Thijs, MikeLaletas, ErnestQuinn, Caitlin M.Raguraman, Subbu V.Carr, BryanBierganns, Patric2024-06-052024-06-052024-05-28Thijs, Mike, Ernest Laletas, Caitlin M. Quinn, Subbu V. Raguraman, Bryan Carr, and Patric Bierganns. “Total and Class-Specific Determination of Fluorinated Compounds in Consumer and Food Packaging Samples Using Fluorine-19 Solid-State Nuclear Magnetic Resonance Spectroscopy.” Analytical Chemistry 96, no. 21 (May 28, 2024): 8282–90. https://doi.org/10.1021/acs.analchem.3c04404.1520-6882https://udspace.udel.edu/handle/19716/34452This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry, copyright © 2024 Solenis 2024. Published by American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.analchem.3c04404. This article will be embargoed until 05/28/2025.Hamburger wrapping paper, coated with water-based barrier coatings, used in the food packaging industry was studied by using the total organic fluorine (TOF) method based on combustion ion chromatography and fluorine-19 solid-state nuclear magnetic resonance (19F ss-NMR) spectroscopy. Although the TOF method is a fast and affordable method used to screen for per- and polyfluoroalkyl substances (PFAS), the amount of fluorine it measures is heavily dependent on the extraction step and, therefore could lead to inaccurate results. Fluorine-19 ss-NMR spectroscopy can differentiate between organic and inorganic fluorinated sources, eliminating the need for sample clean up. To illustrate this, the 19F ss-NMR spectra of clean coated paper samples that contained naturally occurring F- ions from the talc raw material and spiked samples containing perfluorooctanoic acid were compared. A range of experimental conditions was explored to improve sensitivity for low PFAS concentrations (in the order of 10–20 mg/kg). Despite the disadvantages of ss-NMR spectroscopy, such as the low limit of detection and resolution, the results demonstrate it can be a viable tool to directly detect PFAS moieties in consumer and food packaging. Therefore, 19F solid-state NMR spectroscopy challenges and complements current methods, which only provide indirect evidence of the presence of PFAS.en-USArticle