Sodium dodecyl sulfate modified carbon nanotubes paste electrode as a novel sensor for the simultaneous determination of dopamine, ascorbic acid, and uric acid - 12/04/14
, Mohamad Deraman a, Nur Hamizah Basri a, Najah Syahirah Mohd Nor a, Ibrahim Abu Talib a, Narges Ataollahi bBienvenue sur EM-consulte, la référence des professionnels de santé.
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Abstract |
A novel modified multiwall carbon nanotubes paste electrode with sodium dodecyl sulfate as a surfactant (SDS) has been fabricated through an electrochemical oxidation procedure and was used to electrochemically detect dopamine (DA), ascorbic acid (AA), uric acid (UA), and their mixture by cyclic voltammetry (CV) and differential voltammetry (DPV) methods. Several factors affecting the electrocatalytic activity of the hybrid material, such as the effect of pH, of the scan rate and of the concentration were studied. The bare carbon nanotubes paste electrode (BCNTPE) and SDS-modified carbon nanotubes paste electrode (SDSMCNTPE) were characterized using Field Emission Scanning Electron Microscopy (FESEM) and Energy-Dispersive X-ray spectroscopy (EDX). Using the CV procedure, a linear analytical curve was observed in the 1×10−6–2.8×10−5M range with a detection limit at 3.3×10−7M in pH 6.5, 0.2M phosphate buffer solutions (PBS).
Le texte complet de cet article est disponible en PDF.Keywords : Carbon paste electrodes, Cyclic voltammetry, SDS, Dopamine, Uric acid, Ascorbic acid
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Vol 17 - N° 5
P. 465-476 - mai 2014 Retour au numéro
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