Determination of aromatics and naphthenes in straight run gasoline by H-1 NMR spectroscopy. Part I

A H-1 NMR-based method has been developed for determining the composition ( aromatics, naphthenes and paraffins) of straight run gasoline fractions. Th e equations required for the calculations have been derived based on the as signment of the overlapped H-1 NMR spectra of the samples with particular e mphasis on signals from naphthenes and iso-paraffins. The H-1 NMR results h ave been compared with those obtained from GC method. The absolute standard deviations between the NMR and GC methods are 1.7 and 2.1% for total aroma tics and naphthenes, respectively. (C) 2000 Elsevier Science Ltd. All right s reserved.