The fluorescence features of seawater with dissolved crude oil components during continuous 13 day mixing of water and oil are considered. Four specific fluorescence peaks are identified. Two of them are connected with polyaromatic hydrocarbons, and two other peaks, with high molecular organic com pounds. It is shown that the fluorescence spectrum of dissolved components of crude oil is not constant. Spectral features suitable for identification of dissolved crude oil in seawater are distinguished.

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