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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/231114
Unveiling iron chemical speciation in low sample volumes by a spectroelectrochemical approach
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Spectroelectrochemistry (SEC) in the UV-vis region has shown interesting possibilities for analytical purposes, especially by means of chronoamperometric (CA) measurements in normal reflection mode using screen-printed carbon electrodes (SPCE). In this work, a study of the electrochemical and optical response of mixtures with different proportion of Fe(II)- and Fe(III)-ions complexed with ortho-phenanthroline (OP) was conducted by taking advantage of the appearance/disappearance of the intense red color of Fe(II)-OP complex as Fe(III) is reduced and Fe(II) is oxidized, respectively. As a proof of concept, the calibration curves obtained for mixtures under reduction (- 0.2 V) and oxidation (+1.0 V) conditions were used to quantify the amount of Fe(II) and Fe(III) in a real sample. The analysis showed that the SEC-based strategy is a suitable tool for iron speciation using a reduced volume of sample.
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CUTILLO‑FORASTER, Alessandra, et al. Unveiling iron chemical speciation in low sample volumes by a spectroelectrochemical approach. Talanta. 2026. Vol. 307. ISSN 0039-9140. [consulted: 6 of November of 2026]. Available at: https://hdl.handle.net/2445/231114