University of Khartoum

Assessment of Heavy Metals Contamination and Anti-nutritional Factors in Some Vegetables and Canned Foods in Khartoum state

Assessment of Heavy Metals Contamination and Anti-nutritional Factors in Some Vegetables and Canned Foods in Khartoum state

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Title: Assessment of Heavy Metals Contamination and Anti-nutritional Factors in Some Vegetables and Canned Foods in Khartoum state
Author: Mohamed Saeed Adam, Aziza
Abstract: The objectives of this work were to determine the heavy metals contamination and anti-nutritional factor in some vegetables and canned foods of common consumption in Khartoum state. The heavy metals were lead, cadmium, nickel, arsenic and copper and the anti-nutritional factors were phytic acid and tannins. Five vegetables were considered, namely: tomato, carrot, garden rocket, sweet pepper and okra, while the canned foods were tuna fish and tomato paste (salsa). The vegetable samples were collected at two sites, roadside market and farm. Lead concentration was relatively high in all commodities except tuna fish with highest values (38.2mg/kg and 2.47mg/kg) were recorded in tomato paste and carrot collected from farm respectively, and the lowest values (0.38mg/kg and 0.33mg/kg) were found in garden rocket collected from roadside market and okra from farm respectively, while lead was undetectable in tuna fish. Yet the level of lead detected exceeded the maximum level (0.3mg/kg) accepted by FAO/WHO-Codex. The maximum levels of cadmium were detected in garden rocket collected from the farm (1.08mg/kg) and the minimum level (0.0017mg/kg) was obtained in tuna fish. The cadmium levels in all samples except garden rocket from both roadside market and farm were below the accepted maximum level (0.2mg/kg) of FAO/WHO-Codex. Nickel and copper concentration for all vegetables and canned foods studied were below the accepted maximum level which is 67.90mg/kg for nickel and 73.3mg/kg for copper stated by FAO/WHO-Codex. The highest level of arsenic (9.68mg/kg) was observed in carrot collected from the farm and the lowest level (0.01mg/kg) was observed in tuna fish. The arsenic concentration in all samples except tuna fish was above the accepted maximum level (0.05mg/kg) by FAO/WHO-Codex. Garden rocket was found to contain the highest amount (143.83mg/100g) of phytic acid and the minimum amount (81.24mg/100g) was observed in carrot. The highest amount of tannins (0.419%) was observed in tomato and the lowest content (0.028%) was observed in carrot.
URI: http://khartoumspace.uofk.edu/handle/123456789/13017
Date: 2015-06-16


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