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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: J Environ Sci (China). 2021 Aug 22;115:350–362. doi: 10.1016/j.jes.2021.08.004

Figure 4. Sample LC-IMS-MS chromatograms and spectra of two PFAS features with drift time spectra and KMD plot for PFAS features identified in this study.

Figure 4.

(a) Chromatogram and drift spectra for 6:2 FTAB. Top is the LC chromatogram for the precursor ion. Bottom, IMS-MS spectra indicating the precursor ion and its isotopic patterns with the shaded area indicating drift time tolerance for confident identification. Colors indicate feature abundance. (b) Chromatogram and drift time spectra for 6:2 FTS. (c) KMD CF2 scale plot versus m/z for all PFAS features identified in surface water samples from HSC/GB. Open symbols indicate features that belong to a homologous series. Shaded symbols indicate features that do not belong to a homologous series.