title: Electrochemical Selective and Simultaneous Detection of Diclofenac and Ibuprofen in Aqueous Solution Using HKUST-1 Metal-Organic Framework-Carbon Nanofiber Composite Electrode.
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.
authors.affiliation: Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazul 24, Timisoara 300223, Romania. sorinailies@acad-icht.tm.edu.ro.
authors.forename: Sorina
authors.initials: S
authors.lastname: Motoc
authors.affiliation: Politehnica University of Timisoara, P-ta Victoriei no.2, Timisoara 300006, Romania. florica.manea@upt.ro.
authors.forename: Florica
authors.initials: F
authors.lastname: Manea
authors.affiliation: S.C. DATCOMP S.R.L, Str.Dr.Iosif Nemoianu nr 16/4, Timisoara 300011, Romania. adriana.iacob@datcomp.ro.
authors.forename: Adriana
authors.initials: A
authors.lastname: Iacob
authors.affiliation: Materials for Energy Conversion and Storage, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, Delft 2626 BL, The Netherlands. amjoaristi@yahoo.com.
authors.forename: Alberto
authors.initials: A
authors.lastname: Martinez-Joaristi
authors.affiliation: Materials for Energy Conversion and Storage, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, Delft 2626 BL, The Netherlands. j.gascon@tudelft.nl.
authors.forename: Jorge
authors.initials: J
authors.lastname: Gascon
authors.affiliation: Politehnica University of Timisoara, P-ta Victoriei no.2, Timisoara 300006, Romania. aniela.pop@upt.ro.
authors.forename: Aniela
authors.initials: A
authors.lastname: Pop
authors.affiliation: Materials for Energy Conversion and Storage, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, Delft 2626 BL, The Netherlands. J.Schoonman@tudelft.nl.
authors.forename: Joop
authors.initials: J
authors.lastname: Schoonman
keywords: chronoamperometry; cyclic voltammetry; diclofenac; electrochemical selective and simultaneous detection; ibuprofen; metal-organic framework-carbon nanofiber composite electrode; multiple-pulsed amperometry