The aim of the study was to determine and compare the concentrations of chlorinated hydrocarbons residues (DDT, DDE, DDD, γ-HCH) in the milk fat of selected species of farm animals. The experiment was carried out on cow’s, sheep’s, goat’s, and mare’s milk samples originating from different parts of north-eastern Poland. The samples were prepared using Röse-Gottlieb’s and Ludwicki’s methods. The determination of the compounds was conducted with gas chromatography. All tested samples contained the residues of chlorinated hydrocarbons. The results varied depending on the animal species as well as the places of sample collections. The highest content of γ-HCH and ΣDDT was determined in cow’s milk (22.75; 53.12 μg/kg of fat, respectively). The lowest level of γ-HCH and ΣDDT was observed in sheep’s milk (0.25; 5.94 μg/kg of fat, respectively). The content of chlorinated hydrocarbons did not exceed the maximum acceptable levels of these compounds.
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