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Updated: Sep 29, 2025

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
Published on: June 30, 2019
Second-order derivative of square-wave voltammetry for determination of vanillin at platinum electrode
Carmen Ioana Fort1, Simona Codruta Aurora Cobzac2, Graziella Liana Turdean1
1"Babes-Bolyai" University, Faculty of Chemistry and Chemical Engineering, Department of Chemical Engineering, Research Center of Electrochemistry and Non-Conventional Materials, Arany Janos St.11, RO-400028 Cluj-Napoca, Romania.
Abstract:
A simple and sensitive method of data treatment by second-order derivative square wave voltammetry (SD-SWV) was developed for the determination of vanillin at a platinum electrode. It was shown that the irreversible oxidation reaction is controlled by the adsorption and occurs following a mechanism involving two electrons, similar to other phenolic derivatives. The experimental parameters of SWV which exert influence on vanillin determination, such as frequency, pulse amplitude, or step potential, were optimized. The calibration curve shows a linear range between 50 and 430 nM vanillin with a detection limit of about 19 nM (signal/noise = 3). The mathematical treatment of experimental data leads to enhances the sensitivity of the determination and was successfully used for the estimation of vanillin in commercial food products.
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