Disposable screen-printed electrode modified with bismuth–PSS composites as high sensitive sensor for cadmium and lead determination

Maria-Hormigos, Roberto, Gismera, Mª Jesús, Procopio, Jesús R. y Sevilla, Mª Teresa . (2016) Disposable screen-printed electrode modified with bismuth–PSS composites as high sensitive sensor for cadmium and lead determination. Journal of Electroanalytical Chemistry Volume 767, 15 April 2016, Pages 114-122

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Título Disposable screen-printed electrode modified with bismuth–PSS composites as high sensitive sensor for cadmium and lead determination
Autor(es) Maria-Hormigos, Roberto
Gismera, Mª Jesús
Procopio, Jesús R.
Sevilla, Mª Teresa
Materia(s) Ciencias
Abstract Bismuth was incorporated in screen-printed carbon electrodes (SPCEs) modified with polystyrene sulfonate (PSS) and carbon nanopowder (CnP) composites. Different strategies, based on bulk approaches using bismuth oxide particles and bismuth (III) solutions, were assayed. The features of the modified electrodes were evaluated by differential pulse anodic stripping voltammetry (DPASV) of Pb(II) and Cd(II) solutions. The best results were obtained when bismuth was incorporated as bismuth oxide particles during the preparation of the PSS–CnP aqueous suspension used to modify the electrodes. Using this optimal modified sensor, the DPASV measurement conditions for Pb(II) and Cd(II) determination were optimized and their figures of merit were evaluated. Mea- surements were performed using two experimental approaches: the “drop method”, by putting the test solution on the surface of the modified SPCE, and the “immersion method” performed by immersing the device in a stirred test solution. The limits of detection (S/N = 3) were 0.27 μg L−1 (1.3 × 10−9 M) for Pb(II) and 0.10 μg L−1 (9.0 × 10−10 M) for Cd(II), using the “drop method”, and 0.029 μg L−1 (1.4 × 10−10 M) for Pb(II) and 0.012 μg L−1 (1.1 × 10−10 M) for Cd(II) employing the immersion procedure. The optimal bismuth modified SPCE was used for Pb(II) and Cd(II) determination in natural water samples with successful results.
Palabras clave Bismuth bulk modified electrodes Screen-printed electrode
Polystyrene sulfonate composites
Differential pulse anodic stripping voltammetry (DPASV)
Cd(II) and Pb(II) determination
Editor(es) Elsevier
Fecha 2016-04-15
Formato application/pdf
Identificador bibliuned:DptoCA-FCIE-Articulos-Rmaria-0007
http://e-spacio.uned.es/fez/view/bibliuned:DptoCA-FCIE-Articulos-Rmaria-0007
DOI - identifier https://doi.org/10.1016/j.jelechem.2016.02.025
ISSN - identifier 1572-6657
Nombre de la revista Journal of Electroanalytical Chemistry
Número de Volumen 767
Página inicial 114
Página final 122
Publicado en la Revista Journal of Electroanalytical Chemistry Volume 767, 15 April 2016, Pages 114-122
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Journal of Electroanalytical Chemistry, is available online at the publisher's website: Elsevier, https://doi.org/10.1016/j.jelechem.2016.02.025
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Journal of Electroanalytical Chemistry, está disponible en línea en el sitio web del editor: Elsevier, https://doi.org/10.1016/j.jelechem.2016.02.025

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Creado: Wed, 24 Jan 2024, 21:56:49 CET