Preliminary Study of Electrochemical Behavior of Ketjen Black Modified Glassy Carbon Electrode (GCE) in Dopamine Solution
| Authors | Firman Ardyansyah, Fredy Kurniawan |
| Affiliations |
Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Sukolilo, 60111 Surabaya, Indonesia |
| Е-mail | firman.ardyansyah25@gmail.com |
| Issue | Volume 13, Year 2021, Number 3 |
| Dates | Received 21 March 2021; revised manuscript received 15 June 2021; published online 25 June 2021 |
| Citation | Firman Ardyansyah, Fredy Kurniawan, J. Nano- Electron. Phys. 13 No 3, 03027 (2021) |
| DOI | https://doi.org/10.21272/jnep.13(3).03027 |
| PACS Number(s) | 81.05.U, 82.80.Fk |
| Keywords | Modified electrode, Ketjen black (2) , Electroanalysis, Dopamine. |
| Annotation |
Modification of a glassy carbon electrode (GCE) using Ketjen black has been done. Ketjen black (KB) was attached to the GCE surface employing the drop-casting method with the support of sodium cholate as a surfactant. The measurement was performed using cyclic voltammetry. The preliminary study of the electrochemical behavior of KB-modified GCE was observed using 1 mM dopamine in acetate buffer pH 4 as a supporting electrolyte. The result shows that the anodic peak current of a modified GCE is higher than that of a GCE without modification. It indicates that KB gives a synergy effect for GCE to increase the anodic peak current of dopamine measurement. In selectivity studies, modification of a GCE using KB can improve the selectivity of the sensor. An unmodified GCE is selective for dopamine, uric acid, ascorbic acid, and glucose. After modification of the surface, a GCE is only selective for dopamine. In electrochemical behavior study, five repetitions of measurement resulted in a decrease in the anodic peak current. It indicates that the oxidation product of dopamine molecules is attached strongly to the surface of the KB-modified GCE surface during voltametric measurement causing a decrease in the anodic peak current. |
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