Anodic Stripping Voltammetry of Heavy Metals on a Metal Catalyst Free Carbon Nanotube Electrode

Abstract

Abstract Anodic stripping voltammetry (ASV) determination of Pb 2+ , Cd 2+ , and Zn 2+ was done using metal catalyst free carbon nanotube (MCFCN) electrodes. Osteryoung square wave stripping voltammetry (OSWSV) was selected for detection. The MCFCNTs are synthesized via Carbo Thermal Carbide Conversion method which leads to residual transition metal free in the CNT structure. The new material shows very good results in detecting heavy metal ions, such as Pb 2+ , Cd 2+ , and Zn 2+ . The calculated limits of detection were 13 nM, 32 nM and 50 nM for Pb 2+ , Cd 2+ and Zn 2+ , respectively with a deposition time of 150 s.