A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.microc.2020.105292 http://hdl.handle.net/11449/200799 |
Resumo: | A method using glassy carbon electrode containing biochar, nanodiamonds and chitosan has been developed for simultaneous voltammetric quantification of cadmium and lead. The developed material was characterised by microscopy (transmission electron and scanning electron) and square-wave anodic stripping voltammetry. Using optimum conditions, the sensor exhibited excellent response for the simultaneous quantification of metal ions. High electrochemical sensitivities of 0.42 and 5.3 μA μmol−1 cm−2 was found for Cd and Pb quantification, respectively. Well separated peaks at −0.64 and −0.42 V vs. Ag/AgCl(KClsat) were obtained, as well as low limits of detection of 0.11 and 0.056 µmol L−1 and linear ranges of 1.0 to 75.0 and 0.25 to 6.0 μmol L−1 for cadmium and lead quantification, respectively. The modified GCE exhibited good repeatability, stability for 30 days and reproducibility (with a relative standard deviation between 4.6% and 4.9% for n = 5). The developed sensor presents high robustness, requiring no step cleaning of the electrode surface to remove any remaining bonded metals. An ecologically friendly, low cost and high yield electrode was therefore developed for the simultaneous determination of two toxic metals in real environmental samples applying square-wave anodic stripping voltammetry. |
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A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elementsBiocharElectrochemical sensorsEnvironmentally-friendly chemical sensorsNanodiamondsReal environmental samplesToxic metal determinationA method using glassy carbon electrode containing biochar, nanodiamonds and chitosan has been developed for simultaneous voltammetric quantification of cadmium and lead. The developed material was characterised by microscopy (transmission electron and scanning electron) and square-wave anodic stripping voltammetry. Using optimum conditions, the sensor exhibited excellent response for the simultaneous quantification of metal ions. High electrochemical sensitivities of 0.42 and 5.3 μA μmol−1 cm−2 was found for Cd and Pb quantification, respectively. Well separated peaks at −0.64 and −0.42 V vs. Ag/AgCl(KClsat) were obtained, as well as low limits of detection of 0.11 and 0.056 µmol L−1 and linear ranges of 1.0 to 75.0 and 0.25 to 6.0 μmol L−1 for cadmium and lead quantification, respectively. The modified GCE exhibited good repeatability, stability for 30 days and reproducibility (with a relative standard deviation between 4.6% and 4.9% for n = 5). The developed sensor presents high robustness, requiring no step cleaning of the electrode surface to remove any remaining bonded metals. An ecologically friendly, low cost and high yield electrode was therefore developed for the simultaneous determination of two toxic metals in real environmental samples applying square-wave anodic stripping voltammetry.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Department of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP)National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM)Institute of Chemistry Federal University of Mato Grosso do SulInstitute of Chemistry Federal University of Rio de JaneiroNational Institute of Science & Technology of Bioanalytics (INCTBio)Institute of Chemistry Federal University of UberlândiaDepartment of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP)Universidade Estadual Paulista (Unesp)Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM)Federal University of Mato Grosso do SulFederal University of Rio de JaneiroNational Institute of Science & Technology of Bioanalytics (INCTBio)Universidade Federal de Uberlândia (UFU)Wong, Ademar [UNESP]A. Ferreira, PriscilaSantos, Anderson M. [UNESP]Cincotto, Fernando H.Silva, Rodrigo A.B.Sotomayor, Maria D.P.T. [UNESP]2020-12-12T02:16:24Z2020-12-12T02:16:24Z2020-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.microc.2020.105292Microchemical Journal, v. 158.0026-265Xhttp://hdl.handle.net/11449/20079910.1016/j.microc.2020.1052922-s2.0-85088400183Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMicrochemical Journalinfo:eu-repo/semantics/openAccess2021-10-23T15:16:33Zoai:repositorio.unesp.br:11449/200799Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T15:16:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
title |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
spellingShingle |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements Wong, Ademar [UNESP] Biochar Electrochemical sensors Environmentally-friendly chemical sensors Nanodiamonds Real environmental samples Toxic metal determination |
title_short |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
title_full |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
title_fullStr |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
title_full_unstemmed |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
title_sort |
A new electrochemical sensor based on eco-friendly chemistry for the simultaneous determination of toxic trace elements |
author |
Wong, Ademar [UNESP] |
author_facet |
Wong, Ademar [UNESP] A. Ferreira, Priscila Santos, Anderson M. [UNESP] Cincotto, Fernando H. Silva, Rodrigo A.B. Sotomayor, Maria D.P.T. [UNESP] |
author_role |
author |
author2 |
A. Ferreira, Priscila Santos, Anderson M. [UNESP] Cincotto, Fernando H. Silva, Rodrigo A.B. Sotomayor, Maria D.P.T. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Federal University of Mato Grosso do Sul Federal University of Rio de Janeiro National Institute of Science & Technology of Bioanalytics (INCTBio) Universidade Federal de Uberlândia (UFU) |
dc.contributor.author.fl_str_mv |
Wong, Ademar [UNESP] A. Ferreira, Priscila Santos, Anderson M. [UNESP] Cincotto, Fernando H. Silva, Rodrigo A.B. Sotomayor, Maria D.P.T. [UNESP] |
dc.subject.por.fl_str_mv |
Biochar Electrochemical sensors Environmentally-friendly chemical sensors Nanodiamonds Real environmental samples Toxic metal determination |
topic |
Biochar Electrochemical sensors Environmentally-friendly chemical sensors Nanodiamonds Real environmental samples Toxic metal determination |
description |
A method using glassy carbon electrode containing biochar, nanodiamonds and chitosan has been developed for simultaneous voltammetric quantification of cadmium and lead. The developed material was characterised by microscopy (transmission electron and scanning electron) and square-wave anodic stripping voltammetry. Using optimum conditions, the sensor exhibited excellent response for the simultaneous quantification of metal ions. High electrochemical sensitivities of 0.42 and 5.3 μA μmol−1 cm−2 was found for Cd and Pb quantification, respectively. Well separated peaks at −0.64 and −0.42 V vs. Ag/AgCl(KClsat) were obtained, as well as low limits of detection of 0.11 and 0.056 µmol L−1 and linear ranges of 1.0 to 75.0 and 0.25 to 6.0 μmol L−1 for cadmium and lead quantification, respectively. The modified GCE exhibited good repeatability, stability for 30 days and reproducibility (with a relative standard deviation between 4.6% and 4.9% for n = 5). The developed sensor presents high robustness, requiring no step cleaning of the electrode surface to remove any remaining bonded metals. An ecologically friendly, low cost and high yield electrode was therefore developed for the simultaneous determination of two toxic metals in real environmental samples applying square-wave anodic stripping voltammetry. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:16:24Z 2020-12-12T02:16:24Z 2020-11-01 |
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/10.1016/j.microc.2020.105292 Microchemical Journal, v. 158. 0026-265X http://hdl.handle.net/11449/200799 10.1016/j.microc.2020.105292 2-s2.0-85088400183 |
url |
http://dx.doi.org/10.1016/j.microc.2020.105292 http://hdl.handle.net/11449/200799 |
identifier_str_mv |
Microchemical Journal, v. 158. 0026-265X 10.1016/j.microc.2020.105292 2-s2.0-85088400183 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Microchemical Journal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus 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_ |
1799965502067441664 |