dc.contributor | Universidade Estadual Paulista (UNESP) | |
dc.date.accessioned | 2022-04-28T22:37:16Z | |
dc.date.accessioned | 2022-12-20T02:12:37Z | |
dc.date.available | 2022-04-28T22:37:16Z | |
dc.date.available | 2022-12-20T02:12:37Z | |
dc.date.created | 2022-04-28T22:37:16Z | |
dc.date.issued | 2011-04-01 | |
dc.identifier | International Journal of Electrochemical Science, v. 6, n. 4, p. 1175-1188, 2011. | |
dc.identifier | 1452-3981 | |
dc.identifier | http://hdl.handle.net/11449/226312 | |
dc.identifier | 2-s2.0-79955151633 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5406442 | |
dc.description.abstract | A novel nanostructured composite, azide copper octa (3-aminopropyl)octasilsesquioxane (ASCA) was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of the modified graphite paste electrode with ASCA (GPE-ASCA), showed one redox couple with formal potential (Eθ) = 0.30 V and an irreversible process at 1.1 V (vs Ag/AgCl; NaCl 1.0 mol L-1; v = 20 mV s-1). The redox couple with (Eθ) = 0.30V presents an electrocatalytic response for determination of ascorbic acid. The modified electrode gives a linear range from 1.0×10-4 -1.0×10-3 mol L-1 (r = 0.998) for the determination of ascorbic acid with detection limit of 6.9×10-5 mol L-1 and standard deviation of 2.3% for n = 3. The amperometric sensitivity was 122.1 mA/mol L-1 for ascorbic acid. The application this electrode was tested and ascorbic acid in three commercial pharmaceutical product (Cebion, Cewin and Redoxon) have been determined. © 2011 by ESG. | |
dc.language | eng | |
dc.relation | International Journal of Electrochemical Science | |
dc.source | Scopus | |
dc.subject | Ascorbic acid | |
dc.subject | Graphite paste electrode | |
dc.subject | Modified electrode | |
dc.subject | Silsesquioxane | |
dc.subject | Voltammetry | |
dc.title | Voltammetric behavior of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid | |
dc.type | Artículos de revistas | |