Use of oxidative degradation followed by capillary gas chromatography-mass spectrometry and multi-dimensional scaling analysis to fingerprint unresolved complex mixtures of hydrocarbons

Applications of Biomarkers for Identifying Sources of Natural and Pollutant Hydrocarbons in Aquatic Environments

“…Using chemical degradation techniques, Gough and Rowland (49) showed that the UCM consists primarily of linear chains connected at branch points giving rise to "T-shaped" molecules. The UCM can provide limited fingerprinting information, especially for oiloil correlation of biodegraded oils (50). Some authors have suggested that some UCMs may arise from recent biotic sources, but we have no data to support this view.…”

Paleogene and Cretaceous sediment cores from the Kilwa and Lindi areas of coastal Tanzania: Tanzania Drilling Project Sites 1–5

“…The saturated hydrocarbon fraction has a very different distribution pattern from all other TDP saturated hydrocarbon fractions. It contains a relatively large UCM (unresolved complex mixture; ''hump''), typical of heavily biodegraded organic material (including petroleum; Magoon and Claypool, 1985;Rowland, 1990, 1991;Gough et al, 1992;Revill, 1992;van Dongen et al, 2003). In addition, the hopanes/hopenes and steranes have a thermally mature distribution, characterized by stereoisomers occurring in thermodynamic equilibrium ratios (e.g.…”

Chemometrics reveals oil sources in the Fangzheng Fault Depression, NE China

“…MDS has already been used to evaluate data from many disciplines (Shi et al, 2000;Lenz and Foran, 2010;Hollemeyer et al, 2012), including biomarker data (Revill et al, 1992;Zhou et al, 2015). Classical MDS generally uses the Euclidean distance to distinguish data sets, http://dx.doi.org/10.1016/j.orggeochem.2016.09.008 0146-6380/Ó 2016 Elsevier Ltd. All rights reserved.…”