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Journal of Automated Methods and Management in Chemistry
Volume 2008, Article ID 453429, 5 pages
Research Article

The Study of a New Method to Determine Copper Ion by Square-Wave Voltammetry-Extraction Iodometry at the Liquid/Liquid Interfaces

1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, Shanghai 200240, China

Received 5 July 2008; Accepted 27 August 2008

Academic Editor: Peter Stockwell

Copyright © 2008 Changyan Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new method of indirect determination of Cu2+ was developed based on square-wave voltammetry by the oxidation of iodide in organic solvent at the liquid/liquid (L/L) interface. The limit of detection for the determination of Cu2+ in this method was found to be 5×104 mol/L, and the concentration ranged up to 1×102 mol/L gave a linear limiting current versus concentration response. For the same simulated wastewater, this method showed high accuracy compared with the result tested by sodium diethyldithiocarbamate extraction spectrophotometry. This approach could be applied to the indirect determination of the oxidative heavy metals in the industrial wastewater.