Sensor for diuron quantitation based on the P450 biomimetic catalyst nickel(II) 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine

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dc.contributor.authorWong, Ademar [UNESP]
dc.contributor.authorDe Vasconcelos Lanza, Marcos Roberto
dc.contributor.authorSotomayor, Maria Del Pilar Taboada [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:28:11Z
dc.date.available2014-05-27T11:28:11Z
dc.date.issued2013-01-21
dc.description.abstractA biomimetic sensor based on a carbon paste electrode modified with the nickel(II) 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine complex was developed as a reliable alternative technique for the sensitive and selective analysis of the herbicide diuron in environmental media. The sensor was evaluated using cyclic voltammetry and amperometric techniques. The best amperometric responses were obtained at 750 mV vs. Ag/AgCl (KClsat), using 0.1 mol L-1 phosphate buffer solution at pH 8.0. Under these conditions, the sensor showed a linear response for diuron concentrations between 9.9 × 10-6 and 1.5 × 10-4 mol L -1, a sensitivity of 22817 (±261) μA L mol-1, and detection and quantification limits of 6.14 × 10-6 and 2 × 10-5 mol L-1, respectively. The presence of the nickel complex in the carbon paste improved selectivity, stability, and sensitivity (which increased 700%), compared to unmodified paste. The applicability of the sensor was demonstrated using enriched environmental samples (river water and soil). © 2012 Elsevier B.V. All rights reserved.en
dc.description.affiliationDepartment of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP), 14801-970 Araraquara, SP
dc.description.affiliationInstitute of Chemistry São Paulo University (IQSC), 13560-970 São Carlos, SP
dc.description.affiliationUnespDepartment of Analytical Chemistry Institute of Chemistry State University of São Paulo (UNESP), 14801-970 Araraquara, SP
dc.format.extent83-88
dc.identifierhttp://dx.doi.org/10.1016/j.jelechem.2012.11.007
dc.identifier.citationJournal of Electroanalytical Chemistry, v. 690, p. 83-88.
dc.identifier.doi10.1016/j.jelechem.2012.11.007
dc.identifier.issn1572-6657
dc.identifier.lattes2933194342093387
dc.identifier.scopus2-s2.0-84872313215
dc.identifier.urihttp://hdl.handle.net/11449/74405
dc.identifier.wosWOS:000317159000013
dc.language.isoeng
dc.relation.ispartofJournal of Electroanalytical Chemistry
dc.relation.ispartofjcr3.235
dc.relation.ispartofsjr0,765
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBiomimetic sensor
dc.subjectDiuron
dc.subjectNickel(II) 1,4,8,11,15,18,22,25- octabutoxy-29H,31H-phthalocyanine
dc.subjectP450 enzyme
dc.subjectA-carbon
dc.subjectAg/AgCl
dc.subjectAmperometric
dc.subjectAmperometric response
dc.subjectBiomimetic catalysts
dc.subjectBiomimetic sensors
dc.subjectCarbon pastes
dc.subjectDetection and quantification limit
dc.subjectEnvironmental media
dc.subjectEnvironmental sample
dc.subjectLinear response
dc.subjectNickel complex
dc.subjectPhosphate buffer solutions
dc.subjectPhthalocyanine complexes
dc.subjectRiver water
dc.subjectSelective analysis
dc.subjectBiomimetics
dc.subjectCarbon
dc.subjectCyclic voltammetry
dc.subjectNickel compounds
dc.subjectSensors
dc.subjectUrea
dc.subjectHerbicides
dc.titleSensor for diuron quantitation based on the P450 biomimetic catalyst nickel(II) 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanineen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes2933194342093387
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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