Abstract
In this work, particles of cobalt oxyhydroxide (III), CoO (OH), synthesized by alkaline precipitation were used in a carbon paste electrode modified [CPEM_CoO(OH)] for the detection of phenolic compounds (catechol, guiacol, pyrogallol and salicylic acid). The cobalt-based electrode acts as the electron mediator, where the ion Co (III) acts effectively in the oxidation/reduction of analyte, via reductive dissolution. As a result, the modified carbon paste electrode [CPEM_CoO(OH)] exhibited good performance in the detection of phenolic compounds in a concentration range between 0 to 0.15 µmol L -1 , with a limit of detection (LOD) of 10 -8 mol L -1 . The electrochemical studies were performed using the techniques of cyclic voltammetry and linear. DOI: http://dx.doi.org/10.17807/orbital.v7i4.780
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