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Electrochemical Detection of Codeine in Pharmaceutical Tablets Using a Tungsten Oxide Nanoparticles and Carbon Nanotubes Modified Electrode

International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 11, Issue: 8, Page: 6862-6872
2016
  • 16
    Citations
  • 0
    Usage
  • 19
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    16
    • Citation Indexes
      16
  • Captures
    19

Article Description

An electrochemical sensor with a glassy carbon electrode (GCE) decorated with a composite of carbon nanotubes (CNTs) and tungsten oxide (WO 3 ) was prepared for the quantification of codeine. The crystal structure of the CNT-WO 3 composite was characterized by X-ray powder diffraction (XRD) and the morphology by scanning electron microscopy (SEM). In comparison with bare GCE, WO 3 modified GCE and CNT modified GCE, the CNT-WO 3 composite modified GCE revealed a well-defined oxidation of codeine. Besides, the current response exhibited a remarkable enhancement during the oxidation process. The current response of codeine oxidation peak is linearly related with the codeine concentration ranging from 0.005 to 20 μM with the detection limit of 0.02 μM. The improved voltametric behaviour and long-time stability of the electrochemical sensor make it successfully applied for codeine determination in the medicament and human urine.

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