Simultaneous qualitative and quantitative analysis of PFSAs by Orbitrap was tested.
Quantification of PFOS isomers based on full-scan MS1 chromatogram.
Competent linear dynamic range and sensitivity were found in the HRMS method.
Accurate mass measurement had advantage on elimination of environmental interferent.
High proportions of the emerging 6:2Cl-PFAES were found in riverine water samples.