Electrochemical Selective and Simultaneous Detection of Diclofenac and Ibuprofen in Aqueous Solution Using HKUST-1 Metal-Organic Framework-Carbon Nanofiber Composite Electrode

Sorina Motoc, Florica Manea, Adriana Iacob, Alberto Martinez-Joaristi, J. Gascon, Aniela Pop, Joop Schoonman

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15 Citations (Scopus)
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Abstract

In this study, the detection protocols for the individual, selective, and simultaneous determination of ibuprofen (IBP) and diclofenac (DCF) in aqueous solutions have been developed using HKUST-1 metal-organic framework-carbon nanofiber composite (HKUST-CNF) electrode. The morphological and electrical characterization of modified composite electrode prepared by film casting was studied by scanning electronic microscopy and four-point-probe methods. The electrochemical characterization of the electrode by cyclic voltammetry (CV) was considered the reference basis for the optimization of the operating conditions for chronoamperometry (CA) and multiple-pulsed amperometry (MPA). This electrode exhibited the possibility to selectively detect IBP and DCF by simple switching the detection potential using CA. However, the MPA operated under optimum working conditions of four potential levels selected based on CV shape in relation to the potential value, pulse time, and potential level number, and order allowed the selective/simultaneous detection of IBP and DCF characterized by the enhanced detection performance. For this application, the HKUST-CNF electrode exhibited a good stability and reproducibility of the results was achieved.

Original languageEnglish
Article number1719
Number of pages12
JournalSensors
Volume16
Issue number10
DOIs
Publication statusPublished - 17 Oct 2016

Keywords

  • Chronoamperometry
  • Cyclic voltammetry
  • Diclofenac
  • Electrochemical selective and simultaneous detection
  • Ibuprofen
  • Metal-organic framework-carbon nanofiber composite electrode
  • Multiple-pulsed amperometry

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