An Electrochemical Nanostructured Sensor For Determination of Ferulic Acid in Food Samples

CuO/CNTs nanocomposite and room temperature ionic liquid carbon paste electrode (CuO/CNTs/IL/CPE) were fabricated to determine ferulic acid in corn milk, wheat flour, and corn cider samples. At first, CuO/CNTs was characterized by transmission electron microscopy (TEM). In continuous, The electro-oxidation of ferulic acid investigated in phosphate buffer at the surface of modified electrode which was much better in comparison with bare carbon paste electrode. Other electrochemical techniques were also examined including cyclic voltammetry, differential pulse voltammetry (DPV) and chronoamperometry at CuO/CNTs/CPE/IL. At optimized conditions for ferulic acid analysis, voltametric peak currents of ferulic acid showed a wide linear dynamic range with a good detection limit of 5.0 nM. Finally, the proposed sensor was used for determination of ferulic acid in real samples with good selectivity and high sensitivity.