Electrochemical sensors based on electrodes modified with copper nanopores and molecularly imprinted polymers for determination of xylobiosis in banana peel and pulp

Abstract

Xylobiosis is a high added value xylooligosaccharide that has attracted the interest of the food, pharmaceutical and agribusiness markets, by helping and modulating the good functioning of the human organism, promoting health. The molecule can be obtained by enzymatic hydrolysis of banana peel and pulp, providing these residues with greater relevance, more economical, strategic and environmentally friendly purposes. In this context, the determination of xylobiosis becomes interesting and fundamental for the process of reusing residues within a fruit refinery. Among the analytical methods of determination, the electroanalytical methods have stood out in recent years for presenting reliable analyzes, use of small sample volumes, application in complex matrices and portability. Thus, this project aims to build an electrochemical sensor modified with nanomaterials for the determination of xylobiosis in banana peel and pulp. Electrochemical sensors modified with nanomaterials, such as metallic nanopores, have a high surface area, benefiting the analytical performance because they present high sensitivity, selectivity, and speed in the analysis. In addition, the construction of molecularly printed polymers electropolymerized on nanostructured surfaces, provide selectivity and low detection limits. Thus, in this work, xylobiosis should be determined using voltammetric sensors consisting of glassy carbon electrodes modified with copper nanopores and printed molecular polymers electropolymerized directly on the modified electrode surface.