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A profile for rare earth elements (REE) of crude oils from the offshore – shallow water and onshore fields in the Niger Delta, analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) is reported. The oil samples were prepared for ICP-MS measurement by acid digestion into colourless aqueous solution. The analysis method was validated using standard reference materials SLRS-4 and NIST-1640...
Ten trace elements were determined by graphite furnace atomic absorption spectrometry (GFAAS) in fifteen kerogen samples from five wells obtained from the paralic sequence Agbada formation in the Niger delta basin. The concentrations of the elements (As, Cd, Cr, Co, Cu, Fe, Mn, Ni, Pb and V) determined ranged from 0.374 to 667.340ppb with a mean value of 77.434ppb (%RSD<5) for the kerogen samples...
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