Determination of the vinylsulphone azo dye, remazol brilliant orange 3R, by cathodic stripping voltammetry

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dc.contributor.authorZanoni, Maria Valnice Boldrin [UNESP]
dc.contributor.authorCarneiro, P. A.
dc.contributor.authorFurlan, Maysa [UNESP]
dc.contributor.authorDuarte, E. S.
dc.contributor.authorGuaratini, CCI
dc.contributor.authorFogg, A. G.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionLoughborough Univ Technol
dc.date.accessioned2014-05-20T15:27:27Z
dc.date.available2014-05-20T15:27:27Z
dc.date.issued1999-04-05
dc.description.abstractRemazol brilliant orange 3R shows only a voltammetric peak for the reduction of the azo group. No peak was observed for the reduction of the sulfatoethylsulfone or vinylsulfone reactive groups. The reduction of a pre-protonated ate group involving a two-electron process, gives a hydrate derivative in acidic solution. In alkaline solution the reduction process occurs at more negative potential with the formation of an unstable hydrate compound which decomposes via HN-NH bond cleavage and loss of a sulfate group. Optimum conditions are given for the cathodic stripping voltammetric determination of dir: dye in aqueous solution. The optimum accumulation potential and time were 0 V and up to 60 s, respectively. Linear calibration graphs were obtained from 30 to 300 ng ml(-1) in pH 4 and 6.2 to 62 ng ml(-1) in pH 10. The limit of determination obtained was 1.5 ng ml(-1) (pH 10). The coefficient of variation was 2.6% (n = 7) at 62 ng ml(-1) of the reactive dye. (C) 1999 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim, BR-14807970 Araraquara, SP, Brazil
dc.description.affiliationLoughborough Univ Technol, Dept Chem, Loughborough LE11 3TU, Leics, England
dc.description.affiliationUnespUNESP, Inst Quim, BR-14807970 Araraquara, SP, Brazil
dc.format.extent385-392
dc.identifierhttp://dx.doi.org/10.1016/S0003-2670(98)00735-1
dc.identifier.citationAnalytica Chimica Acta. Amsterdam: Elsevier B.V., v. 385, n. 1-3, p. 385-392, 1999.
dc.identifier.doi10.1016/S0003-2670(98)00735-1
dc.identifier.issn0003-2670
dc.identifier.lattes1308042794786872
dc.identifier.lattes1308042794786872
dc.identifier.orcid0000-0002-2296-1393
dc.identifier.urihttp://hdl.handle.net/11449/37428
dc.identifier.wosWOS:000079535500042
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.subjectreactive dyept
dc.subjectremazol brilliant orange 3Rpt
dc.subjectelectrochemical behaviorpt
dc.subjectbidimensional NMRpt
dc.subjectcathodic stripping voltammetrypt
dc.titleDetermination of the vinylsulphone azo dye, remazol brilliant orange 3R, by cathodic stripping voltammetryen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1308042794786872
unesp.author.lattes1308042794786872
unesp.author.orcid0000-0002-2296-1393[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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