Detection of lead ions in picomolar concentration range using underpotential deposition on silver nanoparticles-deposited glassy carbon electrodes

R Sivasubramanian; M V Sangaranarayanan

doi:10.1016/j.talanta.2011.07.057

Detection of lead ions in picomolar concentration range using underpotential deposition on silver nanoparticles-deposited glassy carbon electrodes

Talanta. 2011 Sep 30;85(4):2142-7. doi: 10.1016/j.talanta.2011.07.057. Epub 2011 Jul 23.

Authors

R Sivasubramanian¹, M V Sangaranarayanan

Affiliation

¹ Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.

PMID: 21872070
DOI: 10.1016/j.talanta.2011.07.057

Abstract

The efficacy of silver-deposited glassy carbon electrode for the determination of lead ions at the sub-nanomolar concentration ranges is investigated. The silver nanoparticles are electrodeposited on glassy carbon electrode using chronoamperometry and the electrode surface is characterized using SEM. Lead ions are detected in the region of underpotential deposition. The analysis is performed in square wave mode in the stripping voltammetry without the removal of oxygen. The detection limit of 10 pM has been obtained with a constant potential of -0.7 V during the electrodeposition step for a period of 50s. The interference of surfactants in the detection of lead ions is also studied.

Publication types

Research Support, Non-U.S. Gov't