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Benzoate ion determination in beverages by using a potentiometric sensor immobilized in a graphite matrix

dc.contributor.authorPezza, Leonardo [UNESP]
dc.contributor.authorSantini, A. O.
dc.contributor.authorPezza, Helena Redigolo [UNESP]
dc.contributor.authorMelios, C. B.
dc.contributor.authorFerreira, VJF
dc.contributor.authorNasser, ALM
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:21:20Z
dc.date.available2014-05-20T15:21:20Z
dc.date.issued2001-04-11
dc.description.abstractThe characteristics, performance, and application of an electrode, namely. Pt\Hg\Hg-2(Bzt)(2)\graphite, where Bzt stands for benzoate ion. are described. This electrode responds to Bzt with sensitivity of 57.7 +/- 1.0 mV/decade over the range 5 x 10(-4)-1 x 10(-1) mol l(-1) at pH 6.0-8.0 with a detection limit of 1.6 x 10(-4) mol l(-1). The electrode shows easy construction, fast response rime (between 10-30 s), low-cost, acid excellent response stability (lifetime > 6 months, in continuous use), the proposed sensor displayed good selectivity for benzoate in the presence of several carboxylate and inorganic anions. It was used to determine benzoate in various beverages by means of the standard additions method. The results obtained by using this electrode compared very favorably with those given by the official AOAC spectrophotometric method and by a HPLC procedure as well. (C) 2001 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent281-288
dc.identifierhttp://dx.doi.org/10.1016/S0003-2670(01)00794-2
dc.identifier.citationAnalytica Chimica Acta. Amsterdam: Elsevier B.V., v. 433, n. 2, p. 281-288, 2001.
dc.identifier.doi10.1016/S0003-2670(01)00794-2
dc.identifier.issn0003-2670
dc.identifier.lattes5978908591853524
dc.identifier.lattes3192125098361121
dc.identifier.orcid0000-0003-0197-7369
dc.identifier.urihttp://hdl.handle.net/11449/32490
dc.identifier.wosWOS:000167942200013
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofAnalytica Chimica Acta
dc.relation.ispartofjcr5.123
dc.relation.ispartofsjr1,512
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbenzoate sensitive electrodept
dc.subjectpotentiometrypt
dc.subjectbeverages' analysispt
dc.titleBenzoate ion determination in beverages by using a potentiometric sensor immobilized in a graphite matrixen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes5978908591853524
unesp.author.lattes3192125098361121
unesp.author.orcid0000-0003-0197-7369[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt
unesp.departmentQuímica Analítica - IQARpt

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