الفهرس | Only 14 pages are availabe for public view |
Abstract ()Determination of OCPs concentrations In this study we measured 12 OCPs; 3 DDTs; (pp- DDD, pp-DDT and pp-DDE), 2 HCHs; (HCH and -HCH), HCB, Heptachlor, Heptachlor-epoxide, Methoxychlor, Aldrin, Endrin and -chlordane in fish as following; (a)Wild fish Tilapia nilotica (Nile Tilapia) and Clarias gariepinus (Cat fish) that collected from Bahr Moyes , Zagazig , Sharkia, Egypt. (b)Farmed fish Tilapia nilotica that collected from Abbasa farm Abohammad, Sharkia, Egypt. (1) DTs (Dichlorodiphenyltrichloroethane and its derivatives): Results showed that out of 60 fish samples analyzed 16 (80%), 16 (80%), 12 (60%) of the examined Tilapia nilotica (Bahr Moyes), Clarias gariepinus (Bahr Moyes) and Tilapia nilotica (Abbasa) respectively, were positive for DDTs with an overall detection of 44/60 (73.3%). The mean residual concentrations (ng/g ww) of DDTs in the mentioned fish were 53.3±38.3, 62.0±31.9, 20.2±11.4 respectively. (2) HCHs (Hexachlorohexane isomers): Results showed that HCH isomers ( and isomers) were detected in 10 (50%), 18 (90%), 6 (30%) of the examined Tilapia nilotica (Bahr Moyes), Clarias gariepinus (Bahr Moyes) and Tilapia nilotica (Abbasa), respectively. The mean residual concentrations of HCHs (ng/g ww) in the mentioned fish were 2.1±1.7, 367.0±151.0 and1.9±1.9 respectively. |