Occurrence of pesticides used in tobacco farming in edible vegetables and environmental samples

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dc.contributor.authorMunjanja, Basil K.
dc.contributor.authorMadzivire-Penduka, Cecilia
dc.contributor.authorSanganyado, Edmond
dc.date.accessioned2013-12-13T10:07:45Z
dc.date.accessioned2023-06-26T12:58:55Z
dc.date.available2013-12-13T10:07:45Z
dc.date.available2023-06-26T12:58:55Z
dc.date.issued2013-09
dc.descriptionConference Proceeding. 6th SETAC Africa Conference, Lusaka Zambia September, 2013.en_US
dc.description.abstractA method was developed and validated for the analysis of chlorothalonil (CT), dimethoate (DM) and triadimenol (TD) in soil, surface water and edible green vegetables. In method development, A range of solvents were evaluated, and ethyl acetate was observed to be the best extracting solvent in soil and vegetable samples, while acetonitrile was the best extracting solvent in water samples. The effect of solvent type, solvent volume and extraction time on recovery of pesticides was studied. Analysis was carried on HPLC-UV a C18 column using a mobile phase comprising CH3CN/water (50:50, v/v) with a flow rate of 1.0ml/min in isocratic mode. The pesticides were extracted by ultrasonication and obtained recoveries in water, soil and vegetables ranged from 65-91 %. Furthermore, the detection limit in water, soil and vegetables was 0.01 µg/L, 2.8 µg/kg and 0.005 µg/kg, respectively. Limits of quantification ranged from 0.25-1.25µg/kg for vegetables, 1.35-2.3µg/kg and 0.02-0.05µg/l. Precision was measured in terms of the RSD, and values were less than 10%. The method was successfully applied to the analysis of incurred vegetable, soil and water samples from 3 farms from Bromley A2 agricultural area near Marondera, Zimbabwe. About 1.6µg/kg of CT was detected at one farm in soil samples, DM (0.025µg/l) was detected at another farm in well water. However, TD was not detected in all samples and no pesticides were detected in vegetable samples.en_US
dc.identifier.urihttp://196.220.97.103:4000/handle/123456789/363
dc.language.isoenen_US
dc.rights.licenseThis article was downloaded from NUST Institutional repository, and is made available under the terms and conditions as set out in the Institutional Repository Policy.en_US
dc.subjectChlorothalonilen_US
dc.subjectDimethoateen_US
dc.subjectTriadimenolen_US
dc.subjectPesticidesen_US
dc.subjectTobacco farmingen_US
dc.titleOccurrence of pesticides used in tobacco farming in edible vegetables and environmental samplesen_US
dc.typeLearning Objecten_US
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