LAUSR

The goal of this study was to propose an electroche mical sensor for Paracetamol determination. To reach this objective, a graphite electrode (GE) was modified with iron oxides, and it was tested in an alkaline aqueous so lution, in order to appreciate its electrocatalytic properties towards paraacetylamino phenol anodic oxidation. The graphite electrode modification was performed, in a first step, by potentiostatic deposition of an iron film at -1 V/SCE, in an aqueo s solution of 0.04 M Fe (NO 3)3 + 0.15 M KNO3, followed, in a second step, by cyclic voltammetry in an aqueous solution of 0.1 M sodium hydroxide, at 25 oC. The modified e lectrode was characterized by means of scanning electron microscope coupled to an EDAX X-Ray micro-analyser. Paraacetylaminophenol determination by means of thi s novel sensor was instantaneous in an alkaline solution. The performance of this se nsor was obtained in the concentration range from 13 ppm to 320 ppm, with a sensitivity of 1.6×10 μA mol L.