Calculation Of Persistent Organo-Chlorine Residues In A Fresh Water Fish By GLC And Find Out Their Accumulation Pattern
Residues of various pesticides in a commercial fresh water catfish, Heteropneustes fossilis were measured. This
study is relevant because of possible toxicological exposure to fish eaters by way of consuming such fish containing
pesticides. Tissue extracts obtained by Soxhlet apparatus were used for analysis and the concentrations of analytes were
determined by gas chromatography with electron capture detection. The organochlorines found in edible portion of fish
(i.e.flesh) were mainly- Endosulfan, Delta-HCH, Aldrine , pp-DDE etc. The concentration of these organochlorines were at
or above the theoretical threshold limit and hence are supposed to be effectively toxic to fish eaters.
Keywords— Heteropneustes fossilis, organochlorines, endosulfan, hexachlorocyclo hexane (HCH), gas chromatography