name neutral tentative structure m/z pos m/z neg Detected? photolysis formula (pos/neg) Parathion 292.0403 pos (H)/- (H) (lock mass) P1 276.0632 pos (H)/- UV/H2O2 (Paraoxon) (H) < 0.25 ppm P2 C6H5NO3 138.0197 -/neg (H) direct and (H) < 0.1 ppm UV/H2O2 P3 169.0094 -/neg (H) direct and (O,O-diethyl (H) < 0.3 ppm UV/H2O2 thiophosphate) P4 C4H11O4P 153.0322 -/neg (H) direct and (O,O-diethyl (H) < 0.1 ppm UV/H2O2 phosphate) P5 247.0552 245.0407 -/- (O,O-diethyl (H) (H) phenyl thiophosphate) Table S2: List of tentatively characterized transformation products detected during OH radical reaction of TCEP using FT-ICR MS.
name neutral formula tentative structure m/z pos m/z neg Detected? (pos/neg) photolysis Parathion 292.0403 (H) pos (H)/- (lock mass) P1 (Paraoxon) 276.0632 (H) pos (H)/- < 0.25 ppm UV/H2O2 P2 C6H5NO3 138.0197 (H) -/neg (H) < 0.1 ppm direct and UV/H2O2 P3 (O,O-diethyl thiophosphate) 169.0094 (H) -/neg (H) < 0.3 ppm direct and UV/H2O2 P4 (O,O-diethyl phosphate) C4H11O4P 153.0322 (H) -/neg (H) < 0.1 ppm direct and UV/H2O2 P5 (O,O-diethyl phenyl thiophosphate) 247.0552 (H) 245.0407 (H) -/- Table S2: List of tentatively characterized transformation products detected during OH radical reaction of TCEP using FT-ICR MS.