Electrocatalytic Detection of Dopamine and Uric acid at poly (Basic Blue B) Modified Carbon Nanotube Paste Electrode
Abstract
Electropolymerization of Basic Blue B by cyclic voltammetry (CV) onto the carbon nanotube (CNT) paste electrode results in the formation of
poly (Basic Blue B) film/modified CNT paste electrode (PBBB/MCNTPE). The Modified electrode was used for the electrochemical determination
of dopamine (DA) and uric acid. CV results showed that this PBBB/MCNTPE have reversible redox behavior in electrolyte solution. The resulting
PBBB/MCNTPE were characterized using field emission scanning electron microscope. The analytical ability was tested with respect to the scan rate,
number of cycle, pH of solution, and concentration variation. Measurement of these analytes studied simultaneously by CV and differential pulse
voltammetry methods. The analytical curve for DA presented linear dependence over the concentration range from 3 × 10
M with
a linear correlation coefficient of 0.99036. The detection limit of this method was 5.8 × 10
. The method has good selectivity and sensitivity with
satisfactory results.
Keywords: Carbon nanotubes paste electrode, Cyclic voltammetry, Poly (Basic Blue B), Dopamine, Uric acid.
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