Screen-printed electrodes constructed using carbon black as conductive material

Abstract

The use of screen-printed electrodes has become attractive in the last years, mostly in function of its versatility and low-cost. In the present work, were developed screen-printed electrodes using a simple production methodology (silk-screen) and alternative materials (carbon black and acetate of cellulose). Screen printed electrodes prepared with 75% (m/m) of carbon black and 25% (m/m) of cellulose acetate had shown the best performance and they were employed for determination of ascorbic acid by chronoamperometry and cadmium and lead ions using anodic stripping voltammetry. Limit of detection of 3.1 × 10-5 mol L-1 and relative deviation of 1.9% were found for determination of ascorbic acid and linear dynamic range from 8.0 × 10-7 to 3.2 × 10-5 mol L-1 and 1.0 × 10-6 to 6.3 × 10-5 mol L-1 were verified for cadmium and lead ions respectively.