Hydrocarbons characterization in coastal sediments of the Argentine Patagonia using the nuclear magnetic resonance (NMR) spectroscopy |
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| Authors: | Stella Maris Ríos Mercedes Barquín Norma Nudelman |
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| Institution: | (1) Department of Chemistry, Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco. Km 4, 9000 Comodoro Rivadavia, Chubut, Argentina;(2) Department of Organic Chemistry, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Pab. II, P. 3, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
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| Abstract: | Hydrocarbons in Patagonian sediments were analyzed to evaluate their biogenic or petrogenic origins. Structural determination
by 1H-NMR spectrometry and principal component analysis (PCA) show that the first two principal components accounted for more
than 75.7% of the variance. The results indicate that biogenic hydrocarbons have mainly linear hydrocarbon chains and polar
groups (high H2, H4, H5, and HCOOH), while petrogenic hydrocarbons show more branched chains and mainly mono-aromatic components, e.g., crude oil (high H1, H1A, and H3) or mainly poly-aromatic components (high H4, and H2A) in weathering oil. |
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