Investigations were undertaken in the north-west part of the Tucholski Landscape Park (northern Poland). Samples were collected from soil adjacent to the banks of Lakes Suszek, Śpierewnik, Grochowskie, Raciąż and Stobno. The compounds were adsorbed by the solid-phase extraction method on octadecyl (C 18) layers, separated by thin-layer chromatography (TLC) and gas chromatography (GC) methods and analysed by the densitometry and mass spectrometry (MS) techniques respectively. In samples, phenol, 4-methylphenol, 4-nitrophenol, chlorophenols, chlorocatechols, chloroguaiacols, chlorosyringols, 3,4,5-trichloroveratrole, 5,6-dichlorovaniline and several monoterpenes were determined. The increase of the number and concentrations of the compounds investigated in summer and spring was stated.
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