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2011

GC-MS characterization of Nigerian gulf heavy crude oil fractions

Author:Odebunmi, E.O and R.O Ismaeel

Abstract:
Gulf heavy crude oil samples were separated into four fractions of saturates, mono-, di-and polyaromatics by elution open column chromatography. Alumina and a mixture of equal amount of silica and alumina stationary phases were separately used to study the effect of these stationary phases on the separation. The Gas Chromatography ? Mass Spectrometry (GC ? MS) results of the fractions show that the nature of the stationary phase may affect the elution of both aromatic and the saturate components of the oil. The pristane/phytane ratio ranging from 0.63-2.00 obtained for the crude oil fractions using the two stationary phases indicates an oxygen depositional environment for the source rocks.