Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry
Autor(a) principal: | |
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Data de Publicação: | 2012 |
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=S0103-50532012000400012 |
Resumo: | Caffeine determination using a fast-scan voltammetric procedure at a carbon fiber ultramicroelectrode (CF-UME) is described. The CF-UME was submitted to electrochemical pretreatment. Parameters such as number of acquisition cycles, scan rate, potential window, and the electrochemical surface pretreatment were optimized. Using the optimized conditions, it was possible to achieve a LDR from 10.0 up to 200 μmol L-1, with a LOD of 3.33 μmol L-1. The method has been applied in the determination of caffeine in commercial samples, with errors of 1.0-3.5% in relation to the label values and recoveries of 97-114% within the linear range. |
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Journal of the Brazilian Chemical Society (Online) |
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Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetrycaffeinecarbon fiber ultramicroelectrodefast scan voltammetric determinationsCaffeine determination using a fast-scan voltammetric procedure at a carbon fiber ultramicroelectrode (CF-UME) is described. The CF-UME was submitted to electrochemical pretreatment. Parameters such as number of acquisition cycles, scan rate, potential window, and the electrochemical surface pretreatment were optimized. Using the optimized conditions, it was possible to achieve a LDR from 10.0 up to 200 μmol L-1, with a LOD of 3.33 μmol L-1. The method has been applied in the determination of caffeine in commercial samples, with errors of 1.0-3.5% in relation to the label values and recoveries of 97-114% within the linear range.Sociedade Brasileira de Química2012-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400012Journal of the Brazilian Chemical Society v.23 n.4 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012000400012info:eu-repo/semantics/openAccessNunes,Ronaldo S.Cavalheiro,Éder T. G.eng2012-04-27T00:00:00Zoai:scielo:S0103-50532012000400012Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-04-27T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
title |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
spellingShingle |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry Nunes,Ronaldo S. caffeine carbon fiber ultramicroelectrode fast scan voltammetric determinations |
title_short |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
title_full |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
title_fullStr |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
title_full_unstemmed |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
title_sort |
Caffeine determination at a carbon fiber ultramicroelectrodes by fast-scan cyclic voltammetry |
author |
Nunes,Ronaldo S. |
author_facet |
Nunes,Ronaldo S. Cavalheiro,Éder T. G. |
author_role |
author |
author2 |
Cavalheiro,Éder T. G. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Nunes,Ronaldo S. Cavalheiro,Éder T. G. |
dc.subject.por.fl_str_mv |
caffeine carbon fiber ultramicroelectrode fast scan voltammetric determinations |
topic |
caffeine carbon fiber ultramicroelectrode fast scan voltammetric determinations |
description |
Caffeine determination using a fast-scan voltammetric procedure at a carbon fiber ultramicroelectrode (CF-UME) is described. The CF-UME was submitted to electrochemical pretreatment. Parameters such as number of acquisition cycles, scan rate, potential window, and the electrochemical surface pretreatment were optimized. Using the optimized conditions, it was possible to achieve a LDR from 10.0 up to 200 μmol L-1, with a LOD of 3.33 μmol L-1. The method has been applied in the determination of caffeine in commercial samples, with errors of 1.0-3.5% in relation to the label values and recoveries of 97-114% within the linear range. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-04-01 |
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=S0103-50532012000400012 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532012000400012 |
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.23 n.4 2012 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_ |
1750318173157064704 |