DETERMINATION OF PARAFFINIC, NAPHTHENIC AND AROMATIC CARBON IN PETROLEUM DERIVED MATERIALS BY CARBON-13 NMR SPECTROMETRY

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Abstract
A carbon-13 NMR method gives results for paraffinic, naphthenic, and aromatic carbon which compare well with those obtained from ASTM D2140. In order to be fully applicable for analysis by NMR, the sample must be of natural origin - preferably petroleum, shale oil or tar sands - and boil above about 200°C. Otherwise, the samples may have been processed or separated by any method. The rationale for the present method, the restricted applicability of other NMR methods, and prospects for further detailed information on carbon functional groups are discussed.