Gran method for end point anticipation in monosegmented flow titration

Detalhes bibliográficos
Autor(a) principal: Aquino,Emerson V
Data de Publicação: 2004
Outros Autores: Pasquini,Celio, Rohwedder,Jarbas J. R, Raimundo Jr,Ivo M, Montenegro,M. Conceição B. S. M, Araújo,Alberto N
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=S0103-50532004000100017
Resumo: An automatic potentiometric monosegmented flow titration procedure based on Gran linearisation approach has been developed. The controlling program can estimate the end point of the titration after the addition of three or four aliquots of titrant. Alternatively, the end point can be determined by the second derivative procedure. In this case, additional volumes of titrant are added until the vicinity of the end point and three points before and after the stoichiometric point are used for end point calculation. The performance of the system was assessed by the determination of chloride in isotonic beverages and parenteral solutions. The system employs a tubular Ag2S/AgCl indicator electrode. A typical titration, performed according to the IUPAC definition, requires only 60 mL of sample and about the same volume of titrant (AgNO3) solution. A complete titration can be carried out in 1 - 5 min. The accuracy and precision (relative standard deviation of ten replicates) are 2% and 1% for the Gran and 1% and 0.5% for the Gran/derivative end point determination procedures, respectively. The proposed system reduces the time to perform a titration, ensuring low sample and reagent consumption, and full automatic sampling and titrant addition in a calibration-free titration protocol.
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spelling Gran method for end point anticipation in monosegmented flow titrationmonosegmented flow analysisGran methodchloride titrationAn automatic potentiometric monosegmented flow titration procedure based on Gran linearisation approach has been developed. The controlling program can estimate the end point of the titration after the addition of three or four aliquots of titrant. Alternatively, the end point can be determined by the second derivative procedure. In this case, additional volumes of titrant are added until the vicinity of the end point and three points before and after the stoichiometric point are used for end point calculation. The performance of the system was assessed by the determination of chloride in isotonic beverages and parenteral solutions. The system employs a tubular Ag2S/AgCl indicator electrode. A typical titration, performed according to the IUPAC definition, requires only 60 mL of sample and about the same volume of titrant (AgNO3) solution. A complete titration can be carried out in 1 - 5 min. The accuracy and precision (relative standard deviation of ten replicates) are 2% and 1% for the Gran and 1% and 0.5% for the Gran/derivative end point determination procedures, respectively. The proposed system reduces the time to perform a titration, ensuring low sample and reagent consumption, and full automatic sampling and titrant addition in a calibration-free titration protocol.Sociedade Brasileira de Química2004-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000100017Journal of the Brazilian Chemical Society v.15 n.1 2004reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532004000100017info:eu-repo/semantics/openAccessAquino,Emerson VPasquini,CelioRohwedder,Jarbas J. RRaimundo Jr,Ivo MMontenegro,M. Conceição B. S. MAraújo,Alberto Neng2004-05-25T00:00:00Zoai:scielo:S0103-50532004000100017Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2004-05-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Gran method for end point anticipation in monosegmented flow titration
title Gran method for end point anticipation in monosegmented flow titration
spellingShingle Gran method for end point anticipation in monosegmented flow titration
Aquino,Emerson V
monosegmented flow analysis
Gran method
chloride titration
title_short Gran method for end point anticipation in monosegmented flow titration
title_full Gran method for end point anticipation in monosegmented flow titration
title_fullStr Gran method for end point anticipation in monosegmented flow titration
title_full_unstemmed Gran method for end point anticipation in monosegmented flow titration
title_sort Gran method for end point anticipation in monosegmented flow titration
author Aquino,Emerson V
author_facet Aquino,Emerson V
Pasquini,Celio
Rohwedder,Jarbas J. R
Raimundo Jr,Ivo M
Montenegro,M. Conceição B. S. M
Araújo,Alberto N
author_role author
author2 Pasquini,Celio
Rohwedder,Jarbas J. R
Raimundo Jr,Ivo M
Montenegro,M. Conceição B. S. M
Araújo,Alberto N
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Aquino,Emerson V
Pasquini,Celio
Rohwedder,Jarbas J. R
Raimundo Jr,Ivo M
Montenegro,M. Conceição B. S. M
Araújo,Alberto N
dc.subject.por.fl_str_mv monosegmented flow analysis
Gran method
chloride titration
topic monosegmented flow analysis
Gran method
chloride titration
description An automatic potentiometric monosegmented flow titration procedure based on Gran linearisation approach has been developed. The controlling program can estimate the end point of the titration after the addition of three or four aliquots of titrant. Alternatively, the end point can be determined by the second derivative procedure. In this case, additional volumes of titrant are added until the vicinity of the end point and three points before and after the stoichiometric point are used for end point calculation. The performance of the system was assessed by the determination of chloride in isotonic beverages and parenteral solutions. The system employs a tubular Ag2S/AgCl indicator electrode. A typical titration, performed according to the IUPAC definition, requires only 60 mL of sample and about the same volume of titrant (AgNO3) solution. A complete titration can be carried out in 1 - 5 min. The accuracy and precision (relative standard deviation of ten replicates) are 2% and 1% for the Gran and 1% and 0.5% for the Gran/derivative end point determination procedures, respectively. The proposed system reduces the time to perform a titration, ensuring low sample and reagent consumption, and full automatic sampling and titrant addition in a calibration-free titration protocol.
publishDate 2004
dc.date.none.fl_str_mv 2004-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000100017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000100017
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532004000100017
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.15 n.1 2004
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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