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Quadrupole Isolation

(+) ESI 9.4 T FT-ICR MS Deepwater Horizon Oil Spill Contaminant. Figure S1. Broadband. Quadrupole Isolation. m/z. 400. 600. 800. 1000. Figure S2. + 2.00424. = m/z 425.42390. (+) ESI 9.4 T FT-ICR MS. C 28 H 55 O 1 18 O 1 S/N<1. C 28 H 55 O 2 m/z 423.41966 * m/z 423.419657

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Quadrupole Isolation

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  1. (+) ESI 9.4 T FT-ICR MS Deepwater Horizon Oil Spill Contaminant Figure S1 Broadband Quadrupole Isolation m/z 400 600 800 1000

  2. Figure S2 + 2.00424 = m/z 425.42390 (+) ESI 9.4 T FT-ICR MS C28H55O118O1 S/N<1 C28H55O2 m/z 423.41966 *m/z 423.419657 S/N 605 150 ppb Quadrupole Isolation 500 Acquisitions Deepwater Horizon Oil Spill Contaminant 425.42 423.41 425.422 425.424 423.42 410 415 420 425 430 435 440 m/z

  3. C28H55O118O1 S/N < 1 *Calculated C28H55O118O1 m/z 425.42390 *m/z 425.423904 21 ppb S/N 7.6 m/z 425.420 425.422 425.424 (+) ESI 9.4 T FT-ICR MS Deepwater Horizon Oil Spill Contaminant Figure S3 C27H43O2 13C2 S/N 53.1 Quad Isolation C27H53 N1O22D1 S/N<0 C24H46N1O2S113C1 S/N 28.2 C29H43O118O1 m/z 425.33010 *m/z 425.330003 219 ppb S/N = 6.4 C25H45O5 S/N 25.5 C27H43O2 13C2 S/N 135.9 SWIFT Isolation C29H43O118O1 m/z 425.33003 *m/z 425.330003 117 ppb S/N 19.8 C24H46N1O2S113C1 S/N 97.0 C25H45O5 S/N 65.7 C27H53 N1O22D1 S/N 4.4 m/z 425.326 425.330

  4. (+) ESI 9.4 T FT-ICR MS Heavy Crude Oil SWIFT A C33H54N1 S/N ≈ 2632 1 Acquisition C32H54N113C1 Figure S4 C33H54N1 S/N ≈ 1726 SWIFT B 1 Acquisition C32H54N113C1 m/z 464 465 466 464 465 466

  5. Signal Magnitude ≈ 1.6 (+) ESI 9.4 T FT-ICR MS Heavy Crude Oil C33H53N12D1 465.43129 *465.43125 S/N = 7.3 76 ppb 465.432 465.434 465.436 C33H53N12D1 465.43130 *465.43125 S/N = 14.0 105 ppb 465.432 465.434 465.436 C32H53N2 S/N 47.4 C33H5415N1 465.42211 *465.42211 S/N = 3.1 40 ppb SWIFT A C30H58 S115N1 S/N 13.3 1 Acquisition Figure S5 Signal Magnitude ≈ 1.3 C32H53N2 S/N 43.1 SWIFT B 1 Acquisition C33H5415N1 465.42200 *465.42211 S/N = 8.7 249 ppb *Calculated C30H58 S115N1 S/N 12.1 465.420 465.421 465.422 465.423 465.424 465.425 465.426 465.427

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