| Summary: | [b]Abstract[/b]. The experimental part covers the description of the sampling places of sediments which were taken from Kampinos National Park and the description of their preparation for analysis. Namely: in the samples of sediments, the total content of selected elements (Cr , Zn , Mn , Fe, Cu , Cd, Pb) and the content of these elements in the fractions separated by sequential extraction were marked. In order to isolate the appropriate fractions, the Tessier method was used. The method allows the separation of five fractions: I — exchangeable metals, II — metals associated with carbonates, III — metals associated with hydrated iron ions and manganese oxides, IV — metals associated with organic matter, V — metals associated with aluminosilicates. It was examined in terms of the total content of heavy metals, and to check if the content of elements in the individual fractions of the test sediments depends on the pH and the percentage of organic matter in the studied sediments.Based on the survey, it was found that the studied sediments can be classified as uncontaminated, from the point of view of their content of Cr, Zn, Cu, Cd and Pb. Moreover, it was proved that both, the total content of analytes and the distribution of the percentage content of the determined heavy metals in the individual fractions in the test sediments depend on the content of organic matter, on the pH of the tested sediments and its type.[b]Keywords:[/b] analytical chemistry, environmental protection, speciation analysis, sediments, heavy metals
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