EFFECTS OF LOCALLY MANUFACTURED GRINDING PLATE ON THE DEPOSITIONAL LEVEL OF METALLIC ELEMENTS IN DRY MILLING OF WHEAT GRAIN

Abstract

This paper “effects of locally manufactured grinding plate on the depositional level of metallic elements in dry milling of wheat grain” was carried out to identify three locally manufactured grinding plates, identify the concentration level of different metallic element deposit in ground wheat from the plates and to compare the level of concentration to the normal threshold by the FAO/WHO. The result shows that As, Cd, Hg, Cr, Mg, Mn, Mo, Cu, Zn, Fe, Pb, and Ni were found in small amount, the first plate contain 0.084mg/kg, 0.001 mg/kg, 0.015 mg/kg, 0.017 mg/kg, 0.017 mg/kg, 0.009 mg/kg, 0.017 mg/kg, 0.034 mg/kg, 0.002 mg/kg, 0.105 mg/kg, 0.01 mg/kg and 0.015mg/kg, the second plate has a concentration level of 0.021 mg/kg, 0.001 mg/kg, 0.005 mg/kg, 0.023 mg/kg, 0.032 mg/kg, 0.041 mg/kg, 0.000 mg/kg, 0.127 mg/kg, 0.061 mg/kg, 0.013 mg/kg, 0.018 mg/kg, and 0.012mg/kg and the third plate was also found to have a concentration level of 0.018 mg/kg, 0.003 mg/kg, 0.013 mg/kg, 0.01 mg/kg, 0.002 mg/kg, 0.02 mg/kg, 0.004 mg/kg, 0.006 mg/kg, 0.01 mg/kg, 0.015 mg/kg 2, 0.004 mg/kg, and 0.018 mg/kg respectively. Heavy metals like As, Cd, Hg and Cr which are hazardous to human health when consumed above recommended threshold were identified in all the three plates in small tolerable amounts as compared to the provisional tolerable weekly intake by FAO/WHO which is 0.015mg/kg, 0.003mg/kg, 0.045mg/kg and 0.05mg/kg.From the result obtained the three grinding plates are safe to use for dry milling of wheat.