Application of carbon nanoparticle/chitosan modified electrode for the square-wave adsorptive anodic striping voltammetric determination of Niclosamide

Ghalkhani, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.elecom.2009.10.037
  3. Publisher: 2010
  4. Abstract:
  5. A new modified electrode formed by carbon nanoparticle/chitosan film (CNP/CS) was used for electrocatalytic reduction of Niclosamide (NA). The electrochemical behavior of NA at the CNP/CS modified electrode was investigated in detail by the means of cyclic voltammetry. The reduction mechanism of NA, corresponds to the redox chemistry of nitro group, was thoroughly investigated. The effect of the experimental parameters e.g. potential and time of accumulation, pH of the buffered solutions and potential sweep rate on the response of the electrode was studied. The prepared electrode showed high stability and uniformity in the composite film, short response time, good reproducibility and an excellent catalytic activity toward the electro-reduction of NA leading to a significant improvement in response sensitivity. The square-wave adsorptive anodic stripping voltammetry (SWAASV) was used as an efficient method for the determination of NA. Under the optimal conditions, the modified electrode showed a wide linear response to the concentration of NA in the range of 0.01-2 μM with a detection limit of 7.7 nM. The prepared electrode was successfully applied for the determination of NA in pharmaceutical and clinical samples and satisfactory results are obtained
  6. Keywords:
  7. Anodic stripping voltammetry ; Chitosan ; Niclosamide ; Anodic stripping voltammetry ; Buffered solutions ; Carbon nanoparticle ; Catalytic activity ; Clinical samples ; Concentration of ; Detection limits ; Efficient method ; Electro reduction ; Electrocatalytic reduction ; Electrochemical behaviors ; Experimental parameters ; High stability ; Linear response ; Modified electrodes ; Nitro group ; Optimal conditions ; Potential sweep rate ; Redox chemistry ; Reduction mechanisms ; Reproducibilities ; Response sensitivity ; Short response time ; Square wave voltammetry ; Square-wave ; Voltammetric determination ; Bioelectric phenomena ; Chitin ; Composite films ; Cyclic voltammetry ; Drug products ; Electrocatalysis ; Film preparation ; Fluorine containing polymers ; Nanoparticles ; PH effects ; Reduction ; Stripping (dyes) ; Electrochemical electrodes
  8. Source: Electrochemistry Communications ; Volume 12, Issue 1 , 2010 , Pages 66-69 ; 13882481 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1388248109005335