Development of a Highly Sensitive Electrochemical Sensor Using Sm2CuZrO6 Double Perovskite as an Electrocatalyst for Determination of Risperidone Antipsychotic Drug in Tablet Samples

In this study, the preparation of Sm₂CuZrO₆ double perovskites was carried out through the utilization of a sol-gel technique. The Sm₂CuZrO₆ displayed notable conductivity, impressive electrocatalytic activity, and rapid electron transfer. The monitoring of risperidone (RIS) in tablet samples is greatly influenced by these properties. Various techniques for structural and morphological characterization were employed to confirm the formation of Sm₂CuZrO₆. The electrochemical properties of Sm₂CuZrO₆ were assessed through utilization of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV). Interestingly, the Sm₂CuZrO₆ exhibited a remarkable wide linear range of 50-500 nM, along with a detection limit of 10.62 nM. Notably, it demonstrated a sensitivity of 0.4038 μA μM^-1 cm^-2. The constructed sensor demonstrated noteworthy selectivity, stability, and repeatability. To assess the practicality of RIS, its performance was monitored in the tablet sample, resulting in satisfactory recoveries.