Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination

Detalhes bibliográficos
Autor(a) principal: Bergamini,Márcio F.
Data de Publicação: 2009
Outros Autores: Santos,Daniela P., Zanoni,Maria Valnice B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100017
Resumo: A sensitive voltammetric method for trace measurements of gold(III) ions using a screen-printed carbon electrode modified with poly-L-histidine is described. The new procedure is based on the accumulation of the tetrachloroaurates complex at the electrode surface under an open circuit potential condition, followed by a cathodic stripping scan of potential. Parameters such as film preparation, pH, accumulation potential and deposition time have been optimized to obtain the best voltammetric response. Using optimal experimental conditions, analytical curves for gold ions were obtained using a linear sweep (LSV), differential pulse (DPV), and square wave voltammetry (SWV). Limits of detection of 6.0 × 10-6 mol L-1, 1.7 × 10-6 mol L-1 and 4.0 × 10-6 mol L-1 were estimated for the LSV, DPV and SWV, respectively. The method was successfully applied to the determination of gold ions in human urine samples.
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spelling Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determinationscreen-printed electrodepoly-L-histidinegold ionsstripping voltammetryA sensitive voltammetric method for trace measurements of gold(III) ions using a screen-printed carbon electrode modified with poly-L-histidine is described. The new procedure is based on the accumulation of the tetrachloroaurates complex at the electrode surface under an open circuit potential condition, followed by a cathodic stripping scan of potential. Parameters such as film preparation, pH, accumulation potential and deposition time have been optimized to obtain the best voltammetric response. Using optimal experimental conditions, analytical curves for gold ions were obtained using a linear sweep (LSV), differential pulse (DPV), and square wave voltammetry (SWV). Limits of detection of 6.0 × 10-6 mol L-1, 1.7 × 10-6 mol L-1 and 4.0 × 10-6 mol L-1 were estimated for the LSV, DPV and SWV, respectively. The method was successfully applied to the determination of gold ions in human urine samples.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100017Journal of the Brazilian Chemical Society v.20 n.1 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000100017info:eu-repo/semantics/openAccessBergamini,Márcio F.Santos,Daniela P.Zanoni,Maria Valnice B.eng2009-01-15T00:00:00Zoai:scielo:S0103-50532009000100017Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-01-15T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
title Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
spellingShingle Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
Bergamini,Márcio F.
screen-printed electrode
poly-L-histidine
gold ions
stripping voltammetry
title_short Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
title_full Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
title_fullStr Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
title_full_unstemmed Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
title_sort Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
author Bergamini,Márcio F.
author_facet Bergamini,Márcio F.
Santos,Daniela P.
Zanoni,Maria Valnice B.
author_role author
author2 Santos,Daniela P.
Zanoni,Maria Valnice B.
author2_role author
author
dc.contributor.author.fl_str_mv Bergamini,Márcio F.
Santos,Daniela P.
Zanoni,Maria Valnice B.
dc.subject.por.fl_str_mv screen-printed electrode
poly-L-histidine
gold ions
stripping voltammetry
topic screen-printed electrode
poly-L-histidine
gold ions
stripping voltammetry
description A sensitive voltammetric method for trace measurements of gold(III) ions using a screen-printed carbon electrode modified with poly-L-histidine is described. The new procedure is based on the accumulation of the tetrachloroaurates complex at the electrode surface under an open circuit potential condition, followed by a cathodic stripping scan of potential. Parameters such as film preparation, pH, accumulation potential and deposition time have been optimized to obtain the best voltammetric response. Using optimal experimental conditions, analytical curves for gold ions were obtained using a linear sweep (LSV), differential pulse (DPV), and square wave voltammetry (SWV). Limits of detection of 6.0 × 10-6 mol L-1, 1.7 × 10-6 mol L-1 and 4.0 × 10-6 mol L-1 were estimated for the LSV, DPV and SWV, respectively. The method was successfully applied to the determination of gold ions in human urine samples.
publishDate 2009
dc.date.none.fl_str_mv 2009-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100017
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532009000100017
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 Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.20 n.1 2009
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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