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. Author manuscript; available in PMC: 2021 Aug 5.
Published in final edited form as: Energy Fuels. 2021 Jun 16;35(13):10529–10539. doi: 10.1021/acs.energyfuels.1c00892

Figure 7.

Figure 7.

KMD analyses of IMS-MS data for a Louisiana crude oil. Features (Supplemental Table 16) were plotted for analyses using CH2 and H KMD scales. (A) KMD-CH2 vs m/z plot showing horizontal homologous series of filtered features (n = 1258). (B) KMD-CH2 vs DTCCSN2 plot shows library-matched anchor features in black (n = 24). (C) KMD-H vs m/z plot organizes homologous series by carbon number and molecular class. (D) KMD-H vs DTCCSN2 plot. Consistent with PIANO gasoline standard KMD plots (Figure 3), red rectangles (see Figure 8) depict features in isomeric series (×, n = 4), distinguishable by DTCCSN2. Elemental shifts were used to assign formulas to homologous series (open circles) from nonseries features (open triangles). Features without molecular formula assignments are shown as open squares.