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A new method for optimising polarisation point in electrochemical impedance based measurements

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Abstract

In this work, we show a new procedure to obtain an optimum DC polarisation potential that allows achieving the maximum possible sensitivity for analyte determination, when electrochemical techniques are used. This is valid whether purely DC or AC potentials are used for system polarisation. In addition, the optimum potential is lower than the ones generally used by the classical methods, avoiding redox-active interferents and rapid degradation of the working electrode. In our case, we obtain a reduction of 16% of the DC applied potential and an increase among 3 and 5 times in the sensitivity.

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Acknowledgements

This work has been supported by Grants from Agencia Nacional de Promoción Científica y Tecnológica (ANPCYT) (PICT 2565 2016), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (PIP CONICET 112-20150100842), and Consejo de Investigaciones de la Universidad Nacional de Tucumán (CIUNT), as well as by Institutional funds from Instituto Superior de Investigaciones Biológicas (INSIBIO).

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Author notes

  1. C. J. Felice and G. A. Ruiz have contributed equally to this work.

Authors and Affiliations

  1. Laboratorio de Medios e Interfases (LAMEIN), DBI-FACET-UNT, INSIBIO-CONICET, Av. Independencia 1800, San Miguel de Tucumán, Argentina

    C. J. Felice, G. A. Ruiz, P. Nanni, R. E. Madrid, C. Goy & M. Zamora

  2. Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), CCT-Córdoba, UNVM-CONICET, San Martin, Argentina

    L. Saad

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  1. C. J. Felice
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  2. G. A. Ruiz
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  3. L. Saad
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  4. P. Nanni
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  5. R. E. Madrid
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  7. M. Zamora
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Contributions

GAR and CJF made the conceptualization, methodology, data curation, writing and supervision. LS: performed experiments and validation. PN,MZ,CG: made data validation and writing RM: Only validation

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Correspondence to G. A. Ruiz.

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Felice, C.J., Ruiz, G.A., Saad, L. et al. A new method for optimising polarisation point in electrochemical impedance based measurements. J Appl Electrochem 53, 1787–1793 (2023). https://doi.org/10.1007/s10800-023-01879-y

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