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Perfluorinated Alkyl Acids on Raptor C18 by LC-MS/MS for EPA Method 537
Peaks tR (min) Conc. (ng/mL) Precursor Ion Product Ion
1. Perfluorobutanesulfonic acid (PFBS) 1.98 10 299.10 79.99
2. Perfluoro-n- [1,2-13 C2 ]hexanoic acid (13 C-PFHxA) 2.92 10 315.13 270.13
3. Perfluorohexanoic acid (PFHxA) 2.93 10 313.10 269.12
4. Perfluoroheptanoic acid (PFHpA) 4.00 5 363.16 319.09
5. Perfluorohexanesulfonic acid (PFHxS) 4.14 10 399.13 79.98
6. Perfluoro-[1,2-13 C2 ]octanoic acid (13 C-PFOA) 4.83 5 415.13 370.10
7. Perfluorooctanoic acid (PFOA) 4.83 5 413.16 369.10
8. Perfluorononanoic acid (PFNA) 5.50 5 463.16 419.19
9. Perfluoro-1-[1,2,3,4-13 C4 ]octanesulfonic acid (13 C-PFOS) 5.54 5 503.13 79.98
10. Perfluorooctanesulfonic acid (PFOS) 5.54 10 499.17 79.98
11. Perfluoro-n- [1,2-13 C2 ]decanoic acid (13 C-PFDA) 6.06 5 515.17 470.17
12. Perfluorodecanoic acid (PFDA) 6.07 5 513.17 469.16
13. N-deuteriomethylperfluoro-1-octanesulfonamidoacetic acid (d3-NMeFOSAA) 6.28 5 573.23 419.15
14. N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) 6.28 5 570.20 419.17
15. N-deuterioethylperfluoro-1-octanesulfonamidoacetic acid (d5-NEtFOSAA) 6.52 5 589.27 419.11
16. N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) 6.52 5 584.20 419.18
17. Perfluoroundecanoic acid (PFUnA) 6.56 5 563.23 519.24
18. Perfluorododecanoic acid (PFDoA) 6.98 5 613.23 569.19
19. Perfluorotridecanoic acid (PFTrDA) 7.35 5 663.23 619.21
20. Perfluorotetradecanoic acid (PFTA) 7.67 5 713.23 669.23
LC_EV0548
Raptor C18 (cat.# 9304552) 50 mm x 2.1 mm ID 5 µm 90 Å 40 °C 96:4 Methanol:water 5–10 ng/mL 2 µL 5 mM ammonium acetate in water Methanol Time (min) Flow (mL/min) %A %B 0.00 0.4 75 25 8.00 0.4 15 85 8.01 0.4 75 25 9.00 0.4 75 25
MS/MS Electrospray ESI- MRM Waters ACQUITY
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