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Peaks | tR (min) | Conc. (ng/L) | Precursor Ion | Product Ion | |
---|---|---|---|---|---|
1. | Perfluoropropanoic acid (PFPrA) | 2.74 | 80 | 162.9 | 119.0 |
2. | Perfluorobutanoic acid (PFBA) | 4.69 | 80 | 212.8 | 169.0 |
3. | Perfluoropropanesulfonic acid (PFPrS) | 5.13 | 80 | 248.8 | 79.6 |
4. | Perfluorobutanesulfonic acid (PFBS) | 6.14 | 80 | 298.8 | 79.9 |
5. | Perfluoro-n-[1,2-13C2]hexanoic acid (13C2-PFHxA) | 6.75 | 50 | 314.9 | 270.0 |
6. | Hexafluoropropylene oxide-dimer acid (HFPO-DA) | 6.92 | 80 | 285.0 | 168.9 |
Peaks | tR (min) | Conc. (ng/L) | Precursor Ion | Product Ion | |
---|---|---|---|---|---|
7. | Ammonium 4,8-dioxa-3H-perfluorononanoate (ADONA) | 7.33 | 80 | 376.9 | 250.7 |
8. | Perfluorooctanoic acid (PFOA) | 7.70 | 80 | 413.1 | 368.9 |
9. | Perfluoro-[1,2-13C2]octanoic acid (13C2-PFOA) | 7.70 | 50 | 415.0 | 370.0 |
10. | Perfluorooctanesulfonic acid (PFOS) | 8.01 | 80 | 498.8 | 80.0 |
11. | Perfluoro-[1,2,3,4-13C4]octanesulfonic acid (13C4-PFOS) | 8.01 | 50 | 503.0 | 80.0 |
12. | 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonate (9Cl-PF3ONS) | 8.15 | 80 | 530.8 | 350.7 |
13. | 11-Chloroeicosafluoro-3-oxanonane-1-sulfonate (11Cl-PF3OUdS) | 8.61 | 80 | 630.7 | 451.0 |
Column | Raptor C18 (cat.# 9304A1E) | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dimensions: | 100 mm x 3 mm ID | ||||||||||||||||||||||||
Particle Size: | 2.7 µm | ||||||||||||||||||||||||
Pore Size: | 90 Å | ||||||||||||||||||||||||
Temp.: | 40 °C | ||||||||||||||||||||||||
Standard/Sample | |||||||||||||||||||||||||
Conc.: | 80 ppt | ||||||||||||||||||||||||
Inj. Vol.: | 10 µL | ||||||||||||||||||||||||
Mobile Phase | |||||||||||||||||||||||||
A: | Water, 5 mM ammonium acetate | ||||||||||||||||||||||||
B: | Methanol | ||||||||||||||||||||||||
|
Detector | MS/MS |
---|---|
Ion Mode: | ESI- |
Mode: | MRM |
Instrument | UHPLC |
Sample Preparation | In a polypropylene vial, 250 µL of reagent water (fortified at 80 ppt) was mixed with 250 µL of 40:60 reagent water:methanol and 5 µL of internal standard solution (5 ng/mL of 13C2-PFHxA, 13C2-PFOA, 13C4-PFOS in methanol). The vial was capped with a polyethylene cap prior to analysis. |
Notes | A PFAS delay column (cat.# 27854) was installed between the pump mixer and the injector. |
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