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Standard addition flow method for potentiometric measurements at low concentration levels: application to the determination of fluoride in food samples

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dc.contributor.authorGalvis-Sánchez, Andrea C.
dc.contributor.authorSantos, João Rodrigo
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2016-01-08T11:26:42Z
dc.date.available2016-01-08T11:26:42Z
dc.date.issued2015
dc.description.abstractA standard addition method was implemented by using a flow manifold able to perform automatically multiple standard additions and in-line sample treatment. This analytical strategy was based on the in-line mixing of sample and standard addition solutions, using a merging zone approach. The flow system aimed to exploit the standard addition method to quantify the target analyte particularly in cases where the analyte concentration in the matrix is below the lower limit of linear response of the detector. The feasibility of the proposed flow configuration was assessed through the potentiometric determination of fluoride in sea salts of different origins and different types of coffee in fusions. The limit of quantification of the proposed manifold was 5x 10 6 mol L -1, 10-fold lower than the lower limit of linear response of the potentiometric detector used. A determination rate of 8 samples h -1 was achieved considering an experimental procedure based on three standard additions per sample. The main advantage of the proposed strategy is the simple approach to perform multiple standard additions, which can be implemented with other ion selective electrodes, especially in cases when the primary ion is below the lower limit of linear response of the detector.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationGALVIS-SANCHEZ, Andrea C.; SANTOS, João Rodrigues; RANGEL, Antonio O. S. S - Standard addition flow method for potentiometric measurements at low concentration levels: Application to the determination of fluoride in food samples. Talanta. ISSN 0039-9140. N.º 133 (2015), p. 1–6pt_PT
dc.identifier.doi10.1016/j.talanta.2013.12.058pt_PT
dc.identifier.eid84913597250
dc.identifier.eissn1873-3573
dc.identifier.issn0039-9140
dc.identifier.pmid25435218
dc.identifier.urihttp://hdl.handle.net/10400.14/18860
dc.identifier.wos000347656200001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationSRH/BPD/37890/2007pt_PT
dc.relationDESENVOLVIMENTO DE SISTEMAS AUTOMÁTICOS MINIATURIZADOS DE BAIXO CUSTO NA CARACTERIZAÇÃO QUÍMICA DE CAFÉS
dc.subjectStandard addition methodpt_PT
dc.subjectFluoride ion selective electrodept_PT
dc.subjectSea saltpt_PT
dc.subjectCoffeept_PT
dc.subjectWaterpt_PT
dc.subjectFlow systempt_PT
dc.titleStandard addition flow method for potentiometric measurements at low concentration levels: application to the determination of fluoride in food samplespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDESENVOLVIMENTO DE SISTEMAS AUTOMÁTICOS MINIATURIZADOS DE BAIXO CUSTO NA CARACTERIZAÇÃO QUÍMICA DE CAFÉS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F63492%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FEQB%2FLA0016%2F2013/PT
oaire.citation.endPage6
oaire.citation.startPage1
oaire.citation.titleTalanta
oaire.citation.volume133
oaire.fundingStream3599-PPCDT
person.familyNameGalvis-Sánchez
person.familyNameSantos
person.familyNameSantos Silva Rangel
person.givenNameAndrea C.
person.givenNameJoão
person.givenNameAntónio Osmaro
person.identifier.ciencia-id2315-DA7D-9221
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0003-1921-6429
person.identifier.orcid0000-0002-4182-4431
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridC-2100-2013
person.identifier.ridD-3198-2012
person.identifier.scopus-author-id6507240255
person.identifier.scopus-author-id15763817400
person.identifier.scopus-author-id7004827387
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8ac84a22-9669-41b9-b801-8f9cad91f830
relation.isAuthorOfPublicationaabaef19-ecc1-4be4-bba2-5a11228a53be
relation.isAuthorOfPublication467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isAuthorOfPublication.latestForDiscovery467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isProjectOfPublication15fe8787-765a-40ec-b79a-57189df5775c
relation.isProjectOfPublication76842dfa-b675-443a-843b-f9555a0a9199
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