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Abstract
Graphite furnace atomic absorption spectroscopic (GFAAS) analysis of oil samples from the onshore and offshore fields in the Niger Delta was carried out in order to determine their trace element contents. The concentrations of the elements (Cr, Co, Cu, Fe, Mn, Ni, Pb, and V) determined ranged from 0.151–941.199 ppb with an average of 30.190 ppb (% RSD<5) for the oil samples analyzed. The pattern of occurrence of each element was in agreement with studies conducted employing neutron activation analysis and flame atomic absorption spectroscopy. From the cluster analysis of the data, two groups of oils were evident. The groups are correlated with each other, indicating common or similar genetic origin. Trace metal parameters indicate that the oils were generated from organic matter of strong terrestrial input. GFAAS proved to be a good method for the analysis of elemental composition and classification of Niger Delta oils.
A. Akinlua is on a postdoctoral research visit from the Department of Chemistry, Obafemi Awolowo University, Ile‐Ife, Nigeria.
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Acknowledgments
We thank Chevron Nigeria Limited (CNL) for releasing the samples for this study. We are also very grateful to the Organization for the Prohibition of Chemical Weapons (OPCW) which financed the research of A. Akinlua at the University of Botswana, Gaborone, Botswana.
Notes
A. Akinlua is on a postdoctoral research visit from the Department of Chemistry, Obafemi Awolowo University, Ile‐Ife, Nigeria.