Abstract
Unresolved complex mixtures (UCMS) of hydrocarbons are a common feature of the gas chromatograms of bacterially degraded crude oils, some refined oils ( e.g., lube oils) and of oil-polluted sediment extracts. It is often difficult to identify the original source oil in polluted sediments by existing methods. A study was made of the use of chemical oxidation of ten UCMs to yield gas chromatographically resolvable compounds and analysis of the oxidation products by quantitative gas chromatography-mass spectrometry. The data were then used to calculate inter-sample Euclidean distances. These values were input into a multi-dimensional scaling program which allows similar samples to be clustered. This technique allows UCMs in a number of different sediments to be compared with their likely source oils.
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