How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor

Several electroanalytical techniques (such as Absence of Gradients and Nernstian Equilibrium Stripping, AGNES) need to quantify the amount of reduced analyte (M0) pre-concentrated in a mercury electrode. Among the used means for this quantification, Stripping ChronoPotentiometry, SCP, also known as...

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Autores: Monteiro, Adnívia S.C., Companys Ferran, Encarnació, Puy Llorens, Jaume, Galceran i Nogués, Josep
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/467508
Acceso en línea:https://doi.org/10.1016/j.jelechem.2024.118508
https://hdl.handle.net/10459.1/467508
Access Level:acceso abierto
Palabra clave:PSA
Mathematical model
HMDE
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spelling How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factorMonteiro, Adnívia S.C.Companys Ferran, EncarnacióPuy Llorens, JaumeGalceran i Nogués, JosepPSAMathematical modelHMDESeveral electroanalytical techniques (such as Absence of Gradients and Nernstian Equilibrium Stripping, AGNES) need to quantify the amount of reduced analyte (M0) pre-concentrated in a mercury electrode. Among the used means for this quantification, Stripping ChronoPotentiometry, SCP, also known as Potentiometric Stripping Analysis (PSA), yields the time (τ) during which a constant total stripping current can progressively empty M0 from the electrode. The depletion factor (fd) is defined as the fraction of the total analyte that is depleted while the attainment of the constant total stripping current is possible. Full depletion only corresponds to the limiting case fd = 1. For (hemi)spherical electrodes, an analytical expression for fd is derived, which depends on the transition time τ, the electrode radius and the diffusion coefficient (but not explicitly on the total stripping current or the total charge). The theoretical expectations have been experimentally checked here with the Hanging Mercury Drop Electrode (HMDE) and the Thin Mercury Film Rotating Disc Electrode (TMF-RDE) for zinc and indium as analyte metals. In the case of the smallest drop in HMDE, for accurate total charge determinations, it is recommended to work with transition times longer than 5 s. In HMDE drops, the direct use of short transition times as analytical signals directly proportional to the free metal ion concentrations (in AGNES) might be inaccurate. Computing the charge with the depletion factor would be essential in such cases.Support from the Spanish Ministry of Science and Innovation (Projects PID2019-107033GB, PID2020-117910GB-C21 and PID2022-140312NB-C21 funded by MCIN/AEI/10.13039/501100011033) and from María Zambrano scholarship to ASCM (Ministerio de Universidades, Spain, funded by the European Union-NextGenerationEU)Elsevier2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1016/j.jelechem.2024.118508https://hdl.handle.net/10459.1/467508reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21nfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117910GB-C21/ES/EL PAPEL DE LA MATERIA ORGANICA DISUELTA TERRESTRE, FLUVIAL Y MARINA EN EL ENLACE, TRANSPORTE Y BIODISPONIBILIDAD DE NUTRIENTES%2FCONTAMINANTES CLAVE./info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-140312NB-C21Reproducció del document publicat a https://doi.org/10.1016/j.jelechem.2024.118508Journal of Electroanalytical Chemistry, 2024, vol. 969, 118508cc-by (c) Adnívia S.C. Monteiro et al., 2024Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:recercat.cat:10459.1/4675082026-05-29T05:05:01Z
dc.title.none.fl_str_mv How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
title How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
spellingShingle How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
Monteiro, Adnívia S.C.
PSA
Mathematical model
HMDE
title_short How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
title_full How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
title_fullStr How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
title_full_unstemmed How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
title_sort How much analyte is removed from the electrode in Stripping ChronoPotentiometry? The depletion factor
dc.creator.none.fl_str_mv Monteiro, Adnívia S.C.
Companys Ferran, Encarnació
Puy Llorens, Jaume
Galceran i Nogués, Josep
author Monteiro, Adnívia S.C.
author_facet Monteiro, Adnívia S.C.
Companys Ferran, Encarnació
Puy Llorens, Jaume
Galceran i Nogués, Josep
author_role author
author2 Companys Ferran, Encarnació
Puy Llorens, Jaume
Galceran i Nogués, Josep
author2_role author
author
author
dc.subject.none.fl_str_mv PSA
Mathematical model
HMDE
topic PSA
Mathematical model
HMDE
description Several electroanalytical techniques (such as Absence of Gradients and Nernstian Equilibrium Stripping, AGNES) need to quantify the amount of reduced analyte (M0) pre-concentrated in a mercury electrode. Among the used means for this quantification, Stripping ChronoPotentiometry, SCP, also known as Potentiometric Stripping Analysis (PSA), yields the time (τ) during which a constant total stripping current can progressively empty M0 from the electrode. The depletion factor (fd) is defined as the fraction of the total analyte that is depleted while the attainment of the constant total stripping current is possible. Full depletion only corresponds to the limiting case fd = 1. For (hemi)spherical electrodes, an analytical expression for fd is derived, which depends on the transition time τ, the electrode radius and the diffusion coefficient (but not explicitly on the total stripping current or the total charge). The theoretical expectations have been experimentally checked here with the Hanging Mercury Drop Electrode (HMDE) and the Thin Mercury Film Rotating Disc Electrode (TMF-RDE) for zinc and indium as analyte metals. In the case of the smallest drop in HMDE, for accurate total charge determinations, it is recommended to work with transition times longer than 5 s. In HMDE drops, the direct use of short transition times as analytical signals directly proportional to the free metal ion concentrations (in AGNES) might be inaccurate. Computing the charge with the depletion factor would be essential in such cases.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.jelechem.2024.118508
https://hdl.handle.net/10459.1/467508
url https://doi.org/10.1016/j.jelechem.2024.118508
https://hdl.handle.net/10459.1/467508
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21
nfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117910GB-C21/ES/EL PAPEL DE LA MATERIA ORGANICA DISUELTA TERRESTRE, FLUVIAL Y MARINA EN EL ENLACE, TRANSPORTE Y BIODISPONIBILIDAD DE NUTRIENTES%2FCONTAMINANTES CLAVE./
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-140312NB-C21
Reproducció del document publicat a https://doi.org/10.1016/j.jelechem.2024.118508
Journal of Electroanalytical Chemistry, 2024, vol. 969, 118508
dc.rights.none.fl_str_mv cc-by (c) Adnívia S.C. Monteiro et al., 2024
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Adnívia S.C. Monteiro et al., 2024
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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