(2018) Highly Sensitive Determination of Theophylline Based on Graphene Quantum Dots Modified Electrode. International Journal of Electrochemical Science. pp. 2448-2461. ISSN 1452-3981
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Abstract
In this study we introduce a novel modification for the surface of screen-printed electrode (SPE) by graphene quantum dot (GQD) in order to be used in the determination and detection of theophylline. An uncomplicated technique was employed to stabilize GQD on screen-printed electrode. Function evaluation of the GQD modified SPE (GQD/SPE) by cyclic voltammetry revealed enhanced electroactivity in the oxidation of theophylline in buffer solution of phosphate. Differential-pulse voltammetry (DPV), cyclic voltammetry (CV) and chronoamperometry were applied to determine the sensitivity of GQD/SPE toward detection of theophylline. A wide linear concentration range of 1.0-700.0 mu M and detection limit of 0.2 mu M (S/N = 3) obtained under optimized conditions. This sensor was successful in the assessment of theophylline in real samples.
| Item Type: | Article |
|---|---|
| Keywords: | Theophylline Graphite screen-printed electrode Graphene quantum dots Modified electrode screen-printed electrode carbon-paste electrode superparamagnetic fe3o4 nanoparticles voltammetric determination electrochemical sensor oxide nanoparticles ascorbic-acid uric-acid tungstate nanoparticles selective determination Electrochemistry |
| Divisions: | |
| Page Range: | pp. 2448-2461 |
| Journal or Publication Title: | International Journal of Electrochemical Science |
| Journal Index: | ISI |
| Volume: | 13 |
| Number: | 3 |
| Identification Number: | https://doi.org/10.20964/2018.03.09 |
| ISSN: | 1452-3981 |
| Depositing User: | مهندس مهدی شریفی |
| URI: | http://eprints.mubam.ac.ir/id/eprint/569 |
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