The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration

AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) determination of free Zn(II) in a solution can be affected by the reaching of high Zn° concentrations inside the amalgam. At concentrations about the solubility limit of Zn° in mercury, the formation of dendrites and powders around the...

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Autores: Galceran i Nogués, Josep, Chito Trujillo, Diana Maria, Martínez-Micaelo, Neus, Companys Ferran, Encarnació, David, Calin, Puy Llorens, Jaume
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2010
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/48907
Acceso en línea:https://doi.org/10.1016/j.jelechem.2009.10.008
http://hdl.handle.net/10459.1/48907
Access Level:acceso abierto
Palabra clave:Zinc
Electroquímica
Electrochemistry
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spelling The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentrationGalceran i Nogués, JosepChito Trujillo, Diana MariaMartínez-Micaelo, NeusCompanys Ferran, EncarnacióDavid, CalinPuy Llorens, JaumeZincElectroquímicaZincElectrochemistryAGNES (Absence of Gradients and Nernstian Equilibrium Stripping) determination of free Zn(II) in a solution can be affected by the reaching of high Zn° concentrations inside the amalgam. At concentrations about the solubility limit of Zn° in mercury, the formation of dendrites and powders around the mercury surface can be seen with an optical microscope. At concentrations of Zn° quite below the solubility limit, an anomalous stripping current appears which increases with decreasing supporting electrolyte concentration. The current along the stripping time exhibits a convex shape, which is labelled here as "anomalous convex behaviour" (acb). The origin of acb is tentatively ascribed to different kinetic reasons (amongst which the electroneutrality limitation due to low ionic strength outstands), but more than one cause is necessary for a full account of the experimental observations. With various strategies, like monitoring the charge as response function or by application of lower gains, AGNES can successfully probe these high concentrations.Elsevier2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1016/j.jelechem.2009.10.008http://hdl.handle.net/10459.1/48907reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.jelechem.2009.10.008Journal of Electroanalytical Chemistry, 2010, vol. 638, num. 1, p. 131-142(c) Elsevier, 2010info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/489072026-06-24T12:42:17Z
dc.title.none.fl_str_mv The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
title The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
spellingShingle The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
Galceran i Nogués, Josep
Zinc
Electroquímica
Zinc
Electrochemistry
title_short The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
title_full The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
title_fullStr The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
title_full_unstemmed The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
title_sort The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration
dc.creator.none.fl_str_mv Galceran i Nogués, Josep
Chito Trujillo, Diana Maria
Martínez-Micaelo, Neus
Companys Ferran, Encarnació
David, Calin
Puy Llorens, Jaume
author Galceran i Nogués, Josep
author_facet Galceran i Nogués, Josep
Chito Trujillo, Diana Maria
Martínez-Micaelo, Neus
Companys Ferran, Encarnació
David, Calin
Puy Llorens, Jaume
author_role author
author2 Chito Trujillo, Diana Maria
Martínez-Micaelo, Neus
Companys Ferran, Encarnació
David, Calin
Puy Llorens, Jaume
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Zinc
Electroquímica
Zinc
Electrochemistry
topic Zinc
Electroquímica
Zinc
Electrochemistry
description AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) determination of free Zn(II) in a solution can be affected by the reaching of high Zn° concentrations inside the amalgam. At concentrations about the solubility limit of Zn° in mercury, the formation of dendrites and powders around the mercury surface can be seen with an optical microscope. At concentrations of Zn° quite below the solubility limit, an anomalous stripping current appears which increases with decreasing supporting electrolyte concentration. The current along the stripping time exhibits a convex shape, which is labelled here as "anomalous convex behaviour" (acb). The origin of acb is tentatively ascribed to different kinetic reasons (amongst which the electroneutrality limitation due to low ionic strength outstands), but more than one cause is necessary for a full account of the experimental observations. With various strategies, like monitoring the charge as response function or by application of lower gains, AGNES can successfully probe these high concentrations.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.jelechem.2009.10.008
http://hdl.handle.net/10459.1/48907
url https://doi.org/10.1016/j.jelechem.2009.10.008
http://hdl.handle.net/10459.1/48907
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.jelechem.2009.10.008
Journal of Electroanalytical Chemistry, 2010, vol. 638, num. 1, p. 131-142
dc.rights.none.fl_str_mv (c) Elsevier, 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier, 2010
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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