Chemical and toxicological characterization of an unresolved complex mixture‐rich biodegraded crude oil

Chemical and toxicological characterization of unresolved complex mixtures in the water‐soluble fraction of an artificially weathered Norwegian Sea crude oil was determined by a combination of chemical analysis and toxicity testing in fish in vitro bioassays. The water‐soluble fraction of the crude oil was separated into 14 increasingly polar fractions by preparative high‐pressure liquid chromatography. The in vitro toxicity (7‐ethoxyresorufin

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