Electrochemical Reduction and Voltammetric Determination of Diloxanide Furoate in Non-Aqueous Medium

نویسندگان

  • André L. Santos
  • Regina M. Takeuchi
  • Nelson R. Stradiotto
چکیده

A redução eletroquímica do Furoato de Diloxanida (FD) em acetonitrila sobre um eletrodo de carbono vítreo foi estudada neste trabalho. Foi observado que o FD é reduzido após uma transferência reversível de um elétron seguida por uma reação química irreversível, diagnosticada, como uma ruptura de uma ligação C-Cl. A redução do FD foi estudada por voltametria de varredura linear (LSV), pulso diferencial (DPV) e onda quadrada (SWV). Curvas analíticas foram obtidas usando todas as técnicas voltamétricas estudadas. Para a técnica de LSV obteve-se um intervalo linear (LR) de 5,0 x 10 a 1,0 x 10 mol L, com limite de detecção (DL) de 1,5 x 10 mol L e sensibilidade (S) de 2,1 x 10 μA mol L . Os parâmetros analíticos obtidos com a técnica de DPV foram: LR = 5,0 x 10 a 2,2 x 10 mol L, DL = 7,8 x 10 mol L, S = 3,7 x 10 μA mol L. Para a técnica de SWV foram obtidos os seguintes parâmetros analíticos LR = 7,5 x 10 a 1,2 x 10 mol L, DL = 5,5 x 10 mol L e S = 2,8 x 10 μA mol L. Assim, a técnica de SWV foi a mais sensível, podendo ser empregada para a quantificação de FD em baixos níveis de concentração. Métodos estatísticos foram utilizados para avaliar o procedimento analítico, recuperações próximas a 100% e desvios padrão relativos inferiores a 5,0% (N=5) foram obtidos. Através do teste-t verificou-se que não há evidências de erros sistemáticos em nenhuma das técnicas estudadas.

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تاریخ انتشار 2005