Publication
Evaluation of nanometer thick mercury film electrodes for stripping chronopotentiometry
| dc.contributor.author | Rocha, L. S. | |
| dc.contributor.author | Pinheiro, J. P. | |
| dc.contributor.author | Carapuça, H. M. | |
| dc.date.accessioned | 2013-11-29T10:54:01Z | |
| dc.date.available | 2013-11-29T10:54:01Z | |
| dc.date.issued | 2007-11-15 | |
| dc.date.updated | 2013-11-26T16:35:19Z | |
| dc.description.abstract | In this work, the performance and applicability of the thin mercury film electrode (TMFE) in the heavy metal speciation, by stripping chronopotentiometry (SCP), were exploited. The TMFE thickness was optimized and a 7.6 nm mercury film was selected. This TMFE was mechanically stable and able to perform 60 SCP consecutive measurements, with no significant variation in the analytical signal of lead(II) (RSD less than 2%). Due to the small electrode thickness the measurements were performed under conditions of complete depletion over a wide oxidation current (Is) range, i.e., within the interval [75–500] × 10−9 A. The limit of detection (3σ) for lead(II) was 2.4 × 10−9 M for a deposition time of 40 s and an oxidation current of 75 × 10−9 A. The TMFE was successfully applied to the construction of SSCP experimental waves, which were in conformity to those predicted by the theory. The stability constant calculated (K′) for the Pb(II)-carboxylated latex nanospheres system using a TMFE, agreed with the one obtained using the HMDE, for identical experimental conditions. | por |
| dc.identifier.citation | Rocha, L.S.; Pinheiro, J.P.; Carapuça, H.M.Evaluation of nanometer thick mercury film electrodes for stripping chronopotentiometry, Journal of Electroanalytical Chemistry, 610, 1, 37-45, 2007. | por |
| dc.identifier.doi | http://dx.doi.org/doi:10.1016/j.jelechem.2007.06.018 | |
| dc.identifier.issn | 1572-6657 | |
| dc.identifier.other | AUT: JPI01020; | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/3168 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | por |
| dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0022072807002963 | por |
| dc.subject | Thin mercury film electrode | por |
| dc.subject | Stripping chronopotentiometry | por |
| dc.subject | Scanned stripping chronopotentiometry | por |
| dc.subject | Trace metal speciation | por |
| dc.subject | Latex nanospheres | por |
| dc.title | Evaluation of nanometer thick mercury film electrodes for stripping chronopotentiometry | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 45 | por |
| oaire.citation.issue | 1 | por |
| oaire.citation.startPage | 37 | por |
| oaire.citation.title | Journal of Electroanalytical Chemistry Editorial Board | por |
| person.familyName | Pinheiro | |
| person.givenName | José Paulo | |
| person.identifier.orcid | 0000-0001-7925-9733 | |
| person.identifier.rid | E-8402-2013 | |
| person.identifier.scopus-author-id | 35838299700 | |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | |
| relation.isAuthorOfPublication | 5caedbac-d2b5-4a86-91a7-083bf83edda3 | |
| relation.isAuthorOfPublication.latestForDiscovery | 5caedbac-d2b5-4a86-91a7-083bf83edda3 |