(2019) Application of Fe3O4@SiO2/GO nanocomposite for sensitive and selective electrochemical sensing of tryptophan. Journal of Electrochemical Science and Engineering. pp. 45-53. ISSN 1847-9286
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Abstract
A simple strategy for determination of tryptophan (TRP) based on Fe3O4@SiO2/GO nano-composite modified graphite screen printed electrode (Fe3O4@SiO2/GO/SPE) is reported. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to characterize the performance of the sensor. The Fe3O4@SiO2/GO/PE displayed excellent electrochemical catalytic activities. The oxidation overpotentials of tryptophan decreased significantly and its oxidation peak current increased dramatically at Fe3O4@SiO2/GO/SPE. Under the optimized experimental conditions tryptophan showed linear response over the range of 1.0-400.0 mu M. The lower detection limit was found to be 0.2 mu M for tryptophan. The practical application of the modified electrode was demonstrated by measuring the concentration of tryptophan in real samples.
| Item Type: | Article |
|---|---|
| Keywords: | Tryptophan Fe3O4@SiO2/GO nanocomposite graphite screen printed electrodes voltammetry carbon-paste electrode voltammetric determination ascorbic-acid uric-acid oxide nanoparticles dopamine graphene sensor carbidopa levodopa Electrochemistry |
| Divisions: | |
| Page Range: | pp. 45-53 |
| Journal or Publication Title: | Journal of Electrochemical Science and Engineering |
| Journal Index: | ISI |
| Volume: | 9 |
| Number: | 1 |
| Identification Number: | https://doi.org/10.5599/jese.576 |
| ISSN: | 1847-9286 |
| Depositing User: | مهندس مهدی شریفی |
| URI: | http://eprints.mubam.ac.ir/id/eprint/517 |
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