Indirect determination of iron in a flow-injection system with amperometric detection |
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Authors: | Liliana Silva R Luis E León Alfredo Calvo C |
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Institution: | Departamento de Química, Universidad Simón Bolivar, Apartado 80659, Caracas 1080-a Venezuela |
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Abstract: | The change in peak current resulting from the reaction of Fe(II) with nitroso-R salt in a flow-injection system is used to quantify Fe(II) with either single- or dual-electrode amperometric detectors. The current change varies linearly with Fe(II) concentration from 0 to 200 mg 1?1. The relative standard deviation was about 5% with the single-electrode detector and about 10% with the dual-electrode detector. The method is evaluated for the determination of iron in dietary supplements. |
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