Fig 8. Comparison of extracted ion chromatograms of steranes (m/z of 217) for Galveston Bay and Deepwater Horizon oil spill residues [Peak 1: DiaC27βα(S); Peak 2: DiaC27βα(R); Peak 3: C27ααα(S); Peak 4: C27αββ(R); Peak 5: C27αββ(S); Peak 6: C27ααα(R); Peak 7: C28ααα(S); Peak 8: C28αββ(R); Peak 9: C28αββ(S); Peak 10: C28ααα(R); Peak 11: C29ααα(S); Peak 12: C29αββ(R); Peak 13: C29αββ(S); Peak 14: C29ααα(R)].
