Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae

Detalhes bibliográficos
Autor(a) principal: Muñoz,Carolina
Data de Publicação: 2010
Outros Autores: Zúñiga,Manuel, Arancibia,Verónica
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=S0103-50532010000900013
Resumo: Cadmium concentration in an aqueous medium is quantified using an alginic acid-modified carbon paste electrode. The working electrode was prepared using a homogeneous mixture of graphite powder, alginic acid (AA) and mineral oil. Square wave anodic stripping voltammetry (SWASV) using this modified electrode showed one small well-resolved anodic wave for the oxidation of AA at -0.05 V. This signal shifts toward less positive potential and peak current increases in the presence of CdII. After optimizing the experimental conditions, the anodic peak current of CdII-AA was linearly related to its concentration up to ca. 30.0 µg L-1, with a detection limit of 0.9 µg L-1 at pH 2.0 (HNO3. t acc = 60 s, Eacc = -0.80 V). The method was validated by determining CdII in spiked synthetic sea water (ASTM D665). The modified electrode showed good stability and repeatability.
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spelling Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algaealginic acidcarbon paste electrodecadmiumSWASVCadmium concentration in an aqueous medium is quantified using an alginic acid-modified carbon paste electrode. The working electrode was prepared using a homogeneous mixture of graphite powder, alginic acid (AA) and mineral oil. Square wave anodic stripping voltammetry (SWASV) using this modified electrode showed one small well-resolved anodic wave for the oxidation of AA at -0.05 V. This signal shifts toward less positive potential and peak current increases in the presence of CdII. After optimizing the experimental conditions, the anodic peak current of CdII-AA was linearly related to its concentration up to ca. 30.0 µg L-1, with a detection limit of 0.9 µg L-1 at pH 2.0 (HNO3. t acc = 60 s, Eacc = -0.80 V). The method was validated by determining CdII in spiked synthetic sea water (ASTM D665). The modified electrode showed good stability and repeatability.Sociedade Brasileira de Química2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000900013Journal of the Brazilian Chemical Society v.21 n.9 2010reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532010000900013info:eu-repo/semantics/openAccessMuñoz,CarolinaZúñiga,ManuelArancibia,Verónicaeng2010-09-10T00:00:00Zoai:scielo:S0103-50532010000900013Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2010-09-10T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
title Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
spellingShingle Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
Muñoz,Carolina
alginic acid
carbon paste electrode
cadmium
SWASV
title_short Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
title_full Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
title_fullStr Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
title_full_unstemmed Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
title_sort Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
author Muñoz,Carolina
author_facet Muñoz,Carolina
Zúñiga,Manuel
Arancibia,Verónica
author_role author
author2 Zúñiga,Manuel
Arancibia,Verónica
author2_role author
author
dc.contributor.author.fl_str_mv Muñoz,Carolina
Zúñiga,Manuel
Arancibia,Verónica
dc.subject.por.fl_str_mv alginic acid
carbon paste electrode
cadmium
SWASV
topic alginic acid
carbon paste electrode
cadmium
SWASV
description Cadmium concentration in an aqueous medium is quantified using an alginic acid-modified carbon paste electrode. The working electrode was prepared using a homogeneous mixture of graphite powder, alginic acid (AA) and mineral oil. Square wave anodic stripping voltammetry (SWASV) using this modified electrode showed one small well-resolved anodic wave for the oxidation of AA at -0.05 V. This signal shifts toward less positive potential and peak current increases in the presence of CdII. After optimizing the experimental conditions, the anodic peak current of CdII-AA was linearly related to its concentration up to ca. 30.0 µg L-1, with a detection limit of 0.9 µg L-1 at pH 2.0 (HNO3. t acc = 60 s, Eacc = -0.80 V). The method was validated by determining CdII in spiked synthetic sea water (ASTM D665). The modified electrode showed good stability and repeatability.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
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=S0103-50532010000900013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000900013
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532010000900013
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.21 n.9 2010
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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