Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3390/chemosensors3010022 http://hdl.handle.net/11449/161302 |
Resumo: | The present work describes the development of a voltammetric sensor for the selective determination of Acid Green 25 (AG25) hair dye, widely used in commercial temporary hair dyes. The method is based on a glassy carbon electrode modified with multiwalled carbon nanotubes activated in the presence of sulfuric acid, where the anthraquinone group present as a chromophore in the dye molecule is reduced at -0.44 V vs. Ag/AgCl in a reversible process involving two electrons in Britton-Robinson (B-R) buffer solution at pH 4.0. Analytical curves were obtained using square wave voltammetry in the range from 1.0 x 10(-7) to 7.0 x 10(-6) molL(-1), achieving a detection limit of 2.7 x 10(-9) molL(-1). The voltammograms recorded for the Acid Black 1 (AB1) dye showed that the azo groups of the dye were reduced on the carbon nanotube-modified electrode (CNTME), presenting a pair of redox peaks at -0.27 V and -0.24 V in the reverse scan. Under these experimental conditions, both dyes could be detected in the water sample, since the AG25 dye is reduced at -0.47 V. The presence of other hair dyes bearing other chromophore groups, such as Acid Black 1, Acid Red 33 and basic blue 99, did not interfere with the method, which showed an average recovery of 96.7 +/- 3.5% (n = 5) for AG25 dye determination in the presence of all of these dyes. The method was successfully applied to tap water and wastewater samples collected from a water treatment plant. |
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Repositório Institucional da UNESP |
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Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaterstemporary hair dyevoltammetric sensorcarbon nanotubesAcid Green 25The present work describes the development of a voltammetric sensor for the selective determination of Acid Green 25 (AG25) hair dye, widely used in commercial temporary hair dyes. The method is based on a glassy carbon electrode modified with multiwalled carbon nanotubes activated in the presence of sulfuric acid, where the anthraquinone group present as a chromophore in the dye molecule is reduced at -0.44 V vs. Ag/AgCl in a reversible process involving two electrons in Britton-Robinson (B-R) buffer solution at pH 4.0. Analytical curves were obtained using square wave voltammetry in the range from 1.0 x 10(-7) to 7.0 x 10(-6) molL(-1), achieving a detection limit of 2.7 x 10(-9) molL(-1). The voltammograms recorded for the Acid Black 1 (AB1) dye showed that the azo groups of the dye were reduced on the carbon nanotube-modified electrode (CNTME), presenting a pair of redox peaks at -0.27 V and -0.24 V in the reverse scan. Under these experimental conditions, both dyes could be detected in the water sample, since the AG25 dye is reduced at -0.47 V. The presence of other hair dyes bearing other chromophore groups, such as Acid Black 1, Acid Red 33 and basic blue 99, did not interfere with the method, which showed an average recovery of 96.7 +/- 3.5% (n = 5) for AG25 dye determination in the presence of all of these dyes. The method was successfully applied to tap water and wastewater samples collected from a water treatment plant.Univ Estadual Paulista, Inst Quim Araraquara, Dept Quim Analit, UNESP, Rua Francisco Degni 55, BR-14800900 Araraquara, SP, BrazilUniv Estadual Paulista, Inst Quim Araraquara, Dept Quim Analit, UNESP, Rua Francisco Degni 55, BR-14800900 Araraquara, SP, BrazilMdpiUniversidade Estadual Paulista (Unesp)Oliveira, Ricardo de [UNESP]Hudari, Felipe [UNESP]Franco, Jefferson [UNESP]Boldrin Zanoni, Maria Valnice [UNESP]2018-11-26T16:27:57Z2018-11-26T16:27:57Z2015-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article22-35application/pdfhttp://dx.doi.org/10.3390/chemosensors3010022Chemosensors. Basel: Mdpi, v. 3, n. 1, p. 22-35, 2015.2227-9040http://hdl.handle.net/11449/16130210.3390/chemosensors3010022WOS:000371790600002WOS000371790600002.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemosensorsinfo:eu-repo/semantics/openAccess2023-11-02T06:12:45Zoai:repositorio.unesp.br:11449/161302Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:45:15.371243Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
title |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
spellingShingle |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters Oliveira, Ricardo de [UNESP] temporary hair dye voltammetric sensor carbon nanotubes Acid Green 25 |
title_short |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
title_full |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
title_fullStr |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
title_full_unstemmed |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
title_sort |
Carbon Nanotube-Based Electrochemical Sensor for the Determination of Anthraquinone Hair Dyes in Wastewaters |
author |
Oliveira, Ricardo de [UNESP] |
author_facet |
Oliveira, Ricardo de [UNESP] Hudari, Felipe [UNESP] Franco, Jefferson [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
author_role |
author |
author2 |
Hudari, Felipe [UNESP] Franco, Jefferson [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Oliveira, Ricardo de [UNESP] Hudari, Felipe [UNESP] Franco, Jefferson [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
dc.subject.por.fl_str_mv |
temporary hair dye voltammetric sensor carbon nanotubes Acid Green 25 |
topic |
temporary hair dye voltammetric sensor carbon nanotubes Acid Green 25 |
description |
The present work describes the development of a voltammetric sensor for the selective determination of Acid Green 25 (AG25) hair dye, widely used in commercial temporary hair dyes. The method is based on a glassy carbon electrode modified with multiwalled carbon nanotubes activated in the presence of sulfuric acid, where the anthraquinone group present as a chromophore in the dye molecule is reduced at -0.44 V vs. Ag/AgCl in a reversible process involving two electrons in Britton-Robinson (B-R) buffer solution at pH 4.0. Analytical curves were obtained using square wave voltammetry in the range from 1.0 x 10(-7) to 7.0 x 10(-6) molL(-1), achieving a detection limit of 2.7 x 10(-9) molL(-1). The voltammograms recorded for the Acid Black 1 (AB1) dye showed that the azo groups of the dye were reduced on the carbon nanotube-modified electrode (CNTME), presenting a pair of redox peaks at -0.27 V and -0.24 V in the reverse scan. Under these experimental conditions, both dyes could be detected in the water sample, since the AG25 dye is reduced at -0.47 V. The presence of other hair dyes bearing other chromophore groups, such as Acid Black 1, Acid Red 33 and basic blue 99, did not interfere with the method, which showed an average recovery of 96.7 +/- 3.5% (n = 5) for AG25 dye determination in the presence of all of these dyes. The method was successfully applied to tap water and wastewater samples collected from a water treatment plant. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-01 2018-11-26T16:27:57Z 2018-11-26T16:27:57Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3390/chemosensors3010022 Chemosensors. Basel: Mdpi, v. 3, n. 1, p. 22-35, 2015. 2227-9040 http://hdl.handle.net/11449/161302 10.3390/chemosensors3010022 WOS:000371790600002 WOS000371790600002.pdf |
url |
http://dx.doi.org/10.3390/chemosensors3010022 http://hdl.handle.net/11449/161302 |
identifier_str_mv |
Chemosensors. Basel: Mdpi, v. 3, n. 1, p. 22-35, 2015. 2227-9040 10.3390/chemosensors3010022 WOS:000371790600002 WOS000371790600002.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Chemosensors |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
22-35 application/pdf |
dc.publisher.none.fl_str_mv |
Mdpi |
publisher.none.fl_str_mv |
Mdpi |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128695574986752 |