title: Amperometric ascorbic acid sensor based on doped ferrites nanoparticles modified glassy carbon paste electrode.
abstract: In this study, a novel electrochemical sensor for quantification of ascorbic acid with amperometric detection in physiological conditions was constructed. For this purpose, cobalt and nickel ferrites were synthesized using microwave and ultrasound assistance, characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray powder diffraction (XRPD), and used for modification of glassy carbon paste electrode (GCPE). It was shown that introducing these nanoparticles to the structure of GCPE led to increasing analytical performance. Co ferrite modified GCPE (CoFeGCPE) showed better characteristics toward ascorbic acid sensing. The limit of detection (LOD) obtained by sensor was calculated to be 0.0270 mg/L, with linear range from 0.1758 to 2.6010 mg/L. This sensor was successfully applied for practical analysis, and the obtained results demonstrated that the proposed procedure could be a promising replacement for the conventional electrode materials and time-consuming and expensive separation methods.
authors.affiliation: Faculty of Chemistry, University of Belgrade, 11000 Belgrade, Serbia.
authors.forename: Teodora
authors.initials: T
authors.lastname: Dimitrijević
authors.affiliation: Faculty of Geology, University of Belgrade, 11000 Belgrade, Serbia.
authors.forename: Predrag
authors.initials: P
authors.lastname: Vulić
authors.affiliation: Faculty of Chemistry, University of Belgrade, 11000 Belgrade, Serbia.
authors.forename: Dragan
authors.initials: D
authors.lastname: Manojlović
authors.affiliation: Faculty of Chemistry, University of Belgrade, 11000 Belgrade, Serbia.
authors.forename: Aleksandar S
authors.initials: AS
authors.lastname: Nikolić
authors.affiliation: Innovation Center of the Faculty of Chemistry, University of Belgrade, 11000 Belgrade, Serbia. Electronic address: dalibors@chem.bg.ac.rs.
authors.forename: Dalibor M
authors.initials: DM
authors.lastname: Stanković
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D002244:Carbon; D055664:Electrochemical Techniques; D004566:Electrodes; D005290:Ferric Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D005898:Glass; D008872:Microwaves; D053758:Nanoparticles; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D000069453:Ultrasonic Waves
chemical_list: D005290:Ferric Compounds; C550717:nickel ferrite; D002244:Carbon; D009532:Nickel; D001205:Ascorbic Acid
keywords: Amperometry; Cobalt and nickel ferrite; Microwave synthesis; SEM; XRPD