Analysis Of Perfluorinated Compounds In Food Contact Material, Textile And Leather

Perfluorinated compounds, as a group of industrial chemicals, which have three features, widespread existence in environment, hard degradation and biological accumulation, have affected human health and environmental safty. PFCs in food-contact materials may contaminate the food they contact. European Union (EU) limited the use of perfluorooctane sulfonate (PFOS) in textile and leather in European markets and there were no potential substitute goods. Therefore, it's important to establish methods for detecting PFCs in food-contact materials, textile and leather.The method was established to determine ten PFCs in textile goods by HPLC-MS/MS. We compared extraction efficiency of three methods, including soxhlet method, ion pairing method and ultrasonic method, and optimized the extraction solvents and time. Finally the ultrasonic extraction method with methanol as the solvent and 40 min as the extraction time was selected. Matrical standard curve was used to minimize matrix effect. The limit of detection and recovery range of the method were 0.5μg/m2 and 84.6%-111.8%, respectively. For real samples detection, some coated textiles were detected to contain PFOS more than 1μg/m2.The detection method for PFCs in leather was also studied. ASE was used to extract PFCs in leather and three experimental conditions (temperature, solvent and recycle times) were optimized. SPE purification and matrical standard curve were used to minimize matrix effect. The limit of detection and recovery range of the method were 5μg/kg and 80.3%～115.9%, respectively.36 of the total 52 leather samples were detected to contain PFCs, and the highest concentration of PFCs was 284.47μg/kg. PFOA and PFOS were the main PFCs in leather.PFCs in food-contact materials were extracted by ultrasonic and detected by HPLC-MS/MS. The limit of detection and recovery range of the method were 0.5μg/m2 and 90.6%～112.8%, respectively. Among the 100 food-contact samples, the highest concentration of PFCs was 317.24μg/m2.17 samples were detected to contain PFOA, while 16 contain PFOS. Half of the 12 fast food packaging samples were detected to contain PFCs ranged from 6.80～142.68μg/m2. All of the 4 popcorn packaging samples were measured to have PFCs ranged from 46.24～196.64μg/m2. One way analysis of variance (ANOVA) was used to analyze the relationship among PFCs and there were statistically significant positive correlations between two PFCs among PFHxA, PFOA, PFNA, PFDA, PFUnDA and PFDoDA (R2>0.735, P<0.05).