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Sensors 2016, 16(10), 1719; doi:10.3390/s16101719

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

1
Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazul 24, Timisoara 300223, Romania
2
Politehnica University of Timisoara, P-ta Victoriei no.2, Timisoara 300006, Romania
3
S.C. DATCOMP S.R.L, Str.Dr.Iosif Nemoianu nr 16/4, Timisoara 300011, Romania
4
Materials for Energy Conversion and Storage, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, Delft 2626 BL, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 1 August 2016 / Revised: 23 September 2016 / Accepted: 27 September 2016 / Published: 17 October 2016
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [3467 KB, uploaded 17 October 2016]   |  

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. View Full-Text
Keywords: electrochemical selective and simultaneous detection; metal-organic framework-carbon nanofiber composite electrode; ibuprofen; diclofenac; cyclic voltammetry; chronoamperometry; multiple-pulsed amperometry electrochemical selective and simultaneous detection; metal-organic framework-carbon nanofiber composite electrode; ibuprofen; diclofenac; cyclic voltammetry; chronoamperometry; multiple-pulsed amperometry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Motoc, S.; Manea, F.; Iacob, A.; Martinez-Joaristi, A.; Gascon, J.; Pop, A.; Schoonman, J. Electrochemical Selective and Simultaneous Detection of Diclofenac and Ibuprofen in Aqueous Solution Using HKUST-1 Metal-Organic Framework-Carbon Nanofiber Composite Electrode. Sensors 2016, 16, 1719.

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