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. Author manuscript; available in PMC: 2023 Jun 1.
Published in final edited form as: Fuel (Lond). 2022 Feb 12;317:123547. doi: 10.1016/j.fuel.2022.123547

Figure 1. GC-MS full scan analysis of petroleum UVCB products included in this study.

Figure 1.

(A) Superimposed GC-MS total ion chromatograms (time vs. abundance) for representative samples (see Table 1 for sample annotations). Individual chromatograms for each sample are shown in Supplemental Figure 1. (B) Hierarchical clustering analysis of the average abundance of the detected compound ion fragments in a mass range of 40–500 amu in 10,127 scans (see Supplemental Table 2 for the raw data). Both samples (columns) and features (rows) were clustered (Spearman correlation, average linkage method). Feature abundance was z-scaled for each sample with lower abundance features indicated by light blue and higher abundance features indicated by dark blue colors.