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Título: New voltammetry-based analytical method for indirect determination of procymidone in brazilian apples
Autor(es): Fulgêncio, Ana Carolina da Costa
Saczk, Adelir Aparecida
Oliveira, Marcelo Firmino de
Okumura, Leonardo Luiz
Assunto: Procymidone
Brazilian apple
Differential pulse voltammetry
Square-wave voltammetry
Publicador: Springer US
Data de publicação: 16-Jun-2016
Referência: FULGÊNCIO, A. C. da C. et al. New voltammetry-based analytical method for indirect determination of procymidone in brazilian apples. Food Analytical Methods, [S.l.], v. 7, n. 1, p. 31-38, Jan. 2014.
Abstract: Procymidone, a potentially carcinogenic and mutagenic pesticide, can contribute to environmental and human contamination when applied to apple crops. In this work, we propose a reliable and sensitive method to determine procymidone in Brazilian apples. The method involves differential pulse (DPV) and square-wave voltammetry (SWV) techniques on a glassy carbon electrode. In a supporting electrolyte solution of 0.5 mol L−1 NaOH, procymidone undergoes an irreversible one-electron oxidation at +1.42 V by cyclic voltammetric vs. Ag|AgCl, KCl 3 M reference electrode. The proposed DPV and SWV methods have a good linear response in the 8.00–20.0 mg L−1 range, with limits of detection (LOD) of 0.678 and 0.228 mg L−1, respectively, in the absence of the matrix. We obtained improved LOD (0.097 mg L−1) in the presence of apple matrix and the supporting electrolyte solution. We used three commercial apple samples to evaluate recovery, and we achieved recovery percentages ranging from 94.6 to 110 % for procymidone determinations. We also tested the proposed voltammetric method for reproducibility, repeatability, and potential interferents, and the results were satisfactory for electroanalytical purposes.
URI: http://link.springer.com/article/10.1007%2Fs12161-013-9593-9
http://repositorio.ufla.br/jspui/handle/1/11268
Idioma: en_US
Aparece nas coleções: DQI - Artigos publicados em periódicos

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