Effect of supporting electrolytes on voltammetry with manual staircase voltage scan

Detalhes bibliográficos
Autor(a) principal: Arce-Castro, Jorge
Data de Publicação: 2022
Outros Autores: Vilasó-Cadre, Javier E., Benítez-Fernández, Daniel, Rodríguez-de la Rosa, Héctor, Arada-Pérez, María A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: The Journal of Engineering and Exact Sciences
Texto Completo: https://periodicos.ufv.br/jcec/article/view/14235
Resumo: The minimal instrumentation voltammetry with manual staircase voltage scan allows to obtain electrochemical results with non-commercial equipment. Several researches have demonstrated its analytical and metrological validity; however, some variables have not been studied in this kind of methods, such as the effect of the supporting electrolyte on the repeatability of the voltammograms. In this paper, a study is presented about the effect of KNO3, KCl, KClO4, K2SO4 and Na2SO3 as supporting electrolytes on the voltammograms obtained for the oxidation of KI and succinic acid, both at 0,1 mol/L; ascorbic acid 0,01 mol/L and potassium hexacyanoferrate (II) 0,08 mol/L, all of them as an analytical model. A graphite microdisc was used as working electrode; a bar of the same material was used as the auxiliary electrode. A silver electrode was used as the reference electrode. The Analysis of Variance was the statistical tool for the comparison of the voltammetric currents. A Multiple Range Contrast by a Fisher's LSD Test was used to identify the groups with statistical differences. There were statistical differences between the currents obtained with different supporting electrolytes for all the electroactive species studied. The best voltammetric results were obtained using KCl and KNO3 as supporting electrolytes.
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spelling Effect of supporting electrolytes on voltammetry with manual staircase voltage scanEfecto de los electrolitos soporte en la voltamperometría con barrido manual de escaleraEfeito de eletrólitos de suporte na voltametria com varredura manual de tensão em escadaSupporting electrolyteVoltammetryGraphiteNon-commercial instrumentationEletrólito de suporteVoltametriaGrafiteInstrumentação não comercialElectrolito soporteVoltamperometríaGrafitoInstrumentación no comercialThe minimal instrumentation voltammetry with manual staircase voltage scan allows to obtain electrochemical results with non-commercial equipment. Several researches have demonstrated its analytical and metrological validity; however, some variables have not been studied in this kind of methods, such as the effect of the supporting electrolyte on the repeatability of the voltammograms. In this paper, a study is presented about the effect of KNO3, KCl, KClO4, K2SO4 and Na2SO3 as supporting electrolytes on the voltammograms obtained for the oxidation of KI and succinic acid, both at 0,1 mol/L; ascorbic acid 0,01 mol/L and potassium hexacyanoferrate (II) 0,08 mol/L, all of them as an analytical model. A graphite microdisc was used as working electrode; a bar of the same material was used as the auxiliary electrode. A silver electrode was used as the reference electrode. The Analysis of Variance was the statistical tool for the comparison of the voltammetric currents. A Multiple Range Contrast by a Fisher's LSD Test was used to identify the groups with statistical differences. There were statistical differences between the currents obtained with different supporting electrolytes for all the electroactive species studied. The best voltammetric results were obtained using KCl and KNO3 as supporting electrolytes.La voltamperometría de mínima instrumentación con barrido manual de escalera permite obtener resultados electroquímicos con equipamiento no comercial. Varios estudios han demostrado su validez analítica y metrológica; sin embargo, algunas variables en estos métodos no han sido estudiadas, tal como el efecto del electrolito soporte sobre la repetibilidad de los voltamperogramas. En este trabajo, se realizó un estudio del efecto de KNO3, KCl, KClO4, K2SO4 y Na2SO3 como electrolitos soporte en los voltamperogramas de barrido manual de escalera obtenidos para la oxidación del KI y ácido succínico, ambos a 0.1 mol/L; ácido ascórbico 0.01 mol/L y hexacianoferrato (II) de potasio 0.08 mol/L. Se empleó un microdisco de grafito como electrodo de trabajo y como auxiliar una barra del mismo material. El electrodo de referencia fue de plata. El Análisis de Varianza fue la herramienta estadística para la comparación de las corrientes voltamperométricas. Un Contraste Múltiple de Rangos mediante una prueba LSD de Fisher fue utilizado para identificar los grupos con diferencias estadísticas. Existieron diferencias estadísticamente significativas entre las corrientes correspondientes a los diferentes electrólitos soporte para todas las especies electroactivas estudiadas. Los mejores resultados voltamperométricos se obtuvieron utilizando KCl y KNO3 como electrolitos soporte.A voltametria mínima da instrumentação com varredura manual da tensão da escada permite obter resultados eletroquímicos com equipamento não-comercial. Várias pesquisas demonstraram a sua validade analítica e metrológica; contudo, algumas variáveis não foram estudadas neste tipo de métodos, tais como o efeito do eletrólito de suporte na repetibilidade dos voltamogramas. Neste artigo, é apresentado um estudo sobre o efeito do KNO3, KCl, KClO4, K2SO4 e Na2SO3 como eletrólitos de suporte nos voltamogramas obtidos para a oxidação do KI e ácido succínico, ambos a 0.1 mol/L; ácido ascórbico 0.01 mol/L e hexacianoferrato de potássio (II) 0.08 mol/L, todos eles como modelo analítico. Foi utilizado um microdisco de grafite como eléctrodo de trabalho; uma barra do mesmo material foi utilizada como eléctrodo auxiliar. Como eléctrodo de referência foi utilizado um