclic oligomers polymer-laminated metal cans migration test threshold of toxicological concern（TTC） risk assessment |
| Author | Institution |
| LI Qian-yun，WU Gang，WANG Ya，WANG Xiao-long，PAN Feng，ZHANG Hong，XING Hang，LI Jian-wen，ZHU Lei |
1. China National Center for Food Safety Risk Assessment，Beijing ，China; 2. China National Research Institute of Food and Fermentation Industries，Beijing ，China |
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| Abstract: |
| The cyclic oligomers may migrate from polyethylene terephthalate（PET） and polybutylene terephthalate（PBT） coating of metal cans to foods，which may do harm to the human health．Hence，a method was developed for the detection of migration content of PBT/PET cyclic oligomers in coating of metal cans by ultra-high performance liquid chromatography－quadrupole time-of-flight mass spectrometry（UPLC－QTOF MS）．According to the database of food consumption，the surface to volume（S/V） data of food contact materials and the migration tests of PET and PBT cyclic oligomers，the total intake of PET and PBT cyclic oligomers in chinese people exposing to coating of metal cans（fruit cans，drinks cans and beer cans） was estimated，and its risk was assessed by threshold of toxicological concern．Six kinds of PET and PBT cyclic oligomers belonged to the substances of Cramer Ⅲ．The maximum dietary exposure contents of PET and PBT cyclic oligomers were both 1.234 μg/kg·BW/d，which were lower than 1.5 μg/kg·BW/d，the threshold of substances of Cramer Ⅲ．As a result，the intake health risk of PET and PBT cyclic oligomers exposing on coating of metal cans（fruit cans，drinks cans and beer cans） was low，which required no undue attention. |
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