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Eletrodos de pasta de carbono modificados com ácidos húmicos: estudo e determinação de metais em meio aquoso

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Author(s): Crespilho Frank Nelson | Rezende Maria Olímpia Oliveira

Journal: Química Nova
ISSN 0100-4042

Volume: 27;
Issue: 6;
Start page: 964;
Date: 2004;
Original page

Keywords: humic acid | modified electrode | metals

ABSTRACT
Since 1992, the carbon paste electrodes modified with humic acids have been used for studying the behavior of metals in aqueous solutions. Many parameters influence the performance of the electrodes, such as the humic acid ratio, the nature of the humic acid, the accumulation time, the pH, the scan rate, and the preparation of the electrodes itself. There are various methos of preparing the electrodes. The goal of this paper is to review some of them. The advantages of using electrodes modified with humic acids as electrochemical sensors for evaluating metals in aqueous solution are stressed.
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