Publicação: Polished silver solid amalgam electrodes in eletroanalytical determination of carbamates pesticides: The methomyl case.
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CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA::ELETROANALITICA
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The polished silver solid amalgam electrode (p-AgSAE) combined with square wave voltammetry (SWV) was
used in the development of an analytical procedure to Methomyl determination in natural water samples. The
experimental and voltammetric parameters were optimized and the use of cationic surfactant cetyltrimethyl
ammonium bromide promoted a considerable change in the kinetic and mechanism of the Methomyl reaction.
Was observed the presence one-single reduction peak, related to a totally irreversible two-electrons transfer,
followed by chemical reaction involving two protons. Analytical parameters (linearity range, analytical curve
equations, correlation coefficient, detection and quantification limits, recovery efficiency, and relative standard
deviation for intraday and interday experiments) were evaluated indicating that the proposed voltammetric
procedure is suitable for determination of Methomyl. The application of the proposed procedure in natural water
analysis indicated high robustness with only simple filtration, without pre-concentration steps, good stability
and suitable sensitivity to determination of Methomyl in natural water samples.
Abstract
Palavras-chave
Polished silver solid amalgam electrode, Cationic surfactant, Methomyl, Endocrine disrupter, Natural water samples, Square wave voltammetry
Citação
SILVA, Caio César Gonçalves. Polished silver solid amalgam electrode and cationic surfactant as a tool in the electroanalytical determination of methomyl pesticide. 2018. 8 f. (Graduation in Biotechnology) - Federal University of Uberlândia, Patos de Minas, 2018.