Voltammetry Application of Molecularly Imprinted Polyacrylamide as Vanillin Receptor in Desserts

The proposed work reflects a polyacrylamide with molecular imprints over graphite substrate (MIPAM/GP electrochemical sensor) fabricated to detect the flavoring element vanillin (VNL). The synthesized material has been characterized with scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscope, and UV–visible (UV-Vis) spectroscope. A three-electrode arrangement has been used to evaluate the electrode’s analytical performance using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The electrode featured a wide linearity range of 0.1– $1000 ~\mu \text{M}$ in addition to the limit of detection (LOD) of 1.43 nM. The fabricated sensor demonstrated excellent repeatability, reproducibility, and selectivity at low cost with long-term stability. The practical application of the MIPAM/GP electrode was assessed using various dessert extracts such as ice cream, yogurt, custard, milkshake, and the results were promising when compared to the high-performance liquid chromatography (HPLC) study.