Cobalt vanadate intertwined in carboxylated multiple-walled carbon nanotubes for simultaneous electrochemical detection of ascorbic acid, dopamine and uric acid.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 2984816R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3573 (Electronic) Linking ISSN: 00399140 NLM ISO Abbreviation: Talanta Subsets: MEDLINE
    • Publication Information:
      Publication: Amsterdam : Elsevier
      Original Publication: Oxford : Pergamon Press
    • Subject Terms:
      Nanotubes, Carbon*/chemistry ; Ascorbic Acid*/analysis ; Ascorbic Acid*/chemistry ; Ascorbic Acid*/urine ; Ascorbic Acid*/blood ; Dopamine*/analysis ; Dopamine*/urine ; Dopamine*/blood ; Uric Acid*/analysis ; Uric Acid*/blood ; Uric Acid*/urine ; Uric Acid*/chemistry ; Cobalt*/chemistry ; Vanadates*/chemistry ; Electrochemical Techniques*/methods; Humans ; Electrodes ; Limit of Detection
    • Abstract:
      Low-cost transition metal vanadate-based electrochemical sensors have attracted a lot of attention recently. A cobalt vanadate and carboxylated multi-walled carbon nanotube composite (CoV/MWCNTs-COOH) was prepared by an ultrasonic-assisted assembly method. The uniform and dense MWCNTs-COOH attached to the surface of CoV not only combines the large surface area and superior conductivity of MWCNTs-COOH with the excellent electrochemical activity of CoV, but also enhances the redox reaction between CoV/MWCNTs-COOH composite and the analyte through synergistic effect of hydrogen bonding and electrostatic interaction. The electrochemical behaviors of CoV/MWCNTs-COOH composite modified glassy carbon electrode (CoV/MWCNTs-COOH/GCE) were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). The simultaneous electrochemical sensing of ascorbic acid (AA), dopamine (DA) and uric acid (UA) on CoV/MWCNTs-COOH/GCE possesses good peak current signals with well-defined peak potentials. The linear ranges of AA, DA, and UA at CoV/MWCNTs-COOH/GCE are 1.0-100.0 μM, and the limits of detection (LODs; S/N = 3) are 0.4 μM, 0.03 μM, and 0.1 μM, respectively. The practicality of the designed sensor was further confirmed by the good recoveries obtained in the simultaneous measurement of actual samples including fetal bovine serum, human serum, urine, and Vitamin C tablets. Overall, the developed electrochemical sensor shows potential therapeutic applications for simultaneous determination of AA, DA and UA in biological fluids.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Ascorbic acid; Carboxylated multi-walled carbon nanotube; Cobalt vanadate; Dopamine; Electrochemical sensing; Uric acid
    • Accession Number:
      0 (Nanotubes, Carbon)
      PQ6CK8PD0R (Ascorbic Acid)
      VTD58H1Z2X (Dopamine)
      268B43MJ25 (Uric Acid)
      3G0H8C9362 (Cobalt)
      3WHH0066W5 (Vanadates)
    • Publication Date:
      Date Created: 20241015 Date Completed: 20241119 Latest Revision: 20241119
    • Publication Date:
      20241119
    • Accession Number:
      10.1016/j.talanta.2024.127038
    • Accession Number:
      39406089