Polycyclic Aromatic Hydrocarbon and Metal Concentrations in Imported Canned Maize

Embbey K Ossai, Chukwujindu Maxwell Iwegbue, Elizabeth E. Ajogungbe, Godswill O Tesi


Concentrations and profile of polycyclic aromatic hydrocarbons(PAHs) and metals (Cd, Pb, Ni, Cr, Fe and Mn) were determined in selected brands of canned maize in the Nigeria market with a view to providing information on the hazards associated with the consumption of these products. The measurement of the concentrations of PAHs was carried out by using a gas chromatography equipped with flame ionization detector (GC-FID) after extraction by ultra-sonication with acetone/dichloromethane and clean-up. The 16 PAH concentrations varied between 45.1 and 335.7 µg/kg. The concentrations of the indicators for occurrence and effects of PAHs in food varied from 3.6 to 114.5 µg/kg for BaP, 6.4 to 168.2 µg/kg for PAH2, 11.8 to 232.7 µg/kg for PAH4 and 19.4 to 327.3 µg/kg for PAH8. The concentrations of metals were determined by using atomic absorption spectrometry after acid digestion. The concentrations of metals in these samples ranged from <0.05 to 0.9 µg/g for Cd; 5.0 to 8.0 µg/g for Pb, 0.8 to 1.7 µg/g for Fe while Cr and Mn were less than the limits of quantification (<0.05 µg/g). The concentrations of Cd and Pb in these canned maize samples were above their permissible limits for foods.


Polycyclic aromatic hydrocarbons; Heavy metals;Canned food; Nigeria

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DOI: https://doi.org/10.24925/turjaf.v3i1.53-58.173

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ISSN: 2148-127X

Turkish JAF Sci.Tech.

Turkish Journal of Agriculture - Food Science and Technology (TURJAF) is indexed in: