Application of biohybrid silsesquioxane based material modified with methylene blue for determination of sulphite

Abstract

Detecting organic and inorganic contaminants is one of the most important environmental concerns today. Consequently, the search for low-cost materials and efficient technologies for solving such a problem has increased, becoming of the utmost importance.Within this context, the present study applied a new nanostructured bioinorganic hybrid material with great potential in the field of nanotechnology: yeast Saccharomyces cerevisiae chemically modified with cubic silsesquioxane. Based on voltammetric measurements with modified graphite paste electrodes with yeast/silsesquioxane and methylene blue (YSB), the value of anodic peak current decreased linearly as the concentration of sulphite increased. The limit of detection obtained was of 0.60 μmol L−1 and sensitivity amperometric (Sa) of 5.8 × 10−4 μA/mol L−1