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Publication :
Determination of Pb in environmental samples after cloud point extraction using crown ether

bul.description.provenanceeb autorité-manquante : Blanchet-Chouinard - spbfr
bul.rights.dateAccepPubl2017-11-11fr
bul.rights.periodeEmbargoP0Mfr
bul.rights.typeDatedatePublicationfr
dc.contributor.authorBlanchet-Chouinard, Guillaume
dc.contributor.authorLarivière, Dominic
dc.date.accessioned2020-08-26T17:12:00Z
dc.date.available2020-08-26T17:12:00Z
dc.date.issued2017-11-11
dc.description.abstractIn the present study, a new cloud point extraction methodology based on the selective preconcentration and the extraction of stable lead in acidic conditions with 4′,4''(5'')-di-tert-butyldicyclohexano-18-crown-6 as a chelating agent was developed, optimized and validated. A mixture of Triton X-114 as non-ionic surfactant and CTAB as cationic surfactant was used to produce micellar structures that incorporate the chelating agent. Phase separation, induced by coacervation, was achieved by increasing the temperature of the system above the cloud point temperature. Pb extraction efficiency was maximized through an optimisation process where the effect of each parameter (i.e. non-ionic and ionic surfactant concentrations, pH, chelating agent concentration and cloud point temperature) on the chemical recoveries of Pb was assessed. Under optimum experimental conditions, the method reaches recoveries greater than 67% for Pb in a variety of complex matrices. In order to facilitate the quantification of Pb by plasma based instrumentations, a back-extraction procedure using aqueous solution of ammonium citrate were performed on the surfactant rich phase in order to reduce the effects on sample introduction and non-spectral interferences. LOD and LOQ of 0.8 µg L−1 and 2.6 µg L−1, respectively, were determined by ICP-OES for the complete procedure. Using the back-extraction approach, a preconcentration factor of 39 was achieved for an initial sample volume of 195 mL. The ruggedness of the methodology was validated by determining Pb concentration in various environmental and biological samples.fr
dc.identifier.doi10.1016/j.talanta.2017.11.015fr
dc.identifier.issn0039-9140fr
dc.identifier.pubmed29310235fr
dc.identifier.urihttp://hdl.handle.net/20.500.11794/40183
dc.languageengfr
dc.publisherElsevierfr
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.rvmPlomb -- Aspect de l'environnementfr
dc.subject.rvmEau potable -- Teneur en plombfr
dc.subject.rvmÉthers en couronnefr
dc.subject.rvmPlomb -- Mesurefr
dc.titleDetermination of Pb in environmental samples after cloud point extraction using crown etherfr
dc.typearticle de recherche
dc.type.legacyCOAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherchefr
dcterms.bibliographicCitationTalanta, Vol. 179, 300-306 (2018)fr
dspace.accessstatus.time2024-03-23 18:00:36
dspace.entity.typePublication
relation.isAuthorOfPublication80d6b102-6fc5-4a4f-aca9-989edf2b5e4f
relation.isAuthorOfPublication.latestForDiscovery80d6b102-6fc5-4a4f-aca9-989edf2b5e4f
relation.isResourceTypeOfPublication4c433ef5-3937-4530-8252-cca17d715747
relation.isResourceTypeOfPublication.latestForDiscovery4c433ef5-3937-4530-8252-cca17d715747
rioxxterms.project.funder-nameNatural Sciences and Engineering Research Council of Canadafr
rioxxterms.versionAccepted Manuscript (AM)fr
rioxxterms.version-of-recordhttps://doi.org/10.1016/j.talanta.2017.11.015fr

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