Nonpolymeric Per- and Polyfluoroalkyl Substances (PFAS) and Side-Chain Fluorinated Polymers in Canadian Building Products

作者：Min Liu, Chunjie Xia, Hui Peng, Elizaveta Zvereva, Darcy C. Burns, Justine Fontaine, Arlene Blum, Ariana Z. Spentzos, Zhanyun Wang, Graham F. Peaslee, Sébastien Sauvé, Marta Venier, Miriam L. Diamond · 发表于：Environmental Science & Technology · 年份：2025 · DOI：10.1021/acs.est.5c07012 · 被引用次数：8 · 研究领域：Per- and polyfluoroalkyl substances research、Atmospheric chemistry and aerosols、Air Quality and Health Impacts

High Resolution Image Download MS PowerPoint Slide To understand if exterior building products are a source of perfluoroalkyl and polyfluoroalkyl substances (PFAS) to the environment, we measured PFAS in 145 samples of paints, sealers, and textiles, mostly intended for exterior use. We first developed a combined one and two-dimensional diffusion-ordered spectroscopy (1D and 2D-DOSY) fluorine nuclear magnetic resonance ( 19 F NMR) method to characterize and quantify side-chain fluorinated polymers (SCFPs) and nonpolymeric PFAS. Results showed that 36% (22/61), 24% (13/54), and 70% (21/30) of tested paints, sealers, and textiles contained total organic fluorine (TOF) at 0.1–16.1, 0.4–2488, and 0.34–74.0 μmol/g, respectively. Paints mainly contained 6:2 fluorotelomer (FT) and aromatic-CF 3 nonpolymeric PFAS, while sealers also contained 6:2 FT SCFPs and perfluorobutane sulfonyl fluoride (PBSF)-based PFAS. Textiles contained 6:2 FT, 8:2 FT, and PBSF-based PFAS indicative of SCFPs. Advanced mass spectrometry methods revealed that paints and sealers with 6:2 FT nonpolymers mainly contained 6:2 fluorotelomer phosphate mono-, di-, and triesters (6:2 mono-, di-, and triPAPs) and 6:2 FT dipyrophosphate, while textiles primarily contained n:2 fluorotelomer alcohols (n:2 FTOH, n = 6, 8) or N -methyl perfluorobutane sulfonamide alcohol (MeFBSE). Based on the PFAS found in these products and the recommendation to reapply the coatings to protect exterior/interior surfaces and the replacemen...