Carbon Nanotubes Modified with SnO2Rods for Levofloxacin Detection
Abstract
Um novo sensor baseado em nanotubos de carbono de paredes múltiplas modificado com bastões de SnO 2 foi desenvolvido para a determinação eletroquímica de levofloxacino.A morfologia, a estrutura, e o comportamento eletroquímico do eletrodo compósito foram caracterizados por microscopia eletrônica de varredura, energia dispersiva de raios X e voltametria cíclica, respectivamente.Voltametria de pulso diferencial em solução tampão fosfato pH 6,0 permitiu a aplicação de um método para determinar níveis de levofloxacino em um intervalo de 1,0-9,9 µmol L -1 , com limite de detecção calculado em 0,2 µmol L -1 (72,0 mg L -1 ).A new sensor based on multi-walled carbon nanotubes modified with SnO 2 rods for the electrochemical determination of levofloxacin has been investigated.The morphology, the structure, and the electrochemical performance of the composite electrode were characterised by scanning electron microscopy, energy dispersive X-ray spectroscopy, and cyclic voltammetry, respectively.Differential pulse voltammetry in phosphate buffer solution at pH 6.0, allowed the application of a method to determine levofloxacin levels in a range of 1.0-9.9µmol L -1 , with a limit of detection calculated at 0.2 µmol L -1 (72.0 mg L -1 ).
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