eléctrodo de prata. A Análise de Variância foi a ferramenta estatística para a comparação das correntes voltamétricas. Foi utilizado um Contraste de Gama Múltipla por um Teste de Fisher LSD para identificar os grupos com diferenças estatísticas. Havia diferenças estatísticas entre as correntes obtidas com diferentes eletrólitos de suporte para todas as espécies eletroativas estudadas. Os melhores resultados voltamétricos foram obtidos utilizando KCl e KNO3 como eletrólitos de suporte.Universidade Federal de Viçosa - UFV2022-05-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/jcec/article/view/1423510.18540/jcecvl8iss3pp14235-01eThe Journal of Engineering and Exact Sciences; Vol. 8 No. 3 (2022); 14235-01eThe Journal of Engineering and Exact Sciences; Vol. 8 Núm. 3 (2022); 14235-01eThe Journal of Engineering and Exact Sciences; v. 8 n. 3 (2022); 14235-01e2527-1075reponame:The Journal of Engineering and Exact Sciencesinstname:Universidade Federal de Viçosa (UFV)instacron:UFVenghttps://periodicos.ufv.br/jcec/article/view/14235/7315Copyright (c) 2022 The Journal of Engineering and Exact Scienceshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessArce-Castro, JorgeVilasó-Cadre, Javier E.Benítez-Fernández, DanielRodríguez-de la Rosa, HéctorArada-Pérez, María A.2022-06-29T13:37:54Zoai:ojs.periodicos.ufv.br:article/14235Revistahttp://www.seer.ufv.br/seer/rbeq2/index.php/req2/oai2527-10752527-1075opendoar:2022-06-29T13:37:54The Journal of Engineering and Exact Sciences - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
Efecto de los electrolitos soporte en la voltamperometría con barrido manual de escalera
Efeito de eletrólitos de suporte na voltametria com varredura manual de tensão em escada
title Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
spellingShingle Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
Arce-Castro, Jorge
Supporting electrolyte
Voltammetry
Graphite
Non-commercial instrumentation
Eletrólito de suporte
Voltametria
Grafite
Instrumentação não comercial
Electrolito soporte
Voltamperometría
Grafito
Instrumentación no comercial
title_short Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
title_full Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
title_fullStr Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
title_full_unstemmed Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
title_sort Effect of supporting electrolytes on voltammetry with manual staircase voltage scan
author Arce-Castro, Jorge
author_facet Arce-Castro, Jorge
Vilasó-Cadre, Javier E.
Benítez-Fernández, Daniel
Rodríguez-de la Rosa, Héctor
Arada-Pérez, María A.
author_role author
author2 Vilasó-Cadre, Javier E.
Benítez-Fernández, Daniel
Rodríguez-de la Rosa, Héctor
Arada-Pérez, María A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Arce-Castro, Jorge
Vilasó-Cadre, Javier E.
Benítez-Fernández, Daniel
Rodríguez-de la Rosa, Héctor
Arada-Pérez, María A.
dc.subject.por.fl_str_mv Supporting electrolyte
Voltammetry
Graphite
Non-commercial instrumentation
Eletrólito de suporte
Voltametria
Grafite
Instrumentação não comercial
Electrolito soporte
Voltamperometría
Grafito
Instrumentación no comercial
topic Supporting electrolyte
Voltammetry
Graphite
Non-commercial instrumentation
Eletrólito de suporte
Voltametria
Grafite
Instrumentação não comercial
Electrolito soporte
Voltamperometría
Grafito
Instrumentación no comercial
description The minimal instrumentation voltammetry with manual staircase voltage scan allows to obtain electrochemical results with non-commercial equipment. Several researches have demonstrated its analytical and metrological validity; however, some variables have not been studied in this kind of methods, such as the effect of the supporting electrolyte on the repeatability of the voltammograms. In this paper, a study is presented about the effect of KNO3, KCl, KClO4, K2SO4 and Na2SO3 as supporting electrolytes on the voltammograms obtained for the oxidation of KI and succinic acid, both at 0,1 mol/L; ascorbic acid 0,01 mol/L and potassium hexacyanoferrate (II) 0,08 mol/L, all of them as an analytical model. A graphite microdisc was used as working electrode; a bar of the same material was used as the auxiliary electrode. A silver electrode was used as the reference electrode. The Analysis of Variance was the statistical tool for the comparison of the voltammetric currents. A Multiple Range Contrast by a Fisher's LSD Test was used to identify the groups with statistical differences. There were statistical differences between the currents obtained with different supporting electrolytes for all the electroactive species studied. The best voltammetric results were obtained using KCl and KNO3 as supporting electrolytes.
publishDate 2022
dc.date.none.fl_str_mv 2022-05-13
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufv.br/jcec/article/view/14235
10.18540/jcecvl8iss3pp14235-01e
url https://periodicos.ufv.br/jcec/article/view/14235
identifier_str_mv 10.18540/jcecvl8iss3pp14235-01e
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://periodicos.ufv.br/jcec/article/view/14235/7315
dc.rights.driver.fl_str_mv Copyright (c) 2022 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2022 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
dc.source.none.fl_str_mv The Journal of Engineering and Exact Sciences; Vol. 8 No. 3 (2022); 14235-01e
The Journal of Engineering and Exact Sciences; Vol. 8 Núm. 3 (2022); 14235-01e
The Journal of Engineering and Exact Sciences; v. 8 n. 3 (2022); 14235-01e
2527-1075
reponame:The Journal of Engineering and Exact Sciences
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str The Journal of Engineering and Exact Sciences
collection The Journal of Engineering and Exact Sciences
repository.name.fl_str_mv The Journal of Engineering and Exact Sciences - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv
_version_ 1808845247110709248