Abstract
Abstract In 1993-94, sediment samples of the aquatic system comprising Lake Ladoga, the Neva River and the Eastern Gulf of Finland were collected to determine the content of 3,4-benzopyrene (3,4-PB) as an indicator of polycyclic aromatic hydrocarbons in the environment. Two methods were used: (1) microspectrofluorom-etry with quasi-linear spectra fluorescence and (2) high-performance liquid chromatography. Results show the heterogeneous distribution of 3,4-benzopyrene in the sediments. The highest concentrations (20 to 100 µg kg−1) were found in Lake Ladoga, near urban areas, and in the Neva River, near industrial compounds. High concentrations were also detected in the central part of Neva Bay and near a resort in the Gulf of Finland.
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