Abstract
Elemental concentrations in breakfast cereals consumed in Mexico were measured using Particle induced X-ray emission with 1.7 MeV protons and X-ray fluorescence with a Rh X-ray tube operating at 35 kV. The specimens, obtained from packages purchased in markets, were freeze dried, ground and pelletized. Standardization was done with tomato, spinach, peach, and orchid leaves NIST standard reference materials, and analytical accuracy verified with NIST 3233 standard reference material (fortified cereal). The concentrations of nine elements did not agree with values quoted in the packages. Therefore, there may be inaccurate official estimations of Mexican population nutrient intakes.
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Acknowledgements
The authors thank the technical support of L. Martínez-Arellano (bibliographic search), G. Rayo and C. Valencia (Van de Graaff accelerator maintenance and operation). Work supported in part by CONACyT (Grant 253051) and DGAPA-UNAM (Grant IN-102615).
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Romero-Dávila, E., Miranda, J., de Lucio, O.G. et al. PIXE and XRF elemental analysis of breakfast cereals consumed in Mexico. J Radioanal Nucl Chem 318, 887–895 (2018). https://doi.org/10.1007/s10967-018-6052-5
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DOI: https://doi.org/10.1007/s10967-018-6052-5