Caffeine Determination at a Carbon Fiber Ultramicroelectrodes by Fast-Scan Cyclic Voltammetry

Bibliographic Details
Main Author: Nunes, Ronaldo S. [UNESP]
Publication Date: 2012
Other Authors: Cavalheiro, Eder T. G.
Format: Article
Language: eng
Source: Repositório Institucional da UNESP
Download full: http://dx.doi.org/10.1590/S0103-50532012000400012
http://hdl.handle.net/11449/9192
Summary: 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 mu mol L-1, with a LOD of 3.33 mu mol 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.
id UNSP_0b1fbfa50d625b98a0b9b8df30fb3adb
oai_identifier_str oai:repositorio.unesp.br:11449/9192
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling 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 mu mol L-1, with a LOD of 3.33 mu mol 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ São Paulo, Inst Quim São Carlos, BR-13566590 São Carlos, SP, BrazilUniv Estadual Paulista, Fac Engn Guaratingueta, Dept Quim & Fis, BR-12516410 Guaratingueta, SP, BrazilUniv Estadual Paulista, Fac Engn Guaratingueta, Dept Quim & Fis, BR-12516410 Guaratingueta, SP, BrazilSoc Brasileira QuimicaUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Nunes, Ronaldo S. [UNESP]Cavalheiro, Eder T. G.2014-05-20T13:27:45Z2014-05-20T13:27:45Z2012-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article670-677http://dx.doi.org/10.1590/S0103-50532012000400012Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 23, n. 4, p. 670-677, 2012.0103-5053http://hdl.handle.net/11449/919210.1590/S0103-50532012000400012S0103-50532012000400012WOS:000303444600012S0103-50532012000400012.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2024-07-01T20:52:08Zoai:repositorio.unesp.br:11449/9192Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-07-01T20:52:08Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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. [UNESP]
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. [UNESP]
author_facet Nunes, Ronaldo S. [UNESP]
Cavalheiro, Eder T. G.
author_role author
author2 Cavalheiro, Eder T. G.
author2_role author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Nunes, Ronaldo S. [UNESP]
Cavalheiro, Eder 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 mu mol L-1, with a LOD of 3.33 mu mol 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
2014-05-20T13:27:45Z
2014-05-20T13:27:45Z
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://dx.doi.org/10.1590/S0103-50532012000400012
Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 23, n. 4, p. 670-677, 2012.
0103-5053
http://hdl.handle.net/11449/9192
10.1590/S0103-50532012000400012
S0103-50532012000400012
WOS:000303444600012
S0103-50532012000400012.pdf
url http://dx.doi.org/10.1590/S0103-50532012000400012
http://hdl.handle.net/11449/9192
identifier_str_mv Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 23, n. 4, p. 670-677, 2012.
0103-5053
10.1590/S0103-50532012000400012
S0103-50532012000400012
WOS:000303444600012
S0103-50532012000400012.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of the Brazilian Chemical Society
1.444
0,357
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 670-677
dc.publisher.none.fl_str_mv Soc Brasileira Quimica
publisher.none.fl_str_mv Soc Brasileira Quimica
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv repositoriounesp@unesp.br
_version_ 1834484213770878976

Similar Items