Abstract
Traditional chocolate and whole-meal flour breakfast cereals were analyzed to determine the total concentrations and bioaccessibilities of some elements. For the total concentration, the samples were prepared by microwave digestion. In addition, certified reference materials were used to verify the accuracy of the method, which was 82–106% for the analytes. Great variation in the concentrations was observed, possibly due to the raw materials used to produce the cereals. For the bioaccessibility study, an in vitro digestion method was used, and the accuracy was verified by the addition and recovery method. Cu, Fe, Mn, and Zn had detectable bioaccessibilities from 37% to 47%, 1% to 41%, 8% to 61%, and 4% to 24% of the total concentrations, respectively. Aluminum, Ba, and Mo had concentrations below the limit of quantification. Therefore, breakfast cereals complement a healthy diet, since some essential elements have high bioaccessibilities.
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