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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 6. Time trends in the abundance of different PFAS subclasses detected by LC-IMS-MS across all sampling locations and timepoints (April-August 2019).

Figure 6.

Line graphs show normalized feature abundances of each subclass (n=8) of PFAS species detected by LC-IMS-MS. The total abundance within each subclass of PFAS features from different time points were normalized to the total abundance in April. The number of PFAS features within each subclass is indicated by the value next to the subclass name. The number in brackets beneath each sampling location represents distance from ITC fire location. Positive values denote down-stream and negative values denote up-stream. Red box indicates the sampling site (SCW2) that was closest to the ITC fire location. Fluorotelomer sulfonic acids (FTSA), perfluoroalkane sulfonamide (FASA), perfluorophosphonic acids (PFPA); additional abbreaviations for PFAS classess can be found in text.