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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12430

Title: Health risk assessment of pesticides residue inmaize and cowpea from Ejura, Ghana
Authors: Akoto, O.
Andoh, H.
Darko, G.
Eshun, K.
Osei-Fosu, P.
Keywords: Maize
Cowpea
Pesticide residues
Ejura
Ghana
Issue Date: 2013
Publisher: Elsevier Ltd.
Citation: Chemosphere 92 (2013)67–73., http://dx.doi.org/10.1016/j.chemosphere.2013.02.057
Abstract: Low productivity inagriculture due todamage cause bypests has led tothe application ofpesticides to control pest infestation. Residues ofpesticides applied oncrops are often found inthe food which can cause chronic effect onthe health ofhumans who consume such products.The aim ofthis study isto measure pesticides residues inmaize and cowpea and compare the values with stablished safety limits. A total of37pesticides comp rising 15organochlorines,13organophosphorus and 9pyrethroids pesti- cides were identified inmaize and cowpea samples obtained from farms inEjura.Analytical methods included solvent extraction ofthe pesticide residues and their subsequent quantificationusing gas chro- matograph equipped with Electron Capture Detector and Pulse Flame Photometric Detector after clean- up onalumina/activated charcoal column.The results showed that the mean concentration ofpesticides in maize ranged from 0.001 to0.103 mgkg 1 for organochlorine pesticides,0.002–0.019mgkg 1 for organophosphorus pesticides and 0.002–0.028mgkg 1 for pyrethroids pesticides. Incowpea the mean concentration ranged from 0.001 to0.108 mgkg 1 for organochlorine pesticides, 0.002–0.015mgkg 1 for organophosphorus pesticides and 0.001–0.039mgkg 1 for pyrethroids pesticides. Maximum Residue Limits for b-HCH, b-endosulfan, p,p0-DDE and p,p0-DDD were exceeded inboth maize and cowpea sam- ples. Health risk estimation revealed that residues ofheptachlo r,dieldrin,endrin, b-endosulfna, c-chlordane and chlorfenvinphos found inmaize exceeded the Acceptable Daily Intake.Similarly the levels of heptachlor and p,p0-DDD found in cowpea also exceeded the Acceptable Daily Intake.This suggests a great potential for chronic toxicity toconsumers ofthese food items.
Description: An article published by Elsevier Ltd. and also available at http://dx.doi.org/10.1016/j.chemosphere.2013.02.057
URI: http://hdl.handle.net/123456789/12430
Appears in Collections:College of Science

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