Screen-printed carbon electrode modified with poly-L-histidine applied to gold(III) determination
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
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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Journal of the Brazilian Chemical Society (Online) |
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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 |
_version_ |
1750318169440911360 |