Development of Pd and Ag binary materials for modification of the glassy carbon electrode and disposable printed electrode for melatonin and nitrite determination

Abstract

The need in the electroanalytical field for new devices with high sensitivity, stability and the possibility of miniaturization and portability has been growing in recent years, so the development of disposable printed electrodes and nanomaterials to modify the surface of the glassy carbon electrode has been of interest in the industrial, medical and environmental analysis areas because they offer various types of applications, with advantages such as relatively low cost, the possibility of mass production and modification, ease of use and catalytic activity in the case of nanomaterials. The disposable printed electrodes are manufactured by conductive inks composed primarily of a conductive material and a polymeric matrix that will be applied to a chemically inert substrate. In electrocatalysts, the combination of platinum and palladium nanomaterials with other metals has the purpose of increasing their catalytic activity and the possibility of modification of the electrode surface when acting as electrochemical sensors. These modifications with the material can be accomplished by fixing them on the electrode surface with polymeric films, where a manioc starch-based film will be used in this work. Thus, the purpose of this project is the development of palladium and silver binary material distributed in carbon black and a conductive ink miniaturized disposable electrode for the detection of sodium nitrite and melatonin.