Voltammetric Determination of Guanine on the Electrode Modified by Gold Deposit and Nafion Film
Electrodeposited gold and Nafion-gold composite on the surface of glassy carbon electrodes (GCE) have shown electrocatalytic activity during guanine oxidation. In comparison with the unmodified electrode, decreasing of the oxidation potential by 100 mV and increasing of the current of organic compou...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Kazan Federal University
2016-09-01
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| Series: | Учёные записки Казанского университета: Серия Естественные науки |
| Subjects: | |
| Online Access: | http://kpfu.ru/portal/docs/F947860695/158_3_est_4.pdf |
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| Summary: | Electrodeposited gold and Nafion-gold composite on the surface of glassy carbon electrodes (GCE) have shown electrocatalytic activity during guanine oxidation. In comparison with the unmodified electrode, decreasing of the oxidation potential by 100 mV and increasing of the current of organic compound oxidation have been observed. When the Nafion (NF) film is applied to the surface of the glassy carbon electrode with electrodeposited gold, a five-fold increase of guanine oxidation current has been achieved compared to its oxidation on the modified electrode without the NF film.
Conditions have been found for electrodeposition of gold on the surface of the glassy carbon electrode, including that one covered with the NF film, as well as for registration of the maximum catalytic current on these electrodes. Linear dependence of the electrocatalytic response of the modified electrode from the guanine concentration has been observed in the range from 5·10–6 to 5·10–3 mol·L–1 (for Au GCE) and from 5·10–7 to 5·10–3 mol·L–1 (for NF-Au GCE). |
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| ISSN: | 1815-6169 2500-218X |