Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais

Detalhes bibliográficos
Autor(a) principal: Baptista,Paula C. S.
Data de Publicação: 2003
Outros Autores: Araújo,Alberto N., Montenegro,Maria da Conceição B. S. M.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000400005
Resumo: The work describes a new procedure for cetylpyridinium chloride determination in oral disinfectants, based on a flow-injection system with potentiometric detection. The determination was based on the measurement of picrate concentration decrease as result of ion-pair reaction with the analyte present in the injected sample. In the optimised set-up the sample injection volume was kept at 400 µL and merged downstream with the reagent solution containing 1,0 x10-5 mol/L of picrate adjusted to pH 5.0 with citrate/citric acid buffer. The flow rate was fixed at 8 mL/min and the reactor length at 40 cm. The proposed procedure enables the determination of cetylpyridinium in the analytical range of 5,0x10-6 - 7,5x10-5 mol/L at a sampling rate of 60/h. The results for real samples had a precision better than 3% and were comparable to the labelled values.
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spelling Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucaispotentiometryoral disinfectantsFIAThe work describes a new procedure for cetylpyridinium chloride determination in oral disinfectants, based on a flow-injection system with potentiometric detection. The determination was based on the measurement of picrate concentration decrease as result of ion-pair reaction with the analyte present in the injected sample. In the optimised set-up the sample injection volume was kept at 400 µL and merged downstream with the reagent solution containing 1,0 x10-5 mol/L of picrate adjusted to pH 5.0 with citrate/citric acid buffer. The flow rate was fixed at 8 mL/min and the reactor length at 40 cm. The proposed procedure enables the determination of cetylpyridinium in the analytical range of 5,0x10-6 - 7,5x10-5 mol/L at a sampling rate of 60/h. The results for real samples had a precision better than 3% and were comparable to the labelled values.Sociedade Brasileira de Química2003-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000400005Química Nova v.26 n.4 2003reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422003000400005info:eu-repo/semantics/openAccessBaptista,Paula C. S.Araújo,Alberto N.Montenegro,Maria da Conceição B. S. M.por2003-08-04T00:00:00Zoai:scielo:S0100-40422003000400005Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2003-08-04T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
title Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
spellingShingle Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
Baptista,Paula C. S.
potentiometry
oral disinfectants
FIA
title_short Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
title_full Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
title_fullStr Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
title_full_unstemmed Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
title_sort Determinação potenciométrica em fluxo de cloreto de cetilpiridinio em desinfectantes bucais
author Baptista,Paula C. S.
author_facet Baptista,Paula C. S.
Araújo,Alberto N.
Montenegro,Maria da Conceição B. S. M.
author_role author
author2 Araújo,Alberto N.
Montenegro,Maria da Conceição B. S. M.
author2_role author
author
dc.contributor.author.fl_str_mv Baptista,Paula C. S.
Araújo,Alberto N.
Montenegro,Maria da Conceição B. S. M.
dc.subject.por.fl_str_mv potentiometry
oral disinfectants
FIA
topic potentiometry
oral disinfectants
FIA
description The work describes a new procedure for cetylpyridinium chloride determination in oral disinfectants, based on a flow-injection system with potentiometric detection. The determination was based on the measurement of picrate concentration decrease as result of ion-pair reaction with the analyte present in the injected sample. In the optimised set-up the sample injection volume was kept at 400 µL and merged downstream with the reagent solution containing 1,0 x10-5 mol/L of picrate adjusted to pH 5.0 with citrate/citric acid buffer. The flow rate was fixed at 8 mL/min and the reactor length at 40 cm. The proposed procedure enables the determination of cetylpyridinium in the analytical range of 5,0x10-6 - 7,5x10-5 mol/L at a sampling rate of 60/h. The results for real samples had a precision better than 3% and were comparable to the labelled values.
publishDate 2003
dc.date.none.fl_str_mv 2003-08-01
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=S0100-40422003000400005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000400005
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422003000400005
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 Química Nova v.26 n.4 2003
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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