Fabrication of a Novel Electrochemical Nanosensor for Voltammetric Determination of Naproxen

A novel carbon paste electrode modified with NiO/CNTs nanocomposite and an ionic liquid (n-hexyl-3-methylimidazolium hexafluoro phosphate) was fabricated. The electrochemical study of the modified electrode, as well as its efficiency for voltammetric oxidation of naproxen, is described. The electrode was also employed to study the electrochemical oxidation of naproxen, using cyclic voltammetry, chronoamperometry and square wave voltammetry as diagnostic techniques. Square wave voltammetry exhibits a linear dynamic range from 7.5×10−7 to 8.0×10−4 M and a detection limit of 1.2×10−7 M for naproxen.