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Electrochemical sensor for simultaneous determination of herbicide MCPA and its metabolite 4-chloro-2-methylphenol. Application to photodegradation environmental monitoring

dc.contributor.authorRahemi, V.
dc.contributor.authorGarrido, J. M. P. J.
dc.contributor.authorBorges, F.
dc.contributor.authorBrett, C. M. A.
dc.contributor.authorGarrido, E. M. P. J.
dc.date.accessioned2016-01-25T10:54:20Z
dc.date.available2016-01-25T10:54:20Z
dc.date.issued2015
dc.description.abstractThe development and application of a polyaniline/carbon nanotube (CNT) cyclodextrin matrix (PANI-β-CD/MWCNT)-based electrochemical sensor for the quantitative determination of the herbicide 4-chloro-2-methylphenoxyacetic acid (MCPA) and its main transformation product 4-chloro-2-methylphenol in natural waters are described. A simple cyclic voltammetry-based electrochemical methodology, in phosphate buffer solution at pH 6.0, was used to develop a method to determine both MCPA and 4-chloro-2-methylphenol, without any previous extraction or derivatization steps. A linear concentration range (10 to 50 μmol L−1) and detection limits of 1.1 and 1.9 μmol L−1, respectively, were achieved using optimized cyclic voltammetric parameters. The proposed method was successfully applied to the determination of MCPA and 4-chloro-2-methylphenol in natural water samples with satisfactory recoveries (94 to 107 %) and in good agreement with the results obtained by an established high-performance liquid chromatography technique, no significant differences being found between the methods. Interferences from ionic species and other herbicides used for broad-leaf weed control were shown to be small. The newly developed methodology was also successfully applied to MCPA photodegradation environmental studies.pt_PT
dc.identifier.doi10.1007/s11356-014-3693-ypt_PT
dc.identifier.issn0944-1344
dc.identifier.urihttp://hdl.handle.net/10400.22/7485
dc.language.isoengpt_PT
dc.publisherSpringerpt_PT
dc.relation.ispartofseriesEnvironmental Science and Pollution Research;Vol. 22, Issue 6
dc.relation.publisherversionhttp://link.springer.com/article/10.1007/s11356-014-3693-ypt_PT
dc.subjectHerbicidespt_PT
dc.subjectMCPApt_PT
dc.subject4-Chloro-2-methylphenolpt_PT
dc.subjectVoltammetric sensorpt_PT
dc.subjectCarbon nanotubespt_PT
dc.titleElectrochemical sensor for simultaneous determination of herbicide MCPA and its metabolite 4-chloro-2-methylphenol. Application to photodegradation environmental monitoringpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage4499pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage4491pt_PT
oaire.citation.titleEnvironmental Science and Pollution Researchpt_PT
oaire.citation.volume22pt_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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