Show simple item record

dc.contributor.authorRocha, Luciana S.
dc.contributor.authorGalceran i Nogués, Josep
dc.contributor.authorPuy Llorens, Jaume
dc.contributor.authorPinheiro, Jose Paulo
dc.date.accessioned2018-11-16T11:27:35Z
dc.date.available2018-11-16T11:27:35Z
dc.date.issued2015-06-16
dc.identifier.issn0003-2700
dc.identifier.urihttp://hdl.handle.net/10459.1/65125
dc.description.abstractEx-situ plated Bi film electrodes (Bi-FE) have been employed, for the first time, to measure the free concentration of Pb(II) in aqueous solutions using AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) with Stripping Chronopotentiometry (SCP) quantification. The amount of deposited Pbº, below a certain threshold, follows a Nernstian relationship with the applied potential. This threshold can be interpreted as the frontier of transition from surface deposition to solid (bulk) formation of Pbº. AGNES with Bi-FE yielded a very good detection limit (3σ) for Pb(II) of 6.0×10-9 M with an applied gain of 398 and a deposition time of 400 s. The ability of the Bi film electrode to perform speciation measurements was demonstrated for Pb(II)-PSS and Pb(II)-IDA systems. The measured values with the Bi-FE were in good agreement with the values obtained using the Hg film electrode and/or the values reported in the literature.
dc.description.sponsorshipThe authors thank Nuno G. Alves, Ana M. Rosa da Costa, and José A. Moreira for the synthesis of polystyrenesulfonate polymer. This work is supported by Portuguese funding through Fundação para a Ciência e a Tecnologia (Grant FCTANR/AAG-MAA/0065/2012), Faculdade de Ciências e Tecnologia (Grants Pest-OE/EQB/LA0023/2013 and PEst- OE/QUI/UI4023/2014), and by the Spanish Ministry of Science (Projects CTM2012-39183 and CTM2013-48967). L.S. Rocha also thanks FCT Project FCTANR/AAG-MAA/ 0065/2012 for her grant.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relationMICINN/PN2008-2011/CTM2012-39183
dc.relationMINECO/PN2013-2016/CTM2013-48967
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1021/acs.analchem.5b00606
dc.relation.ispartofAnalytical Chemistry, 2015, vol. 87, núm. 12, p. 6071-6078
dc.rights(c) American Chemical Society, 2015
dc.titleDetermination of the free metal Ion concentration using AGNES Implemented with environmentally friendly bismuth film electrodes
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2018-11-16T11:27:35Z
dc.identifier.idgrec023380
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1021/acs.analchem.5b00606


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record