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Electrochemical determination of clozapine on MWCNTs/new coccine doped ppy modified GCE: An experimental design approach

Shahrokhian, S ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.bioelechem.2012.10.002
  3. Publisher: 2013
  4. Abstract:
  5. The electrooxidation of clozapine (CLZ) was studied on the surface of a glassy carbon electrode (GCE) modified with a thin film of multiwalled carbon nanotubes (MWCNTs)/new coccine (NC) doped polypyrrole (PPY) by using linear sweep voltammetry (LSV). The pH of the supporting electrolyte (D), drop size of the cast MWCNTs suspension (E) and accumulation time of CLZ on the surface of modified electrode (F) was considered as effective experimental factors and the oxidation peak current of CLZ was selected as the response. By using factorial-based response-surface methodology, the optimum values of factors were obtained as 5.44, 10 μL and 300 s for D, E and F respectively. Under the optimized conditions, a significant increase (~14 times) was observed in the anodic peak current of CLZ on the surface of the modified electrode relative to the bare GCE. Oxidation peak currents increased linearly with CLZ concentration in the range of 0.01-5.00 μM with a detection limit of 3.00 nM. The RSD value for the peak current of CLZ was obtained as 4.5%. The modified electrode with high sensitivity, stability and good reproducibility was used for the determination of CLZ concentration in pharmaceutical and clinical preparations with satisfactory results
  6. Keywords:
  7. Response surface methodology ; Chemical detection ; Electrooxidation ; Multiwalled carbon nanotubes (MWCN) ; Polypyrroles ; Electrochemical determination ; Experimental design approaches ; Glassy carbon electrodes ; Linear sweep voltammetry ; Multiwalled carbon nanotube (MWCNTs) ; New coccine ; Glass membrane electrodes ; Multi walled nanotube ; Azo compound ; Carbon nanotube ; Drug ; Neuroleptic agent ; Polymer ; Polypyrrole ; Ponceau 4r ; Pyrrole derivative ; Chemical structure ; Cyclic potentiometry ; Electrochemical analysis ; Electrode ; Experimental design ; Limit of detection ; Noise ; Oxidation ; PH ; Polymerization ; Potentiometry ; Reproducibility ; Response surface method ; Blood ; Chemistry ; Evaluation ; Human ; Instrumentation ; Oxidation reduction reaction ; Ultrastructure ; Antipsychotic Agents ; Azo Compounds ; Carbon ; Clozapine ; Electrochemical Techniques ; Electrodes ; Humans ; Nanotubes, Carbon ; Oxidation-Reduction ; Pharmaceutical Preparations ; Polymers ; Pyrroles ; Sensitivity and Specificity
  8. Source: Bioelectrochemistry ; Volume 90 , 2013 , Pages 36-43 ; 15675394 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1567539412001661