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Dental amalgam electrode as voltammetric sensor to triazine-based pesticides determination: application in natural water samples

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dc.contributor.advisor1Souza, Djenaine de
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/2330157389721384pt_BR
dc.contributor.referee1Silva, Lucas Moreira
dc.contributor.referee2Muñoz, Rodrigo Alejandro Abarza
dc.contributor.referee3Latteshttp://lattes.cnpq.br/0884149595277368pt_BR
dc.creatorMartins, Fernanda Cristina de Oliveira Lopes
dc.creator.Latteshttp://lattes.cnpq.br/8283458910117313pt_BR
dc.date.accessioned2019-08-26T18:24:47Z
dc.date.available2019-08-26T18:24:47Z
dc.date.issued2019-07-08
dc.description.degreenameTrabalho de Conclusão de Curso (Graduação)pt_BR
dc.description.resumoThis paper describes the use of a dental amalgam electrode (DAE) allied to square wave voltammetry (SWV) in the analytical determination of the triazine-based pesticides ametryn (AM), atrazine (AT) and simazine (SI) in natural waters. Experimental and voltammetric parameters were optimized as Brinton-Robinson buffer at pH 2.5, with pulse frequency of 100 s-1, pulse amplitude of 50 mV and scan increment of -2 mV, where the triazines presented well-defined irreversible voltammetric peaks, at -1.05 V, -0.97 V and -0.99 V for AM, AT and SI respectively. For AM and SI was observed a redox reaction controlled by diffusion rate and for AT a reaction controlled by adsorption kinetic. Besides, in AM occurred the reduction of bond carbon-SCH3 and in AT and SI the reduction of bond carbon-chloride. Analytical curves were constructed, and the voltammetric signals were directly proportional to concentration, and to all triazines, the detection limits were lower than the maximum of residues permitted in natural water by Brazilian Environmental Agency, 100 g L-1 (100 ppb) and around the obtained using traditional techniques and other electrodic surfaces. The recovery percentages, in pure electrolyte and natural waters, were around 100%, demonstrating that the methodology proposed is suitable for determining any contamination by AM, AT and SI natural waters samples.pt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo a Pesquisa do Estado de Minas Geraispt_BR
dc.identifier.citationMARTINS, Fernanda Cristina de Oliveira Lopes. Dental amalgam electrode as voltammetric sensor to triazine-based pesticides determination: application in natural water samples. 2019. 39 f. Trabalho de Conclusão de Curso (Graduação em Engenharia de Alimentos) - Universidade Federal de Uberlândia, Uberlândia, 2019.pt_BR
dc.identifier.urihttps://repositorio.ufu.br/handle/123456789/26799
dc.languageengpt_BR
dc.publisherUniversidade Federal de Uberlândiapt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.courseEngenharia de Alimentospt_BR
dc.rightsAcesso Abertopt_BR
dc.sizeorduration39pt_BR
dc.subjectTriazine-based pesticidespt_BR
dc.subjectDental amalgam electrodept_BR
dc.subjectAmetrynpt_BR
dc.subjectSimazinept_BR
dc.subjectAtrazinept_BR
dc.subjectSquare wave voltammetrypt_BR
dc.subject.cnpqCNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::CIENCIA DE ALIMENTOSpt_BR
dc.subject.cnpqCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICApt_BR
dc.titleDental amalgam electrode as voltammetric sensor to triazine-based pesticides determination: application in natural water samplespt_BR
dc.typeTrabalho de Conclusão de Cursopt_BR
dspace.entity.typePublication

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TCC - Engenharia de Alimentos (Patos de Minas)