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Determination of polyphenol content and colour index in wines through PEDOT-modified electrodes

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Abstract

Poly(3,4-ethylenedioxythiophene)-modified electrodes have been used for the estimation of the polyphenolic content and of the colour index of different samples of wines. Synthetic wine solutions, prepared with different amount of oenocyanins, have been analysed spectrophotometrically and electrochemically in order to find a correlation between the total polyphenolic content or colour index and the current peak. The regression curves obtained have been used as external calibration lines for the analysis of several commercial wines, ranging from white to dark red wines. In this way, a rapid estimation of the total polyphenolic content and of the colour index may be accomplished from a single voltammetric measurement. Furthermore, principal component analysis has also been used to evaluate the effect of total polyphenolic content and colour index on the whole voltammetric signals within a selected potential range, both for the synthetic solutions and for the commercial products.

Electrochemical sensors for the rapid determination of colour index and polyphenol content in wines

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Acknowledgments

The authors acknowledge financial support for this research by University of Modena and Reggio Emilia through FAR 2014 and by Fondazione di Vignola through Ricerca Scientifica e Tecnologica-2015.

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Authors and Affiliations

  1. Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Via G. Campi 103, 41125, Modena, Italy

    Laura Pigani, Cristina Rioli, Renato Seeber, Fabio Terzi & Chiara Zanardi

  2. Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, Via Amendola, 2 - Padiglione Besta, 42122, Reggio Emilia, Italy

    Giorgia Foca & Alessandro Ulrici

Authors
  1. Laura Pigani
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  2. Cristina Rioli
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  3. Giorgia Foca
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  4. Alessandro Ulrici
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  5. Renato Seeber
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  6. Fabio Terzi
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  7. Chiara Zanardi
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Correspondence to Laura Pigani.

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The authors declare that they have no conflict of interest.

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Published in the topical collection Chemical Sensing Systems with guest editors Maria Careri, Marco Giannetto, and Renato Seeber.

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Pigani, L., Rioli, C., Foca, G. et al. Determination of polyphenol content and colour index in wines through PEDOT-modified electrodes. Anal Bioanal Chem 408, 7329–7338 (2016). https://doi.org/10.1007/s00216-016-9643-4

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  • DOI: https://doi.org/10.1007/s00216-016-9643-4

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