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Use of pyrolyzed paper as disposable substrates for voltammetric determination of trace metals

The possibility of using pyrolyzed paper as disposable working electrodes for trace metals determination is reported for the first time. A small piece of pyrolyzed paper (0.7×0.7cm) was positioned at the bottom side of the electrochemical cell using a rubber O-ring, which defined the electrode area...

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Published in:Talanta (Oxford) 2017-04, Vol.165, p.33-38
Main Authors: Silva, Luiz André Juvêncio, da Silva, Weberson Pereira, Giuliani, Jason G., Canobre, Sheila Cristina, Garcia, Carlos D., Munoz, Rodrigo Alejandro Abarza, Richter, Eduardo Mathias
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cited_by cdi_FETCH-LOGICAL-c412t-ef4522c90eab61e44f7a17ed8cc7d76f2983aee969939f9ad7669d9eb7ba5bf33
cites cdi_FETCH-LOGICAL-c412t-ef4522c90eab61e44f7a17ed8cc7d76f2983aee969939f9ad7669d9eb7ba5bf33
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container_title Talanta (Oxford)
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creator Silva, Luiz André Juvêncio
da Silva, Weberson Pereira
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Richter, Eduardo Mathias
description The possibility of using pyrolyzed paper as disposable working electrodes for trace metals determination is reported for the first time. A small piece of pyrolyzed paper (0.7×0.7cm) was positioned at the bottom side of the electrochemical cell using a rubber O-ring, which defined the electrode area (0.48cm; 0.18cm2). A large number of electrodes can be obtained from a single piece of standard dimensions (2.5cm×7.5cm) of paper, therefore minimizing the cost per unit. The electrochemical performance of the pyrolyzed paper was demonstrated by cyclic voltammetry, electrochemical impedance spectroscopy and by the determination of Zn, Cd, and Pb by square-wave anodic stripping voltammetry. The unmodified pyrolyzed paper showed excellent performance for Pb and Cd detection (LOD =0.19 and 0.16 ppb, respectively). In the presence of Bi3+(in-situ film formation), the simultaneous determination of Zn, Cd and Pb was also possible (LOD=0.26, 0.25, and 0.39 ppb, respectively). [Display omitted] •Disposable electrodes were produced from pyrolized paper.•Pyrolized paper is used for the first time for the determination of trace metals.•Pyrolized paper has similar performance to glassy carbon as working electrode.
doi_str_mv 10.1016/j.talanta.2016.12.009
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source ScienceDirect Freedom Collection 2022-2024
subjects Cadmium
Carbon substrate
Lead
Paper electrode
Simultaneous determination
Stripping voltammetry
Zinc
title Use of pyrolyzed paper as disposable substrates for voltammetric determination of trace metals
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