Facile fabrication of a novel 3D rose like lanthanum doped zirconia decorated reduced graphene oxide nanosheets: An efficient electro-catalyst for electrochemical reduction of futuristic anti-cancer drug salinomycin during pharmacokinetic study.

An innovative electrochemical nanoprobe, for analysis of salinomycin (SAL), was proposed. The nanoprobe based on decoration of glassy carbon electrode (GCE) with 3D rose like La³⁺@ ZrO₂ supported on reduced graphene oxide (RGO) nanosheets. The 3D rose like La³⁺@ ZrO₂ was synthesized via sintering process. The successful decoration of 3D rose like La³⁺@ ZrO₂ on the surface of RGO was characterized using different spectroscopic and analytical techniques. The obtained voltammetric results confirmed the good electrochemical performance of 3D rose like La³⁺@ ZrO₂ in terms of lower peak potential (E_pc) and higher cathodic current (I_pc). Moreover, the modified nanoprobe showed wide linearity range (0.34-115 × 10^-8 M), lower detection limit (0.11 × 10^-8 M) and higher selectivity. Besides, the nanocomposite showed good applicability for analysis of SAL in biological fluids and during pharmacokinetic evaluation in rabbit plasma. The obtained results opens a new venue for the determination of futuristic drug, SAL, during pharmacokinetic and pharmacodynamics studies.