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Title: | Considerations on the use of spectroelectrochemistry in reflection mode for quantitative analysis: Study of the Fe(III)/Fe(II) - orthophenanthroline system |
Author: | Ustabasi, Gul S. Bastos-Arrieta, Julio Pérez Ràfols, Clara Serrano i Plana, Núria Díaz Cruz, José Manuel |
Keywords: | Ferro Voltametria Electroquímica Iron Voltammetry Electrochemistry |
Issue Date: | 1-Oct-2022 |
Publisher: | Elsevier B.V. |
Abstract: | Theoretical and experimental considerations are made about possible analytical applications of spectroelectrochemistry (SEC) in reflection mode using screen-printed electrodes. The system Fe(III)/Fe(II) - orthophenanthroline is taken as a model of electrochemical generation and consumption of a substance that is strongly absorbing: the Fe(II) - orthophenanthroline complex. Different possibilities of quantification are discussed, including cathodic and anodic peaks in cyclic voltammetry and both electrochemical and optical signals acquired in chronoamperometric experiments. Among these, the evolution of absorbance with the square root of time at a constant potential has shown interesting possibilities for the determination of Fe(III)-ion at micromolar level (LOD = 2 10-6 mol L-1). Moreover, this method appears to be resistant to the presence of other electroactive species such as Cu(II)-ions. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.microc.2022.107678 |
It is part of: | Microchemical Journal, 2022, vol. 181, p. 107678 |
URI: | http://hdl.handle.net/2445/189555 |
Related resource: | https://doi.org/10.1016/j.microc.2022.107678 |
ISSN: | 0026-265X |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) Articles publicats en revistes (Institut de Recerca de l'Aigua (IdRA)) |
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