Contamination of Water, Sediment and Fish with Residues of Pesticides Used in Cotton Production in Northern Benin

In Northern Benin, insecticides are used for cotton production. These can be easily transferred to water ponds close fields. To monitor levels in water, sediments and fish samples from ponds, a GC–MS analytical method was developed detect residues of endosulfan, DDT its parent compounds, isomers HCH, pyrethroids chlorpyrifos. addition, the influence storage conditions sample on pesticides determination performance has been studied. The limits quantification were between 0.16 0.32 µg/L 0.5 1 μg/kg sediment 2 fish. Twenty twenty forty taken four different reservoirs at five times. Alpha-endosulfan, lambda-cyhalothrin permethrin identified while p,p′-DDE, α- β-HCH, chlorpyrifos, detected Only organochlorines determined because lack recovery stored glass. Concentrations insecticide all ranged non-detected 101 µg/kg 36 Preliminary risk assessment consumers North Benin showed that Estimated Daily Intakes lower than Acceptable Acute Reference Doses consumers. However, as one contaminated by pesticide same time, it is not possible exclude consumer due his exposure mixtures pesticides.