Fort Carmen Ioana, Cobzac Simona Codruta Aurora, Turdean Graziella Liana
"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.
"Babes-Bolyai" University, Faculty of Chemistry and Chemical Engineering, Department of Chemistry, Arany Janos St.11, RO-400028 Cluj-Napoca, Romania.
Food Chem. 2022 Aug 15;385:132711. doi: 10.1016/j.foodchem.2022.132711. Epub 2022 Mar 15.
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.
开发了一种通过二阶导数方波伏安法（SD-SWV）进行数据处理的简单灵敏方法，用于在铂电极上测定香草醛。结果表明，不可逆氧化反应受吸附控制，其发生遵循涉及两个电子的机理，这与其他酚类衍生物类似。优化了对香草醛测定有影响的SWV实验参数，如频率、脉冲幅度或步长电位。校准曲线显示香草醛浓度在50至430 nM之间呈线性，检测限约为19 nM（信噪比=3）。对实验数据的数学处理提高了测定的灵敏度，并成功用于商业食品中香草醛的估算。
