Determination of Vitamin B6 in Food Samples Using Nanostructure Based Electrochemical sensor

A highly sensitive and fast response electrochemical sensor based on ZnO/CNTs and 1-ethyl-3- methyl imidazolium tetrafluoroborate room temperature ionic liquids carbon paste electrode (ZnO/CNTs/ 1-E-3-MITFBr/CPE) is proposed for the determination of vitamine B6 in real samples. At first step, we study application of the ZnO/CNTs nanocomposite for the preparation of carbon paste electrode modified with ionic liquid as a suitable and high conductive binder. The electro oxidation of vitamine B6 occurs at a potential about 850 mV at a surface of ZnO/CNTs/ 1-E-3- MITFBr/CPE and this mount is better than the bare carbon paste electrode at the optimized condition. In continuous, other voltametric techniques such as syclic voltametry, chorono amprometry and differencial pulse voltammetry are studied. The differencial pulse voltametry (DPV) peak currents of vitamine B6 show good linear dynamic range (0.05-650 μM) with a detection limit of 0.01 μM. Finally, the proposed sensor was used as highly selective sensor for determination of vitamine B6 in real samples.