Determination of Octanol-Air Partition Coefficients (K_(oa)) of Fluorotelomer Acrylates, Perfluoroalkyl Sulfonamide, and Perfluoroalkylsulfonamido Ethanols

摘要

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.