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Application of permeation liquid membrane and scanned stripping chronopotentiometry to metal speciation analysis of colloidal complexes

2007Journal article Restricted access
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dc.contributor.authorDomingos, R. F.
dc.contributor.authorBenedetti, M. F.
dc.contributor.authorPinheiro, J. P.
dc.date.accessioned2013-12-02T15:21:14Z
dc.date.available2013-12-02T15:21:14Z
dc.date.issued2007
dc.date.updated2013-11-26T16:33:49Z
dc.description.abstractThe potential of permeation liquid membrane (PLM) to obtain dynamic metal speciation information for colloidal complexes is evaluated by measurements of lead(II) and copper(II) complexation by carboxyl modified latex nanospheres of different radii (15, 35, 40 and 65 nm). The results are compared with those obtained by a well characterized technique: stripping chronopotentiometry at scanned deposition potential (SSCP). Under the PLM conditions employed, and for large particles or macromolecular ligands, membrane diffusion is the rate-limiting step. That is, the flux is proportional to the free metal ion concentration with only a small contribution from labile complexes. In the absence of ligand aggregation in the PLM channels, good agreement was obtained between the stability constants determined by PLM and SSCP for both metals.por
dc.identifier.citationDomingos, R. F.; Benedetti, M. F.; Pinheiro, J. P. Application of permeation liquid membrane and scanned stripping chronopotentiometry to metal speciation analysis of colloidal complexes, Analytica Chimica Acta, 589, 2, 261-268, 2007.por
dc.identifier.doihttp://dx.doi.org/10.1016/j.aca.2007.02.056
dc.identifier.issn0003-2670
dc.identifier.otherAUT: JPI01020;
dc.identifier.urihttp://hdl.handle.net/10400.1/3186
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Massonpor
dc.subjectColloidal dispersionspor
dc.subjectDynamic speciationpor
dc.subjectLabilitypor
dc.subjectPermeable liquid membranepor
dc.subjectStripping chronopotentiometry at scanned deposition potentialpor
dc.titleApplication of permeation liquid membrane and scanned stripping chronopotentiometry to metal speciation analysis of colloidal complexespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage268por
oaire.citation.issue2por
oaire.citation.startPage261por
oaire.citation.titleAnalytica Chimica Actapor
oaire.citation.volume589por
person.familyNamePinheiro
person.givenNameJosé Paulo
person.identifier.orcid0000-0001-7925-9733
person.identifier.ridE-8402-2013
person.identifier.scopus-author-id35838299700
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication5caedbac-d2b5-4a86-91a7-083bf83edda3
relation.isAuthorOfPublication.latestForDiscovery5caedbac-d2b5-4a86-91a7-083bf83edda3

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