Abstract
Pesticides are compounds that used by human being, especially farmers for controlling biotic factors for a long time and bring a lot of environmental problems. Among these compounds chlorine incecticide sprays have high half-life, and high lipophilicity characteristic. Due to having chloronic consequences, it is necessary to evaluate and analyse in the environment especially in foods and also in fishes which have high fat and may carry this kind of insecticides . In the present study we have investigated the residues of chloride organoinsecticides such as D.D.T, D.D.E in the four kinds of fishes in the Caspian Sea. In this investigation we have selected four different kinds of fishes, which are highly used, and available in the Caspian Sea viz., Sefid - koli- kilca – kefal from four different hunting region viz., Chalous and Babolsar city and Khazar Abad and Miankaleh in 2004. After cleaning, we prepared hun muscle of the fished. Then, after the process of extraction, we distilled them in vacuum by means of organic solvent and determined the residues by Gas Chromatography (GC) with ECD detector. The results of insecticides analysis in four kinds of fishes been showed that the kafal in the Babolsar had the highest amount of D.D.T (0.031 ppm) followed by sefid in Babolsar (0.03ppm) (P
