[Organochlorine pesticide residues in the eggs from poultry raising farms].

A gas chromatography method was employed to investigate the residual amounts of chlororganic pesticides in a total of 37 average batch samples of eggs taken from 18 large poultry farms. More than two thirds (from 70.3 to 75.6 per cent) of the samples were shown to be free of p'p' DDE, p'p' DDT, and dieldrin, and more than one third (from 35.1 to 43.2 per cent)--of alfa and gamma hexachloran, heptachlor and heptachlorepoxide. In 88,4 per cent of the samples there were found residues of p'p' TDE (up to 0.061 ppm). The egg content showed trace amounts of DDT and metabolites--0.025 ppm, alfa and gamma hexacloran--0.016 ppm, heptachlor--0.006 ppm, heptachlorepoxide--0.01 ppm, and dieldrin--0.002 ppm. These amounts were much lower than the tolerance evaluations postulated by FAO/OMS and those accepted in other countries.