DEVELOPMENT OF A CHEMICALLY MODIFIED ELECTRODE BASED ON CARBON PASTE AND FUNCTIONALIZED SILICA-GEL FOR PRECONCENTRATION AND VOLTAMMETRIC DETERMINATION OF MERCURY(II)

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dc.contributor.authorAleixo, L. M.
dc.contributor.authorSouza, MDB
dc.contributor.authorGodinho, OES
dc.contributor.authorNeto, G. D.
dc.contributor.authorGushikem, Y.
dc.contributor.authorMoreira, J. C.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:56Z
dc.date.available2014-05-20T15:20:56Z
dc.date.issued1993-01-08
dc.description.abstractA mercury-sensitive chemically modified electrode (CME) based on modified silica gel-containing carbon paste was developed. The functional group attached to the silica gel surface was 3-(2-thiobenzimidazolyl)propyl, which is able to complex mercury ions. This electrode was applied to the determination of mercury(II) ions in aqueous solution. The mercury was chemically preconcentrated on the CME prior to voltammetric determination by anodic stripping in the differential-pulse mode. A calibration graph covering the concentration range from 0.08 to 2 mg l-1 was constructed. The precision for six determinations of 0.122 and 0.312 mg l-1 Hg(II) was 3.2 and 2.9% (relative standard deviation), respectively. The detection limit for a 5-min preconcentration period was 0.013 mg l-1. A study for foreign ions was also made.en
dc.description.affiliationUNESP,INST QUIM,BR-14800 ARARAQUARA,SP,BRAZIL
dc.description.affiliationUnespUNESP,INST QUIM,BR-14800 ARARAQUARA,SP,BRAZIL
dc.format.extent143-148
dc.identifierhttp://dx.doi.org/10.1016/0003-2670(93)80561-X
dc.identifier.citationAnalytica Chimica Acta. Amsterdam: Elsevier B.V., v. 271, n. 1, p. 143-148, 1993.
dc.identifier.doi10.1016/0003-2670(93)80561-X
dc.identifier.issn0003-2670
dc.identifier.urihttp://hdl.handle.net/11449/32129
dc.identifier.wosWOS:A1993KG79600017
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.subjectVOLTAMMETRYpt
dc.subjectCARBON PASTE ELECTRODESpt
dc.subjectCHEMICALLY MODIFIED ELECTRODESpt
dc.subjectFUNCTIONALIZED SILICA GELpt
dc.subjectMERCURYpt
dc.subjectPRECONCENTRATIONpt
dc.titleDEVELOPMENT OF A CHEMICALLY MODIFIED ELECTRODE BASED ON CARBON PASTE AND FUNCTIONALIZED SILICA-GEL FOR PRECONCENTRATION AND VOLTAMMETRIC DETERMINATION OF MERCURY(II)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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