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https://hdl.handle.net/10316/5076
Title: | Electrochemical behaviour of isatin at a glassy carbon electrode | Authors: | Diculescu, Victor C. Kumbhat, Sunita Brett, Ana Maria Oliveira |
Keywords: | Oxidation; Reduction; Voltammetry | Issue Date: | 2006 | Citation: | Analytica Chimica Acta. 575:2 (2006) 190-197 | Abstract: | The electrochemical behavior of isatin - a molecule with a broad range of applications in synthetic, biological and clinical activity - has been investigated over a wide pH range at a glassy carbon electrode (GCE) using cyclic, square wave and differential pulse voltammetry. The oxidation of isatin is an irreversible process, pH dependent and occurs with the formation of a main oxidation product that strongly adsorbs on the electrode surface. The reduction of isatin is also a pH dependent irreversible process. Cyclic voltammograms show two consecutive charge transfer reactions. The diffusion coefficient of isatin was calculated in pH 7.0 phosphate buffer to be D0 = 4.9 × 10-7 cm2 s-1. The limit of detection obtained in a solution of pH 7.0 phosphate buffer was LOD = 0.194 [mu]M, based on three times the noise level. | URI: | https://hdl.handle.net/10316/5076 | DOI: | 10.1016/j.bioelechem.2006.03.015 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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