Online Solid-Phase Extraction LC-MS/MS: A Rapid and Valid Method for the Determination of Perfluorinated Compounds at Sub ng·L⁻¹ Level in Natural Water

Table 4

m/z, declustering potential and collision energy used.

Analyte	Q1 precursion ion [M-h]^− (m/z)	Q3 product ion (m/z)	Declustering potential (DP)	Q2 collision energy (CE)
PFBA-1 perfluorobutanoic acid	213	169.1	−10	−14
PFPeA-1 perfluoropentanoic acid	263	219	−10	−12
PFBS-1 perfluorobutane sulfonic acid	299	80	−40	−70
PFBS-2 perfluorobutane sulfonic acid	299	98.8	−40	−40
PFHxA-1 perfluorohexanoic acid	313	269	−10	−13
PFHxA-2 perfluorohexanoic acid	313	119	−10	−30
PFHpA-1 perfluoroheptanoic acid	363	319	−10	−15
PFHpA-2 perfluoroheptanoic acid	363	169	−10	−20
PFHxS-1 perfluorohexansulfonic acid	399	79.9	−40	−100
PFHxS-2 perfluorohexansulfonic acid	399	98.9	−40	−76
PFOA-1 perfluorooctanoic acid	413	369	−10	−15
PFOA-2 perfluorooctanoic acid	41o3	169	−10	−20
PFNA-1 perfluorononanoic acid	463	419	−10	−15
PFNA-2 perfluorononanoic acid	463	168.9	−10	−25
PFOS-1 perfluorooctanesulfonic acid	499	80	−60	−120
PFOS-2 perfluorooctanesulfonic acid	499	99	−60	−100
PFDA-1 perfluorodecanoic acid	513	469.1	−10	−15
PFDA-2 perfluorodecanoic acid	513	218.9	−10	−22
PFUnDA-1 perfluoroundecanoic acid	563	519	−10	−15
PFUnDA-2 perfluoroundecanoic acid	563	269	−60	−140
PFDoDA-1 perfluorododecanoic acid	613	569	−10	−15
PFDoDA-2 perfluorododecanoic acid	613	269	−10	−20
MPFBA-labeled perfluorobutanoic acid	217	171.9	−10	−14
M5PFPeA-labeled perfluoropentanoic acid	268	233	−10	−12
M3PFBS-labeled perfluorobutane sulfonic acid	302	99	−40	−70
M5PFHxA-labeled perfluorohexanoic acid	318	273	−10	−13
M4PFHpA-labeled perfluoroheptanoic acid	367	322	−10	−20
M3PFHxS-labeled perfluorohexansulfonic acid	402	99	−40	−100
M8PFOA-labeled perfluorooctanoic acid	421	376	−10	−14
M8PFOS-labeled perfluorooctanesulfonic acid	507	99	−60	−100
M9PFNA-labeled perfluorononanoic acid	472	427	−10	−15
M6PFDA-labeled perfluorodecanoic acid	519	474	−10	−15
M7PFUdA-labeled perfluoroundecanoic acid	570	525	−10	−15
MPFDoDA-labeled perfluorododecanoic acid	615	570	−10	−15