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Voltammetric analysis of mancozeb and its degradation product ethylenethiourea

2015-12Journal article Restricted access
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dc.contributor.authorLópez-Fernández, Olalla
dc.contributor.authorBarroso, M. Fátima
dc.contributor.authorFernandes, Diana M.
dc.contributor.authorRial-Otero, Raquel
dc.contributor.authorSimal-Gándara, Jesús
dc.contributor.authorMorais, Simone
dc.contributor.authorNouws, Henri P.A.
dc.contributor.authorFreire, Cristina
dc.contributor.authorDelerue-Matos, Cristina
dc.date.accessioned2015-12-23T15:33:18Z
dc.date.available2015-12-23T15:33:18Z
dc.date.issued2015-12
dc.description.abstractThe purpose of this work was to develop a reliable alternative method for the determination of the dithiocarbamate pesticide mancozeb (MCZ) in formulations. Furthermore, a method for the analysis of MCZ's major degradation product, ethylenethiourea (ETU), was also proposed. Cyclic voltammetry was used to characterize the electrochemical behavior of MCZ and ETU, and square-wave adsorptive stripping voltammetry (SWAdSV) was employed for MCZ quantification in commercial formulations. It was found that both MCZ and ETU are irreversibly reduced (− 0.6 V and − 0.5 V vs Ag/AgCl, respectively) at the surface of a glassy carbon electrode in a mainly diffusion-controlled process, presenting maximum peak current intensities at pH 7.0 (in phosphate buffered saline electrolyte). Several parameters of the SWAdSV technique were optimized and linear relationships between concentration and peak current intensity were established between 10–90 μmol L− 1 and 10–110 μmol L− 1 for MCZ and ETU, respectively. The limits of detection were 7.0 μmol L− 1 for MCZ and 7.8 μmol L− 1 for ETU. The optimized method for MCZ was successfully applied to the quantification of this pesticide in two commercial formulations. The developed procedures provided accurate and precise results and could be interesting alternatives to the established methods for quality control of the studied products, as well as for analysis of MCZ and ETU in environmental samples.pt_PT
dc.identifier.doi10.1016/j.jelechem.2015.08.030pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/7245
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relation.ispartofseriesJournal of Electroanalytical Chemistry;Vol. 758
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S1572665715300862pt_PT
dc.subjectMancozebpt_PT
dc.subjectEthylenethioureapt_PT
dc.subjectCyclic voltammetrypt_PT
dc.subjectSquare-wave adsorptive stripping voltammetrypt_PT
dc.titleVoltammetric analysis of mancozeb and its degradation product ethylenethioureapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage58pt_PT
oaire.citation.startPage54pt_PT
oaire.citation.titleJournal of Electroanalytical Chemistrypt_PT
oaire.citation.volume758pt_PT
person.familyNamede Sá Barroso
person.familyNameMorais
person.familyNameDelerue-Matos
person.givenNameMaria de Fátima
person.givenNameSimone
person.givenNameCristina
person.identifier1598822
person.identifier.ciencia-idAF16-22E5-5EBD
person.identifier.ciencia-idB111-BBFB-F200
person.identifier.ciencia-id9A1A-43FB-5C27
person.identifier.orcid0000-0001-9011-5992
person.identifier.orcid0000-0001-6433-5801
person.identifier.orcid0000-0002-3924-776X
person.identifier.ridD-4990-2013
person.identifier.scopus-author-id25631648000
person.identifier.scopus-author-id7007053747
person.identifier.scopus-author-id6603741848
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3d701c85-4580-4614-be6d-5a1abc8cf729
relation.isAuthorOfPublication7a9c7d63-a6c7-4159-b12d-b049b8c5c8f9
relation.isAuthorOfPublication09f6a7bd-2f15-42b0-adc5-04bd22210519
relation.isAuthorOfPublication.latestForDiscovery7a9c7d63-a6c7-4159-b12d-b049b8c5c8f9

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