Vanillin Determination in Food Products with Pd Nanoparticles Modified Poly(Methylene Blue) Film Electrode

Abstract

Here, metal nanoparticles modified conductive polymer film electrode was fabricated via electrochemical technique. Methylene blue was electrochemically polymerized on the bare glassy carbon electrode surface. Then palladium nanoparticles were modified on the polymer surface by consecutive potential cycles. Resulting composite electrode was characterized with scanning electron microscopy and electrochemical impedance spectroscopy. Palladium nanoparticles modified poly(methylene blue) film glassy carbon electrode was used for sensitive and selective determination of vanillin with two linear ranges between 0.02 - 1 µM and 2 - 50 µM and a limit of detection as 0.01 µM. Proposed electrode accurately determine vanillin content in commercial biscuit and cake samples