Determination of Octanol−Air Partition Coefficients (KOA) of Fluorotelomer Acrylates, Perfluoroalkyl Sulfonamids, and Perfluoroalkylsulfonamido Ethanols

Octanol−air partition coefficients ( K OA ) for three fluorotelomer acrylates (6:2 FTA, 8:2 FTA, 10:2 FTA), two perfluoroalkyl sulfonamides ( n -methyl perfluorooctane sulfonamide (MeFOSA), n -ethyl perfluorooctane sulfonamide (EtFOSA)), and two perfluoroalkyl sulfonamido ethanols ( n -methyl perfluorooctane sulfonamido ethanol (MeFOSE), n -ethyl perfluorooctane sulfonamido ethanol (EtFOSE)) were determined over a temperature range from (278 to 313) K using a modified generator column method. The K OA values were calculated as the ratio of the target analyte concentrations in octanol to the target analyte concentrations in octanol saturated air. Calibrated log K OA values at 298 K ranged from 4.5 (6:2 FTA) to 6.7 (EtFOSE). Log K OA values decreased with increasing temperature and increased in the order of 6:2 FTA, 8:2 FTA, 10:2 FTA, MeFOSA, MeFOSE, EtFOSA, EtFOSE. The combined uncertainty of the method applied ranged from 5.1 % (6:2 FTA) to 17.6 % (MeFOSA). The relative extended uncertainty ( P = 95 %) ranged from 11.6 % (6:2 FTA) to 39.8 % (MeFOSA), respectively.