Fast ultrasound-assisted treatment of urine samples for chronopotentiometric stripping determination of mercury at gold film electrodes

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dc.contributor.authorMunoz, RAA
dc.contributor.authorFelix, F. S.
dc.contributor.authorAugelli, M. A.
dc.contributor.authorPavesi, T.
dc.contributor.authorAngnes, L.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:23:10Z
dc.date.available2014-05-20T15:23:10Z
dc.date.issued2006-06-30
dc.description.abstractThis work describes an efficient, fast, and reliable analytical methodology for mercury determination in urine samples using stripping chronopotentiometry at gold film electrodes. The samples were sonicated in the presence of concentrated HCl and H2O2 for 15 min in order to disrupt the organic ligands and release the mercury. Thirty samples can be treated over the optimized region of the ultrasonic bath. This sample preparation was enough to allow the accurate stripping chronopotentiometric determination of mercury in the treated samples. No background currents and no passivation of the gold film electrode due to the sample matrix were verified. The samples were also analyzed by cold vapour atomic absorption spectrometry (CV-AAS) and good agreement between the results was verified. The analysis of NIST SRM 2670 (Toxic Metals in Freeze-Dried Urine) also validated the proposed electroanalytical method. Finally, this method was applied for mercury evaluation in urine of workers exposed to hospital waste incinerators. (c) 2006 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv São Paulo, Inst Quim, Dept Quim Fundamental, BR-05508900 São Paulo, Brazil
dc.description.affiliationUNESP, São Paulo, Brazil
dc.description.affiliationUnespUNESP, São Paulo, Brazil
dc.format.extent93-98
dc.identifierhttp://dx.doi.org/10.1016/j.aca.2006.04.034
dc.identifier.citationAnalytica Chimica Acta. Amsterdam: Elsevier B.V., v. 571, n. 1, p. 93-98, 2006.
dc.identifier.doi10.1016/j.aca.2006.04.034
dc.identifier.issn0003-2670
dc.identifier.urihttp://hdl.handle.net/11449/34002
dc.identifier.wosWOS:000238720100015
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.subjectultrasound-assisted treatmentpt
dc.subjectultrasonic bathpt
dc.subjectstripping chronopotentiometrypt
dc.subjectmercurypt
dc.subjectgold film electrodept
dc.subjecturinept
dc.titleFast ultrasound-assisted treatment of urine samples for chronopotentiometric stripping determination of mercury at gold film electrodesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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