Tar balls and oil slicks were sampled on several beaches in the Canary Islands and analyzed, along with reference crude oils, for n-alkanes and polycyclic aromatic hydrocarbons by gas chromatography and spectrofluorimetry, respectively. Statistical treatment of the data including intercorrelations, Factor Analysis and Cluster Analysis allow the identification of most of source-crudes.
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Conde et al. (1996) studied this question.
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