1. Enhanced amperometric detection of paracetamol by immobilized cobalt ion on functionalized MWCNTs - Chitosan thin film
- Author
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Mohd Rafie Johan, Shamima Akhter, Nadzirah Sofia Anuar, Samira Bagheri, Wan Jefrey Basirun, Magaji Ladan, Md. Shalauddin, and Yatimah Alias
- Subjects
Materials science ,Antipyretics ,Biophysics ,chemistry.chemical_element ,Metal Nanoparticles ,02 engineering and technology ,Biosensing Techniques ,01 natural sciences ,Biochemistry ,Nanocomposites ,Spectroscopy, Fourier Transform Infrared ,Humans ,Molecular Biology ,Acetaminophen ,Detection limit ,Chitosan ,Nanocomposite ,Nanotubes, Carbon ,010401 analytical chemistry ,Cell Biology ,Cobalt ,Electrochemical Techniques ,Analgesics, Non-Narcotic ,Hydrogen-Ion Concentration ,021001 nanoscience & nanotechnology ,Amperometry ,0104 chemical sciences ,Electrochemical gas sensor ,Dielectric spectroscopy ,chemistry ,Dielectric Spectroscopy ,Microscopy, Electron, Scanning ,Differential pulse voltammetry ,Cyclic voltammetry ,0210 nano-technology ,Nuclear chemistry ,Tablets - Abstract
In the present study, a nanocomposite of f-MWCNTs-chitosan-Co was prepared by the immobilization of Co(II) on f-MWCNTs-chitosan by a self-assembly method and used for the quantitative determination of paracetamol (PR). The composite was characterized by field emission scanning electron microscopy (FESEM) and energy dispersive x-ray analysis (EDX). The electroactivity of cobalt immobilized on f-MWCNTs-chitosan was assessed during the electro-oxidation of paracetamol. The prepared GCE modified f-MWCNTs/CTS-Co showed strong electrocatalytic activity towards the oxidation of PR. The electrochemical performances were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). Under favorable experimental conditions, differential pulse voltammetry showed a linear dynamic range between 0.1 and 400 μmol L−1 with a detection limit of 0.01 μmol L−1 for the PR solution. The fabricated sensor exhibited significant selectivity towards PR detection. The fabricated sensor was successfully applied for the determination of PR in commercial tablets and human serum sample.
- Published
- 2018