Electromembrane extraction and preconcentration of carbendazim and thiabendazole in water samples before capillary electrophoresis analysis

Autor(es)

Oliveira, Amilton Moreira ; Loureiro, Hugo Campos ; Souza de Jesus, Francielly Fernanda ; de Jesus, Dosil Pereira

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SEPARATION SCIENCE; v. 40, n. 7, p. 1532-1539, APR 2017.
• Citações Web of Science: 12

Resumo

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. (AU)

• Processo FAPESP: 13/22485-6 - Desenvolvimento e aplicação de eletroextração em membrana em métodos eletroforéticos de análises
• Beneficiário: Dosil Pereira de Jesus
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático