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Comparison of various bismuth film electrodes in simultaneous electrochemical detection of heavy metals for application in quantum dot-linked immunoassays

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Abstract

Various electrode materials commonly used in electroanalysis were tested in preparation of respective bismuth film electrodes and compared in simultaneous electrochemical detection of heavy metals, simulating dissolved quantum dots used as labels of antibodies in quantum dot-linked immunosorbent assays. According to results obtained during voltammetric measurements, it can be concluded that selected commercial screen-printed electrodes showed many significant drawbacks which are described in detail. Contrary to the gold disk electrode, conventional glassy carbon electrode coated with thin bismuth film was applicable up to −1.5 V without the need to use very high content of bismuth in supporting electrolyte. Moreover, significant interactions among present metals were observed during their electrochemical stripping analysis, especially in presence of copper and silver.

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Acknowledgements

The supports received from the Czech Science Foundation (Project No. 15-16549S) and the Faculty of Chemical Technology, University of Pardubice (Project No. SGS-2016-001) are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic

    Milan Sýs, Radovan Metelka, Helena Pokorná & Ivan Švancara

  2. Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic

    Lucie Korecká

Authors
  1. Milan Sýs
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  2. Radovan Metelka
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  3. Lucie Korecká
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  4. Helena Pokorná
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  5. Ivan Švancara
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Correspondence to Radovan Metelka.

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Sýs, M., Metelka, R., Korecká, L. et al. Comparison of various bismuth film electrodes in simultaneous electrochemical detection of heavy metals for application in quantum dot-linked immunoassays. Monatsh Chem 148, 505–510 (2017). https://doi.org/10.1007/s00706-016-1901-9

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  • DOI: https://doi.org/10.1007/s00706-016-1901-9

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