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Evaluation of a reconfigurable portable instrument for copper determination based on luminescent carbon dots

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Abstract

A portable reconfigurable platform for copper (Cu(II)) determination based on luminescent carbon dot (Cdots) quenching is described. The electronic setup consists of a light-emitting diode (LED) as the carbon dot optical exciter and a photodiode as a light-to-current converter integrated in the same instrument. Moreover, the overall analog conditioning is simply performed with one integrated solution, a field-programmable analog array (FPAA), which makes it possible to reconfigure the filter and gain stages in real time. This feature provides adaptability to use the platform as an analytical probe for carbon dots coming from different batches with some variations in luminescence characteristics. The calibration functions obtained that fit a modified Stern-Volmer equation were obtained using luminescence signals from Cdots quenching by Cu(II). The analytical applicability of the reconfigurable portable instrument for Cu(II) using Cdots has been successfully demonstrated in tap water analysis.

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Acknowledgments

This study was supported by projects from the Spanish MINECO (CTQ2013-44545-R), Junta de Andalucía (P10-FQM-5974), and the Fortalecimiento de Grupos and Reincorporación de Doctores programs. These projects were partially supported by ERDF.

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Authors and Affiliations

  1. ECsens, Department of Analytical Chemistry, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain

    Alfonso Salinas-Castillo, Alejandro Lapresta-Fernández, María Ariza-Avidad & Luis Fermin Capitan-Vallvey

  2. ECsens, Department of Electronics and Computer Technology, CITIC-ETSIIT, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain

    Diego P. Morales, Encarnación Castillo, Antonio Martínez-Olmos & Alberto J. Palma

Authors
  1. Alfonso Salinas-Castillo
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  2. Diego P. Morales
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  3. Alejandro Lapresta-Fernández
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  4. María Ariza-Avidad
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  5. Encarnación Castillo
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  6. Antonio Martínez-Olmos
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  7. Alberto J. Palma
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  8. Luis Fermin Capitan-Vallvey
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Corresponding author

Correspondence to Alfonso Salinas-Castillo.

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The authors declare that they have no competing interests.

Additional information

Published in the topical collection featuring Young Investigators in Analytical and Bioanalytical Science with guest editors S. Daunert, A. Baeumner, S. Deo, J. Ruiz Encinar, and L. Zhang.

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Salinas-Castillo, A., Morales, D.P., Lapresta-Fernández, A. et al. Evaluation of a reconfigurable portable instrument for copper determination based on luminescent carbon dots. Anal Bioanal Chem 408, 3013–3020 (2016). https://doi.org/10.1007/s00216-016-9349-7

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  • DOI: https://doi.org/10.1007/s00216-016-9349-7

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