Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers

Autores
Maza, Eliana María; Fernandez, Hector; Zon, María Alicia; Moressi, Marcela Beatriz
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electro-oxidation of fisetin (FIS) at gold electrodes modified with self-assembled monolayers (SAM) is studied in 15% dimethylsulfoxide + 85% phosphate buffer solutions of different pH using cyclic and square wave voltammetries. Gold electrodes were modified with 2-mercaptoethanesulfonic acid (2-MES) and 4-mercaptophenol (4-MP). Both modified electrodes were characterized by reductive desorption, electrochemical impedance spectroscopy, contact angle measurements, and by the determination of the apparent surface pKa. The FIS first oxidation peak showed an electrode process controlled by diffusion at 2-MES modified gold electrodes, while the electrode process showed a diffusion/adsorption mixed control at 4-MP modified gold electrodes. Square wave voltammetry was used to perform the FIS quantitative determination at both modified electrodes using the commercial reagent. Calibration curves were linear in the concentration range from 1 × 10− 7 to 1 × 10− 4 M and from 1 × 10− 6 to 1 × 10− 5 M for 2-MES and 4-MP SAM modified electrodes, respectively. Limits of detection for a 3:1 signal to noise ratio were 5 × 10− 8 M (14.3 ppb) and 5 × 10− 7 M (143 ppb) for 2-MES and 4-MP modified electrodes, respectively. The reproducibility and the repeatability were 2.2% and 0.5% for 2-MES SAM modified electrodes, and 1.6% and 1.3% for 4-MP SAM modified electrodes, respectively.
Fil: Maza, Eliana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Fernandez, Hector. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Zon, María Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Moressi, Marcela Beatriz. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Materia
Cyclic Voltammetry
Fisetin
Flavonoid
Self-Assembled Monolayers
Square Wave Voltammetry
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/74574
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/74574
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayersMaza, Eliana MaríaFernandez, HectorZon, María AliciaMoressi, Marcela BeatrizCyclic VoltammetryFisetinFlavonoidSelf-Assembled MonolayersSquare Wave Voltammetryhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The electro-oxidation of fisetin (FIS) at gold electrodes modified with self-assembled monolayers (SAM) is studied in 15% dimethylsulfoxide + 85% phosphate buffer solutions of different pH using cyclic and square wave voltammetries. Gold electrodes were modified with 2-mercaptoethanesulfonic acid (2-MES) and 4-mercaptophenol (4-MP). Both modified electrodes were characterized by reductive desorption, electrochemical impedance spectroscopy, contact angle measurements, and by the determination of the apparent surface pKa. The FIS first oxidation peak showed an electrode process controlled by diffusion at 2-MES modified gold electrodes, while the electrode process showed a diffusion/adsorption mixed control at 4-MP modified gold electrodes. Square wave voltammetry was used to perform the FIS quantitative determination at both modified electrodes using the commercial reagent. Calibration curves were linear in the concentration range from 1 × 10− 7 to 1 × 10− 4 M and from 1 × 10− 6 to 1 × 10− 5 M for 2-MES and 4-MP SAM modified electrodes, respectively. Limits of detection for a 3:1 signal to noise ratio were 5 × 10− 8 M (14.3 ppb) and 5 × 10− 7 M (143 ppb) for 2-MES and 4-MP modified electrodes, respectively. The reproducibility and the repeatability were 2.2% and 0.5% for 2-MES SAM modified electrodes, and 1.6% and 1.3% for 4-MP SAM modified electrodes, respectively.Fil: Maza, Eliana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Fernandez, Hector. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Zon, María Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaFil: Moressi, Marcela Beatriz. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaElsevier Science Sa2017-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/74574Maza, Eliana María; Fernandez, Hector; Zon, María Alicia; Moressi, Marcela Beatriz; Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 790; 4-2017; 1-101572-66570022-0728CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S157266571730125Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2017.02.030info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:54Zoai:ri.conicet.gov.ar:11336/74574instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:47:54.701CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
title Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
spellingShingle Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
Maza, Eliana María
Cyclic Voltammetry
Fisetin
Flavonoid
