Browsing by Author "Sanganyado, Edmond"
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- ItemAnalysis of acrylamide in traditional foodstuffs in Zimbabwe(Academic Journals, 2011) Sanganyado, Edmond; Parekh, Champaklal T.; Eriksson, S.We carried out a preliminary study on the occurrence of acrylamide in potentially high risk traditional foodstuffs consumed in Zimbabwe. Various studies have shown that acrylamide, a ‘probable human carcinogen’, is formed by high temperature thermal processing of carbohydrate rich foodstuffs (lnternational Agency for Research on Cancer, 1994). Acrylamide concentrations in roasted maize, groundnuts, soy beans and boiled maize were determined using liquid chromatography tandem mass spectrometer (LC-MS/MS). The relative standard deviation of the analytical technique was 5% and the limit of detection was 0.02 μg/kg. Acrylamide was not detected in boiled maize. Roasted maize contained 450 μg/kg acrylamide. Roasted groundnuts had 140 μg/kg and finally, roasted soybeans with a concentration of 70 μg/kg acrylamide.
- ItemOccurrence of pesticides used in tobacco farming in edible vegetables and environmental samples(2013-09) Munjanja, Basil K.; Madzivire-Penduka, Cecilia; Sanganyado, EdmondA 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.