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Type: Artigo
Title: Electromembrane Extraction And Preconcentration Of Carbendazim And Thiabendazole In Water Samples Before Capillary Electrophoresis Analysis
Author: Oliveira
Amilton Moreira; Loureiro
Hugo Campos; Souza de Jesus
Francielly Fernanda; de Jesus
Dosil Pereira
Abstract: Electromembrane extraction using a polypropylene hollow fiber impregnated with 1-ethyl-2-nitrobenzene was evaluated for the extraction and preconcentration of the fungicides thiabendazole and carbendazim from water samples before capillary electrophoresis analysis. The composition of the supported liquid membrane, the HCl concentration in the acceptor solution, and the stirring rate (of the donor solution) were optimized using the one-variable-at-a-time method. In contrast, a face-centered central composition design was used for optimization of voltage, extraction time, and concentration of HCl in the donor solution. After optimization, electromembrane extraction provided enrichment factors of 50 and 26 for thiabendazole and carbendazim that allowed us to achieve limits of detection of 1.1 and 2.3 mu g/L, respectively. Repeatability (intraday precision) expressed as the relative standard deviation varied from 2.5 to 2.8%, while the interday precision ranged from 3.1 to 3.3%. The proposed method was applied for analysis of samples of tap and river water, and acceptable precision and accuracy were attained.
Subject: Capillary Electrophoresis
Environmental Analysis
Sample Preparation
Editor: Wiley-V C H Verlag Gmbh
Citation: Journal Of Separation Science. Wiley-v C H Verlag Gmbh, v. 40, p. 1532 - 1539, 2017.
Rights: fechado
Identifier DOI: 10.1002/jssc.201601305
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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