Time-dependent multivariate and spectroscopic characterisation of oil residue in Niger Delta soil.

In this paper, we present a detailed evaluation of changes in the oil residue in soil following a spill using weathering indices obtained from analytical instruments such as UV, IR, GC, and H NMR, and chemometrics based on the time of spill in the Niger Delta region of Nigeria. UV, IR and H NMR spectra of eight (8) oil residue samples were analyzed. The PCA of the UV and IR spectrometric index showed that the first two PCs accounted for 87 and 71% of the variance of the index, respectively.