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摘要
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 mu M-0.55 mM) with a detection limit (LD) of 0.5 mu M (signal/noise = 3) under the optimal conditions. Moreover, the stability and the reproducibility of the biosensor are satisfactorily evaluated.
- 出版日期2014-1
