PRUSSIAN BLUE BASED SCREEN PRINTED BIOSENSORS WITH IMPROVED CHARACTERISTICS OF LONG TERM AND pH STABILITY

Abstract

In this article is reported the effect of anionic surfactants AOT (dioctyl sulfosuccinate) in the electrodeposition of Prussian Blue (PB) onto screen-printed carbon electrodes (SPCE). The SPCE/PB/AOT electrode  displayed a significant improvement of its electrochemical properties and of its stability compared with PB modified SPCE  formed in absence of surfactant. The new electrodeposed PB/AOT film proved excellent electroanalytic properties for glucose determination and is a promising material for assembling of biosensors. In addition, the effects of pH value, applied potential, electroactive interference and the stability of the biosensor were discussed. The applicability to food analysis was also evaluted.