Voltammetric determination of antibacterial drug gemifloxacin in solubilized systems at multi-walled carbon nanotubes modified glassy carbon electrode

R. Jain Rajeev, Jahangir Ahmad Rather

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74 Citations (Scopus)


A sensitive electroanalytical method for determination of gemifloxacin in pharmaceutical formulation has been investigated on the basis of the enhanced electrochemical response at multi-walled carbon nanotubes modified glassy carbon electrode in the presence of CTAB. Solubilized system of different surfactants including SDS, Tween-20 and CTAB were taken for the study of electrochemical behaviour of gemifloxacin at modified electrode. The reduction peak current increases in the presence of CTAB while other surfactants show opposite effect. The modified electrode exhibits catalytic activity, high sensitivity, stability and is applicable over wide range of concentration for the determination of gemifloxacin. The mechanism of electrochemical reduction of gemifloxacin has been proposed on the basis of CV, SWV, DPV and coulometeric techniques. The proposed squarewave voltammetric method shows linearity over the concentration range 2.47-15.5 μg/mL. The achieved limits of detection (LOD) and quantification (LOQ) are 0.90. ng/mL and 3.0. ng/mL respectively.

Original languageEnglish
Pages (from-to)340-346
Number of pages7
JournalColloids and Surfaces B: Biointerfaces
Issue number2
Publication statusPublished - Apr 1 2011



  • CTAB (cetyltrimethyl ammonium bromide)
  • Gemifloxacin (GMX)
  • Multi-walled carbon nanotubes modified glassy carbon electrode (MWCNTs-GCE)
  • Solubilized systems
  • Voltammetric determination

ASJC Scopus subject areas

  • Biotechnology
  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

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