Flow-through cell based on an array of gold microelectrodes obtained from modified integrated circuit chips

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dc.contributor.authorAugelli, M. A.
dc.contributor.authorNascimento, V. B.
dc.contributor.authorPedrotti, J. J.
dc.contributor.authorGutz, IGR
dc.contributor.authorAngnes, L.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Rural de Pernambuco (UFRPE)
dc.date.accessioned2014-05-20T15:29:33Z
dc.date.available2014-05-20T15:29:33Z
dc.date.issued1997-08-01
dc.description.abstractThe construction of a flow-through cell incorporating an array of gold microelectrodes is described and its application to flow injection analysis with amperometric detection is presented, Simple modification of almost any conventional integrated circuit chip, used as an inexpensive source of pre-assembled gold micro-wires, leads to the rapid and successful preparation of arrays of 8-48 elements, the polymeric encapsulation material from the top face of the chip is removed by abrasion until the gold micro-mires (used to interconnect the silicon circuit to the external contact pins of the chip) are disrupted and their transversal (elliptical) sections become exposed. Once polished, the flat and smooth top surface of the gold microelectrode-array chip (MEAC) is provided with a spacer and fitted under pressure against an acrylic block with the reference and auxiliary electrodes, to form the electrochemical (thin-layer) flow cell, while the contact pins are plugged into a standard IC socket, This design ensures autonomous electric contact with each electrode and allows fast dismantling for polishing or substitution, the performance of flow cells with MEACs was investigated utilizing the technique of reverse pulse amperometry without oxygen removal, A method was established for the determination of the copper concentration in sugar cane spirit, regulated by law for beverages, Samples from industrial producers and small-scale (alembic) brewers were compared, With a 24 MEAC, a detection limit of 30 mu g I-l of copper (4.7 x 10(-7) mol l(-1) of Cu-II for 100 mu l injections) was calculated, Routine operation was established at a frequency of 60-90 determinations per hour, Intercomparison with atomic absorption spectrometric determinations resulted in excellent agreement.en
dc.description.affiliationUNESP,FAC ENGN GUARATINGUETA,SAO PAULO,BRAZIL
dc.description.affiliationUNIV FED RURAL PERNAMBUCO,DEPT QUIM,RECIFE,PE,BRAZIL
dc.description.affiliationUnespUNESP,FAC ENGN GUARATINGUETA,SAO PAULO,BRAZIL
dc.format.extent843-847
dc.identifierhttp://dx.doi.org/10.1039/a701519d
dc.identifier.citationAnalyst. Cambridge: Royal Soc Chemistry, v. 122, n. 8, p. 843-847, 1997.
dc.identifier.doi10.1039/a701519d
dc.identifier.issn0003-2654
dc.identifier.urihttp://hdl.handle.net/11449/39118
dc.identifier.wosWOS:A1997XQ87300023
dc.language.isoeng
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofAnalyst
dc.relation.ispartofjcr3.864
dc.relation.ispartofsjr1,249
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectflow-through cellpt
dc.subjectgold microelectrode arraypt
dc.subjectintegrated circuit chipspt
dc.subjectreverse pulse amperometrypt
dc.subjectflow injection analysispt
dc.titleFlow-through cell based on an array of gold microelectrodes obtained from modified integrated circuit chipsen
dc.typeArtigo
dcterms.licensehttp://www.rsc.org/AboutUs/Copyright/LicencetoPublishforjournals.asp
dcterms.rightsHolderRoyal Soc Chemistry
unesp.author.orcid0000-0002-8274-3291[2]
unesp.author.orcid0000-0001-9759-7920[4]
unesp.author.orcid0000-0002-7968-0146[3]

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