Hydrolysis of FTOH precursors, a simple method to account for some of the unknown PFAS

There is a growing concern over suspected presense of unknown perfluoroaliphatic substances (PFAS) in consumer goods and the environment. Such substances, possibly with high molecular weight, might be precursors hazardous or controlled known PFAS. Recent studies confirmed that total organic fluorine (TOF) content often can not explained by measured target One classes such unknowns are polymers fluorotelomer alcohol (FTOH) residues side chain. In this report we suggest hydrolysis precursors, as complementary method to account for It was shown here allows preserve structural information on perlfuorinated parts which an advantage purpose accurate risk assessment source identification. A convenient procedure 4% sodium hydroxide water-methanol mixture (1:9) at 60 °C 16 h convert model - FTOH acrylate, methacrylate isobutyrate esters well phenylcarbamate free FTOHs. Analysis extracts textile samples preliminary without it showed up 1300-fold higher level “hidden” • Hydrolysis simple PFAS NaOH, MeOH–H2O (9:1), °C, 16h 500–1300 times after