Table 3.

Compound-specific Quattro Premier XE MSMS parameters.

Compound name	Parent (m/z)	Daughter (m/z)	Cone (V)	Collision (V)
GenX 1°	329.07	284.06	10	5
GenX 2°	329.07	184.72	10	23
${}^{13}{\mathrm{C}}_3$ GenX IS	332.00	287.06	10	5
PFHxA 1°	312.91	268.81	15	9
PFHxA 2°	312.91	118.64	15	25
${}^{13}{\mathrm{C}}_2$ PFHxA IS	315.00	269.81	15	9
PFHxS 1°	398.85	98.57	55	37
PFHxS 2°	398.85	79.62	55	41
${}^{13}{\mathrm{C}}_3$ PFHxS IS	401.85	79.62	55	41
PFOA 1°	412.93	368.84	15	11
PFOA 2°	412.93	168.63	15	21
${}^{13}{\mathrm{C}}_4$ PFOA IS	417.00	372.00	15	11
PFOS 1°	499.00	98.57	60	41
PFOS 2°	499.00	79.62	60	45
${}^{13}{\mathrm{C}}_4$ PFOS IS	503.00	98.57	60	41
ADONA 1°	377.02	250.83	15	13
ADONA 2°	377.02	84.70	15	29
PFESA1 (Nafion, BP 1) 1°	442.98	146.69	35	29
PFESA1 (Nafion, BP 1) 2°	442.98	262.79	35	19
PFNA 1°	463.00	418.90	15	13
PFNA 2°	463.00	218.84	15	17
${}^{13}{\mathrm{C}}_5$ PFNA IS	468.00	423.00	15	13

Note: 1° denotes the primary multiple reaction monitoring (MRM) transition for a compound used for quantitative analysis and 2° denotes the secondary MRM transition for a compound used for qualitative identification confirmation. ADONA, 4,8-dioxa-3H-perfluorononanoate; GenX Free Acid, perfluoro-2-propoxypropanoic acid; MSMS, tandem mass spectrometry; PFESA1, perfluoro-3,6-dioxa-4-methyl-7-octene-1-sulfonic acid; PFHxA, perfluorohexanoic acid; PFHxS, perfluorohexanesulfonic acid; PFNA, perfluorononanoic acid; PFOA, perfluoro-n-octanoic acid; PFOS, perfluorooctanesulfonic acid; PFPeS, perfluoropentanesulfonic acid; Quattro Premier XE, triple quadrupole mass spectrometer.