The present disclosure discloses an electroanalytical sensor for the detection of meloxicam. The electroanalytical sensor comprises a carbon electrode. The carbon electrode comprises zinc oxide (ZnO) nanoparticles, wherein the ZnO nanoparticles are co-doped with silver (Ag) and cobalt (Co). The present disclosure also discloses a method of detecting meloxicam using an electroanalytical sensor. The electroanalytical sensor comprises a carbon electrode, the carbon electrode comprising zinc oxide (ZnO) nanoparticles co-doped with silver (Ag) and cobalt (Co). The method of detecting meloxicam comprises the step of positioning a liquid droplet, comprising solvent, to be tested on a surface of the electrode. The method further comprises receiving a voltammetric response from the electrode, and analysing the voltammetric response to determine if meloxicam is present in the liquid droplet.