Post Graduate and Research, Department of Chemistry, Presidency College (Autonomous), Chennai, Tamil Nadu, India
*Corresponding Author E-mail: rrama_subhar@yahoo.co.in
Online published on 27 March, 2014.
L-cysteine (ligand) modified Wax Impregnated Graphite Electrode (WIGE) is used for detection of copper ions in aqueous solution. The L-cysteine modified WIGE is characterized by scanning electron microscopy and energy dispersive X-ray analysis. The electrochemical behavior of copper ions on L-Cysteine modified WIGE is studied through scan rate effect and pH study. The results indicated that cyclic voltammetric peak currents have a linear relationship with scan rate. The detection limit could be estimated as 5x10-5mM for Cu(II) ion by cyclic voltammetric method. The interference study is performed for equal molar concentrations of Cu(II), Cd(II) and Hg(II) ion on ligand modified WIGE. The diffusion co-efficient values for copper on electrode surface is calculated from chronocoulometry method
Sensor, cyclic voltammetry, EDX, SEM, chronocoulometry, interference study