Self-Assembled Monolayers
Square Wave Voltammetry
title_short Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
title_full Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
title_fullStr Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
title_full_unstemmed Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
title_sort Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers
dc.creator.none.fl_str_mv Maza, Eliana María
Fernandez, Hector
Zon, María Alicia
Moressi, Marcela Beatriz
author Maza, Eliana María
author_facet Maza, Eliana María
Fernandez, Hector
Zon, María Alicia
Moressi, Marcela Beatriz
author_role author
author2 Fernandez, Hector
Zon, María Alicia
Moressi, Marcela Beatriz
author2_role author
author
author
dc.subject.none.fl_str_mv Cyclic Voltammetry
Fisetin
Flavonoid
Self-Assembled Monolayers
Square Wave Voltammetry
topic Cyclic Voltammetry
Fisetin
Flavonoid
Self-Assembled Monolayers
Square Wave Voltammetry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The electro-oxidation of fisetin (FIS) at gold electrodes modified with self-assembled monolayers (SAM) is studied in 15% dimethylsulfoxide + 85% phosphate buffer solutions of different pH using cyclic and square wave voltammetries. Gold electrodes were modified with 2-mercaptoethanesulfonic acid (2-MES) and 4-mercaptophenol (4-MP). Both modified electrodes were characterized by reductive desorption, electrochemical impedance spectroscopy, contact angle measurements, and by the determination of the apparent surface pKa. The FIS first oxidation peak showed an electrode process controlled by diffusion at 2-MES modified gold electrodes, while the electrode process showed a diffusion/adsorption mixed control at 4-MP modified gold electrodes. Square wave voltammetry was used to perform the FIS quantitative determination at both modified electrodes using the commercial reagent. Calibration curves were linear in the concentration range from 1 × 10− 7 to 1 × 10− 4 M and from 1 × 10− 6 to 1 × 10− 5 M for 2-MES and 4-MP SAM modified electrodes, respectively. Limits of detection for a 3:1 signal to noise ratio were 5 × 10− 8 M (14.3 ppb) and 5 × 10− 7 M (143 ppb) for 2-MES and 4-MP modified electrodes, respectively. The reproducibility and the repeatability were 2.2% and 0.5% for 2-MES SAM modified electrodes, and 1.6% and 1.3% for 4-MP SAM modified electrodes, respectively.
Fil: Maza, Eliana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Fernandez, Hector. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Zon, María Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Moressi, Marcela Beatriz. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
description The electro-oxidation of fisetin (FIS) at gold electrodes modified with self-assembled monolayers (SAM) is studied in 15% dimethylsulfoxide + 85% phosphate buffer solutions of different pH using cyclic and square wave voltammetries. Gold electrodes were modified with 2-mercaptoethanesulfonic acid (2-MES) and 4-mercaptophenol (4-MP). Both modified electrodes were characterized by reductive desorption, electrochemical impedance spectroscopy, contact angle measurements, and by the determination of the apparent surface pKa. The FIS first oxidation peak showed an electrode process controlled by diffusion at 2-MES modified gold electrodes, while the electrode process showed a diffusion/adsorption mixed control at 4-MP modified gold electrodes. Square wave voltammetry was used to perform the FIS quantitative determination at both modified electrodes using the commercial reagent. Calibration curves were linear in the concentration range from 1 × 10− 7 to 1 × 10− 4 M and from 1 × 10− 6 to 1 × 10− 5 M for 2-MES and 4-MP SAM modified electrodes, respectively. Limits of detection for a 3:1 signal to noise ratio were 5 × 10− 8 M (14.3 ppb) and 5 × 10− 7 M (143 ppb) for 2-MES and 4-MP modified electrodes, respectively. The reproducibility and the repeatability were 2.2% and 0.5% for 2-MES SAM modified electrodes, and 1.6% and 1.3% for 4-MP SAM modified electrodes, respectively.
publishDate 2017
dc.date.none.fl_str_mv 2017-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/74574
Maza, Eliana María; Fernandez, Hector; Zon, María Alicia; Moressi, Marcela Beatriz; Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 790; 4-2017; 1-10
1572-6657
0022-0728
CONICET Digital
CONICET
url http://hdl.handle.net/11336/74574
identifier_str_mv Maza, Eliana María; Fernandez, Hector; Zon, María Alicia; Moressi, Marcela Beatriz; Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 790; 4-2017; 1-10
1572-6657
0022-0728
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S157266571730125X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2017.02.030
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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