Liquid Chromatography-Tandem Mass Spectrometry Analysis of Perfluorooctane Sulfonate and Perfluorooctanoic Acid in Fish Fillet Samples

Table 1

Ionization and fragmentation conditions for PFOS and PFOA, using an ESI source in negative ion mode.

Compound name	Precursor ion (Da)	Product ion (Da)	Dwell time (ms)	Fragmentor energy (V)	Collision energy (eV)
^13C4-PFOS	503	99	100	200	48
^13C4-PFOS	503	80	100	200	56
PFOS	499	99	100	200	48
PFOS	499	80	100	200	56
^13C4-PFOA	417	372	100	80	4
^13C4-PFOA	417	172	100	80	16
PFOA	413	369	100	80	4
PFOA	413	169	100	80	16