Biossensores e Bioeletrônica

Electrochemical Chelation of Lead by NDA Modified Carbon Paste Electrode

Abstract

Sakina Touzara, Rachida Najih and Abdelilah Chtaini*

The analytical performance of developed DNA film screen printed biosensors designed for the detection of metals was evaluated. The modified surface exhibited an affinity to chelating metal ions in solution, forming complexes. Square wave voltammetry combined with a pre-concentrating process and standard additions were employed for trace analysis. Finally, cyclic voltammetry technique was used to characterize the developed DNA film surface behavior in presence of heavy metal.