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- Title
Voltammetric Quantification of D-penicillamine by Using a Carbon Paste Electrode Modified with WO<sub>3</sub> Nanorods and Ionic Liquid as an Efficient Electrochemical Sensing Platform.
- Authors
Tajik, Somayeh; Jahani, Peyman Mohammadzadeh
- Abstract
In this work, the electrochemical behavior and sensitive voltammetric determination of D-penicillamine are described by using a carbon paste electrode modified with WO3 nanorods and ionic liquid. The as-synthesized WO3 nanorods were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Cyclic voltammetric measurements showed that D-penicillamine was irreversibly oxidized at WO3 nanorods/ionic liquid/carbon paste electrode at 710 mV in pH 7.0 phosphate buffer solution. The peak current of D-penicillamine was increased approximately 6.2 fold at WO3 nanorods/ionic liquid/carbon paste electrode compared to unmodified carbon paste electrode due to a good electrocatalytic efficiency of WO3 nanorods and ionic liquid. A wide linear range response between oxidation peak current and D-penicillamine concentration (0.08–235.0 µM) was observed using differential pulse voltammetry. The limit of detection for D-penicillamine on WO3 nanorods/ionic liquid/carbon paste electrode is found to be 0.03 µM. Studies conducted in the analysis of D-penicillamine capsule and urine samples confirmed that the developed sensor exhibits good applicability for accurate and sensitive voltammetric determination of D-penicillamine in real samples.
- Subjects
X-ray emission spectroscopy; CARBON electrodes; IONIC liquids; NANORODS; FOURIER transform infrared spectroscopy; FIELD emission electron microscopy
- Publication
Topics in Catalysis, 2024, Vol 67, Issue 9-12, p853
- ISSN
1022-5528
- Publication type
Article
- DOI
10.1007/s11244-023-01874-9