dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorLoughborough Univ Technol
dc.date.accessioned2014-05-20T15:27:27Z
dc.date.accessioned2022-10-05T16:43:03Z
dc.date.available2014-05-20T15:27:27Z
dc.date.available2022-10-05T16:43:03Z
dc.date.created2014-05-20T15:27:27Z
dc.date.issued1999-04-05
dc.identifierAnalytica Chimica Acta. Amsterdam: Elsevier B.V., v. 385, n. 1-3, p. 385-392, 1999.
dc.identifier0003-2670
dc.identifierhttp://hdl.handle.net/11449/37428
dc.identifier10.1016/S0003-2670(98)00735-1
dc.identifierWOS:000079535500042
dc.identifier1308042794786872
dc.identifier1308042794786872
dc.identifier0000-0002-2296-1393
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3908953
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.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationAnalytica Chimica Acta
dc.relation5.123
dc.relation1,512
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectreactive dye
dc.subjectremazol brilliant orange 3R
dc.subjectelectrochemical behavior
dc.subjectbidimensional NMR
dc.subjectcathodic stripping voltammetry
dc.titleDetermination of the vinylsulphone azo dye, remazol brilliant orange 3R, by cathodic stripping voltammetry
dc.typeArtigo


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