A Simple Approach for the Electrochemical Determination of Vanillin at Ionic Surfactant Modified Graphene Paste Electrode

Abstract This paper describes a simple approach for the determination of vanillin (VN) based on the ionic surfactant modified graphene paste electrode. The electrochemical behavior of VN at the modified electrode is investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), suggests the modified electrode exhibits excellent electrochemical activity towards VN compared to the bare electrode. VN shows an irreversible behavior, and the nature of the electrode response was noticed to be adsorption controlled. Under the optimized conditions, the anodic peak current for VN was proportional to VN concentration from 4×10−6 to 1.5×10−5 M and 2×10−5 to 7×10−5 M with a limit of detection 1.29 µM. The developed method was effectively applied in the determination of VN in commercial food samples with good recovery.