Development of MoS2 flower-adorned pencil graphite electrode for electro-kinetic investigations and voltammetric quantification of anti-epileptic drug levetiracetam

Abstract

The fast, accurate, and affordable determination of anti-epileptic drug levetiracetam (LEV) is the need of time for human health. In this study, an electrochemical sensor platform was proposed for the costeffective and sensitive determination of the levetiracetam based on molybdenum sul de nano-owers adorned pencil graphite electrode (MoS 2 /PGE). The nano-owers of MoS 2 were prepared by a costeffective one-step facile hydrothermal method and the morphology of synthesized MoS 2 micro-owers was characterized via FESEM, XRD, and EDS techniques. Under the optimized experimental conditions, cyclic, linear sweep, and square wave voltammograms of LEV were recorded. The diffusion-controlled electrochemical oxidation of LEV produced one well-de ned irreversible peak in all voltammograms. The various electro-kinetics parameters like diffusion coe cient (D o =1.41×10 − 5 cm 2 s − 1 ), heterogeneous rate constant (K h =9.04×10 − 4 cms − 1 ), electron transfer coe cient (α = 0.66), the surface area of the fabricated electrode (A = 0.0767 cm 2 ) and surface coverage (Γ o = 2.98×10 − 11 molcm − 2 ) were evaluated for the oxidation of LEV at MoS 2 /PGE. The square wave stripping voltammetry (SWSV) method was optimized for the quanti cation of LEV in pharmaceutical samples. The oxidative peak current in SWSV methods varies linearly with LEV concentration within the range 72.0 to 130.0 µmolL − 1 with detection limit (LOD) value of 14.20 µmolL − 1 . The proposed MoS 2 /PGE platform provides a sensitive, low cost and ecofriendly tool for the rapid detection of LEV in clinical samples.

A sensitive electrochemical DNA biosensor for determination of Capecitabine anticancer drug based on ss-DNA/RGO/MoS2/CPE electrode

“…Moreover, these methods are inherently cost-effective, as they generally require simpler instrumentation and offer a rapid analysis turnaround. Overall, the versatility, sensitivity, selectivity, and cost-effectiveness of electrochemical methods position them as powerful tools for drug determination, contributing signi cantly to advancements in pharmaceutical research and development [9][10][11][12][13].…”