Abstract

This work studied a new carbon paste electrode modified with peony-like CuO : Tb3+ nanostructure (P-L CuO : Tb3+ NS/CPE) for electrochemical detection of sumatriptan and naproxen using cyclic voltammetry, chronoamperometry and differential pulse voltammetry. Based on the findings, there was an improvement in the voltammetric behavior of sumatriptan and naproxen on the P-L CuO : Tb3+ NS/CPE surface when comparing with the bare CPE. The correlation of oxidation currents with the pH value, concentration and sweep rate of supporting electrolyte were determined for the optimization of conditions to detect the sumatriptan and naproxen. The surfaces of modified and unmodified electrodes were characterized as well. The diffusion-control processes were confirmed on the basis of anodic peak findings. The results also revealed a two-electron transfer process. The sumatriptan and naproxen were co-detected via the modified electrode, with a range of 0.01-800 mu M and 0.01-700 mu M respectively, and a detection limit of 3.3 nM and 2.7 nM, sequentially. An accuracy was found by the differential pulse voltammetry for co-detection of these two drugs in pharmaceutical preparations and pathological specimens. In conclusion, we suggest the proposed approach for electrical determinations in the management of environmental contamination and industrial quality because of its unique properties like facile sample preparation, and appreciable sensitivity, repeatability and reproducibility.