Fabrication of vanillin electrochemical sensor using glassy carbon electrode modified with Au@Pd /PMo12 nanohybrid

Vanillin is a widely used edible spice with strong milky flavor, it can be found in the seeds of vanilla or be synthesized. The determination of this food additive is very important in food samples due to high side effect of it in high level. In this research, we fabricated a highly sensitive electrochemical sensor based on glassy carbon electrode modified with Au@Pd /PMo12 nanoparticle (Au@Pd /PMo12 /GCE) for determination of vanillin in food samples. The Au@Pd /PMo12 /GCE showed the good catalytic activity for electrooxidation of vanillin and reduced the oxidation over-potential of vanillin in aqueous solution. The as-prepared electrode was successfully used for analysis of vanillin with limit of detection 6.0 nM. Finally, the proposed sensor was used for determination of vanillin in food samples.