Fig. 5

Chromatographic profiles obtained by Py(HMDS)–GC–MS of sample 1_black2 (late twentieth century. a Total ion chromatogram; b extracted ion chromatogram of the ion with m/z 179, showing CT5) 3-pentylcatechol (TMS), CT6) 3-hexylcatechol (TMS), CT7) 3-heptylcatechol (TMS), CT8) 3-octylcatechol (TMS), CT9) 3-nonylcatechol (TMS), Ph15) 3-pentadecylphenol (TMS), CT15) 3-pentadecylcatechol (TMS), 2-ωPh10) 2-(10-phenyldecyl)phenol, 3-ωPh10) 3-(10-phenyldecyl)phenol, 3-ωCT10) 3-(10-phenyldecyl)catechol, 2-ωPh12) 2-(12-phenyldodecyl)phenol, 3-ωPh12) 3-(12-phenyldodecyl)phenol, 3-ωCT12) 3-(12-phenyldodecyl)catechol, c extracted ion chromatogram of the ion with m/z 91, showing B3) propylbenzene, B4) butylbenzene, B5) pentylbenzene, B6) hexylbenzene, B7) heptylbenzene, B8) octylbenzene, B9:1) nonenylbenzene, B10) decylbenzene, B11:1) undecenylbenzene, B12) dodecylbenzene, d extracted ion chromatogram of the ion with m/z 57, showing C9) nonane, C10) decane, C11) undecane, C12) dodecane, C13) tridecane, C14) tetradecane, C15) pentadecane, C16) hexadecane, C17) heptadecane