Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004 |
Resumo: | Surface modification by chitosan (CT) on a glassy carbon electrode (GCE) was employed in the present study to determine metal traces (Cu, Pb, Cd, Co, As and Pt). Previous report about the chitosan film affinity toward positive or negative species demonstrated and allowed the application of these polymeric films for detecting heavy metals in aqueous solutions. The modified surface exhibited an affinity to chelating metal ions in solution, forming complexes. Differential pulse voltammetry combined with a pre-concentrating process and standard addition method were employed for trace analysis, obtaining the detection ranges (Cu (II) from 3.99´10-6 to 3.91´10-5 mol L-1, Pb(II) from 1.99´10-6 to 1.58´10-5 mol L-1, Cd(II) from 1.59´10-5 to 6.23´10-5 mol L-1, As(IV) from 7.99´10-6 to 5.04´10-5 mol L-1, Pt(IV) from 8.19´10-6 to 3.59´10-5 mol L-1, Co(II) from 6.11´10-4 to 2.78´10-3 mol L-1), calibrations plots and relevant equations for each metal. Finally, cyclic voltammetry technique was used to characterize the polymeric surface behavior in presence of different metals and during the differential pulse voltammetric analysis. The results are described and discussed in the light of the existing literature. |
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Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodescyclic voltammetrychitosan-modified electrodesheavy metalselectrochemical sensorsSurface modification by chitosan (CT) on a glassy carbon electrode (GCE) was employed in the present study to determine metal traces (Cu, Pb, Cd, Co, As and Pt). Previous report about the chitosan film affinity toward positive or negative species demonstrated and allowed the application of these polymeric films for detecting heavy metals in aqueous solutions. The modified surface exhibited an affinity to chelating metal ions in solution, forming complexes. Differential pulse voltammetry combined with a pre-concentrating process and standard addition method were employed for trace analysis, obtaining the detection ranges (Cu (II) from 3.99´10-6 to 3.91´10-5 mol L-1, Pb(II) from 1.99´10-6 to 1.58´10-5 mol L-1, Cd(II) from 1.59´10-5 to 6.23´10-5 mol L-1, As(IV) from 7.99´10-6 to 5.04´10-5 mol L-1, Pt(IV) from 8.19´10-6 to 3.59´10-5 mol L-1, Co(II) from 6.11´10-4 to 2.78´10-3 mol L-1), calibrations plots and relevant equations for each metal. Finally, cyclic voltammetry technique was used to characterize the polymeric surface behavior in presence of different metals and during the differential pulse voltammetric analysis. The results are described and discussed in the light of the existing literature.Sociedade Portuguesa de Electroquímica2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004Portugaliae Electrochimica Acta v.28 n.1 2010reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004Martínez-Huitle,C.A.Fernandes,N. SuelyCerro-Lopez,M.Quiroz,M.A.info:eu-repo/semantics/openAccess2023-07-27T12:23:24ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
title |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
spellingShingle |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes Martínez-Huitle,C.A. cyclic voltammetry chitosan-modified electrodes heavy metals electrochemical sensors |
title_short |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
title_full |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
title_fullStr |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
title_full_unstemmed |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
title_sort |
Determination of Trace Metals by Differential Pulse Voltammetry at Chitosan Modified Electrodes |
author |
Martínez-Huitle,C.A. |
author_facet |
Martínez-Huitle,C.A. Fernandes,N. Suely Cerro-Lopez,M. Quiroz,M.A. |
author_role |
author |
author2 |
Fernandes,N. Suely Cerro-Lopez,M. Quiroz,M.A. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Martínez-Huitle,C.A. Fernandes,N. Suely Cerro-Lopez,M. Quiroz,M.A. |
dc.subject.por.fl_str_mv |
cyclic voltammetry chitosan-modified electrodes heavy metals electrochemical sensors |
topic |
cyclic voltammetry chitosan-modified electrodes heavy metals electrochemical sensors |
description |
Surface modification by chitosan (CT) on a glassy carbon electrode (GCE) was employed in the present study to determine metal traces (Cu, Pb, Cd, Co, As and Pt). Previous report about the chitosan film affinity toward positive or negative species demonstrated and allowed the application of these polymeric films for detecting heavy metals in aqueous solutions. The modified surface exhibited an affinity to chelating metal ions in solution, forming complexes. Differential pulse voltammetry combined with a pre-concentrating process and standard addition method were employed for trace analysis, obtaining the detection ranges (Cu (II) from 3.99´10-6 to 3.91´10-5 mol L-1, Pb(II) from 1.99´10-6 to 1.58´10-5 mol L-1, Cd(II) from 1.59´10-5 to 6.23´10-5 mol L-1, As(IV) from 7.99´10-6 to 5.04´10-5 mol L-1, Pt(IV) from 8.19´10-6 to 3.59´10-5 mol L-1, Co(II) from 6.11´10-4 to 2.78´10-3 mol L-1), calibrations plots and relevant equations for each metal. Finally, cyclic voltammetry technique was used to characterize the polymeric surface behavior in presence of different metals and during the differential pulse voltammetric analysis. The results are described and discussed in the light of the existing literature. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 |
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://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000100004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Portuguesa de Electroquímica |
publisher.none.fl_str_mv |
Sociedade Portuguesa de Electroquímica |
dc.source.none.fl_str_mv |
Portugaliae Electrochimica Acta v.28 n.1 2010 reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1777304406744629248 |