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Fabrication and optimization of polypyrrole/cerium oxide/glassy carbon sensing platform for the electrochemical detection of flupirtine.
- Source :
-
Journal of Applied Electrochemistry . Jun2020, Vol. 50 Issue 6, p655-672. 18p. 1 Black and White Photograph, 3 Diagrams, 5 Charts, 9 Graphs. - Publication Year :
- 2020
-
Abstract
- In spite of single nanomaterials, nanocomposites have come to be the superior modifying materials for electrochemical sensing. Herein, the highly sophisticated and sensitive voltammetric sensor of polypyrrole/cerium oxide/glassy carbon electrode (Ppyr/CeO2/GCE) has been fabricated for the electrochemical analysis of flupirtine maleate (FPM). Prior to the fabrication, the synthetic Ppyr/CeO2 material and its constituents viz., Ppyr and CeO2 were spectrally characterized by FTIR, XRD, and SEM to confirm the successful synthesis. After the fabrication of the Ppyr/CeO2/GCE sensor, it together with its corresponding forms i.e., CeO2/GCE and Ppyr/GCE including bare GCE was characterized by voltammetry and electrochemical impedance spectroscopy (EIS). The electrode characteristics such as charge transfer resistance, heterogeneous electron transfer (HET) rate constant, ( k eff 0 ) and surface area suggest that the designed electrochemical sensor has got the conductivity (sensitivity) par excellence as compared to CeO2/GCE, Ppyr/GCE and bare GCE. The fabricated probe after characterization was optimized for the detection of the FPM by voltammetry and found to show a direct correlation between the oxidation current and the FPM concentration varying from 100 ng mL−1 to 500 ng mL−1 having correlation coefficient (r2) of 0.9940. By measuring the calibration curve, the fabricated Ppyr/CeO2/GCE sensor was found to reach the minimum limit of detection (LOD) i.e., 26.76 ng mL−1 and minimum limit of quantification (LOQ) i.e., 89.20 ng mL−1, for FPM, thereby showing the sensitivity par excellence in terms of conductivity. Fabrication of Ppyr/CeO2/GCE voltammetric sensor [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0021891X
- Volume :
- 50
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 143360045
- Full Text :
- https://doi.org/10.1007/s10800-020-01418-z