Determining the Temperature-Dependent Air-Water Partitioning of Ether- and Thioether-Alcohol Perfluoroalkyl and Polyfluoroalkyl Substances Using a Modified Static Headspace Method.

ABSTRACT: The temperature-dependent air-water partitioning behavior of a novel class of perfluoroalkyl and polyfluoroalkyl substances (PFAS) was assessed both experimentally and via in silico prediction. These PFAS contain ether or thioether linkages and are transformation products of an alternative PFAS surfactant. A modified version of the static headspace method with variable headspace/solution ratios was used to determine the dimensionless air/water partition coefficients (K_aw) over a wide range of temperatures (25-80 °C). The samples were analyzed through the aqueous phase instead of the headspace because of their relatively low volatility. The obtained log K_aw values of the tested chemicals ranged from -2.6 to -1.0 at 25 °C. No differences in K

SUBMITTER: Licul-Kucera V 

PROVIDER: S-EPMC12355946 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature