title: Electrochemical studies and square-wave voltammetric determination of fenofibrate in pharmaceutical formulations.
abstract: The electrochemical reduction of fenofibrate at a hanging mercury drop electrode (HMDE) was investigated by cyclic voltammetry, square-wave voltammetry, and chronoamperometry. Different buffer solutions were used over a wide pH range (3.0-10.0). The best definition of the analytical signals was found in borate buffer (pH 9.0)-tetrabutylammonium iodide mixture containing 12.5% (v/v) methanol at -1.2 V (versus Ag/AgCl). According to cyclic voltammetric studies, the reduction was irreversible and diffusion controlled. The diffusion coefficient was 2.38x10(-6) cm2 s(-1) as determined by chronoamperometry. Under optimized conditions of square-wave voltammetry, a linear relationship was obtained between 0.146-4.96 microg mL(-1) of fenofibrate with a limit of detection of 0.025 microg mL(-1). Validation parameters such as sensitivity, accuracy, precision, and recovery were evaluated. The proposed method was applied to the determination of fenofibrate in pharmaceutical formulations. The results were compared with those obtained by a published high-performance liquid chromatography method. No difference was found statistically.
authors.affiliation: Department of Analytical Chemistry, Faculty of Pharmacy, Hacettepe University, Sihhiye, 06100 Ankara, Turkey.
authors.forename: Ceren
authors.initials: C
authors.lastname: Yardimci
authors.forename: Nuran
authors.initials: N
authors.lastname: Ozaltin
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D011345:Fenofibrate / Q000032:analysis*; D015394:Molecular Structure; D004364:Pharmaceutical Preparations / Q000737:chemistry*
chemical_list: D004364:Pharmaceutical Preparations; D011345:Fenofibrate