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. Author manuscript; available in PMC: 2024 Jan 1.
Published in final edited form as: Regul Toxicol Pharmacol. 2022 Dec 5;137:105310. doi: 10.1016/j.yrtph.2022.105310

Figure 3.

Figure 3.

Example visualizations commonly used to represent hydrocarbon composition of petroleum substances analyzed using high resolution MS techniques. (A) A Kendrick mass defect (KMD) plot demonstrating repetitive patterns of CH2-containing molecules in a petroleum sample. (B) A DBE vs carbon number plot indicating the relative proportions of molecules varying by their degree of aromaticity and carbon number in a sample. (C) van Krevelen plot display the degree of oxidation by plotting the H/C versus O/C ratio in a sample. (D) A stacked bar plot showing relative proportions of constituents from various chemical groups. (E) A plot of relative amounts of various hydrocarbon blocks in a sample.