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Electrochemical behaviour of isatin at a glassy carbon electrode [An article from: Analytica Chimica Acta]
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
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 D"0=4.9x10^-^7cm^2s^-^1. The limit of detection obtained in a solution of pH 7.0 phosphate buffer was LOD=0.194@mM, based on three times the noise level.
Description:
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 D"0=4.9x10^-^7cm^2s^-^1. The limit of detection obtained in a solution of pH 7.0 phosphate buffer was LOD=0.194@mM, based on three times the noise level.
