Trace metal and aflatoxin concentrations in some processed cereal and root and tuber flour

Background: Sweet potato, cocoyam, water yam, maize, millet, sorghum, and rice are major staple foods in Ghana. Flour from these roots and tubers and cereals are relatively cheaper, easy to produce and can be used in the manufacturing of wide range of products, including bread, cookies, meat pies, cake, chips and doughnut. However, due to the processing techniques used these flours may be contaminated with trace metals and aflatoxins. It was therefore necessary to determine the concentration...