Schwartz-Narbonne Heather, Xia Chunjie, Shalin Anna, Whitehead Heather D, Yang Diwen, Peaslee Graham F, Wang Zhanyun, Wu Yan, Peng Hui, Blum Arlene, Venier Marta, Diamond Miriam L
Department of Earth Sciences, University of Toronto, Toronto M5S 3B1, ON, Canada.
O'Neill School of Public and Environmental Affairs, Indiana University, Bloomington 47405, Indiana, United States.
Environ Sci Technol Lett. 2023 Mar 28;10(4):343-349. doi: 10.1021/acs.estlett.2c00926. eCollection 2023 Apr 11.
A suite of analytical techniques was used to obtain a comprehensive picture of per- and polyfluoroalkyl substances (PFAS) in selected Canadian food packaging used for fast foods ( = 42). Particle-induced gamma ray emission spectroscopy revealed that 55% of the samples contained <3580, 19% contained 3580-10 800, and 26% > 10 800 μg F/m. The highest total F (1 010 000-1 300 000 μg F/m) was measured in molded "compostable" bowls. Targeted analysis of 8 samples with high total F revealed 4-15 individual PFAS in each sample, with 6:2 fluorotelomer methacrylate (FTMAc) and 6:2 fluorotelomer alcohol (FTOH) typically dominating. Up to 34% of the total fluorine was released from samples after hydrolysis, indicating the presence of unknown precursors. Nontargeted analysis detected 22 PFAS from 6 different groups, including degradation products of FTOH. Results indicate the use of side-chain fluorinated polymers and suggest that these products can release short-chain compounds that ultimately can be transformed to compounds of toxicological concern. Analysis after 2 years of storage showed overall decreases in PFAS consistent with the loss of volatile compounds such as 6:2 FTMAc and FTOH. The use of PFAS in food packaging such as "compostable" bowls represents a regrettable substitution of single-use plastic food packaging.
使用了一套分析技术来全面了解加拿大用于快餐的特定食品包装中的全氟和多氟烷基物质（PFAS）（n = 42）。粒子诱导伽马射线发射光谱显示，55%的样品含氟量<3580μg F/m，19%含氟量为3580 - 10800μg F/m，26%含氟量>10800μg F/m。在模制“可堆肥”碗中测得的总氟含量最高（1010000 - 1300000μg F/m）。对8个总氟含量高的样品进行靶向分析发现，每个样品中有4 - 15种单独的PFAS，其中6:2氟调聚物甲基丙烯酸酯（FTMAc）和6:2氟调聚物醇（FTOH）通常占主导地位。水解后，高达34%的总氟从样品中释放出来，表明存在未知前体。非靶向分析检测到来自6个不同组的22种PFAS，包括FTOH的降解产物。结果表明使用了侧链氟化聚合物，并表明这些产品可释放短链化合物，最终可转化为具有毒理学意义的化合物。储存2年后的分析表明，PFAS总体减少，这与6:2 FTMAc和FTOH等挥发性化合物的损失一致。在诸如“可堆肥”碗等食品包装中使用PFAS是一次性塑料食品包装令人遗憾的替代品。
