Abstract
An electrochemical biosensor for the accurate determination of salicylic acid (SA) is prepared by potentiostatic deposition of nickel on the glassy carbon electrode (GCE). The electrochemical performance of the Ni/GCE film and the parameters affecting its activity are investigated by cyclic voltammetry, amperometry and electrochemical impedance spectroscopy (EIS). The electrooxidation of SA is significantly enhanced on Ni/GCE, compared to GCE. Indeed, the modified electrode has a fast response (less than 3 s) and excellent linear behavior over a wide SA concentration range (2 μM-0.55 mM) with a detection limit (LD) of 0.5 μM (signal/noise = 3) under the optimal conditions. Moreover, the stability and the reproducibility of the biosensor are satisfactorily evaluated.
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Doulache, M., Benchettara, A. & Trari, M. Detection of salicylic acid by electrocatalytic oxidation at a nickel-modified glassy carbon electrode. J Anal Chem 69, 51–56 (2014). https://doi.org/10.1134/S1061934814010067
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DOI: https://doi.org/10.1134/S1061934814010067