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A) Extracted ion chromatograms of TCBA-BA-PFOS and its decarboxylated version showing coelution B) The structure of TCBA-BA-PFOS C) MS/MS of TCBA-BA-PFOS with proposed structures or formulas for the fragments D) MS1 spectrum of TCBA-BA-PFOS (873.8335) and its decarboxylated fragment (829.8444)
