PMID: 15352508Sep 9, 2004Paper

Highly selective thiocyanate electrode based on bis-[N-(2-hydroxyethyl)salicylaldimino]copper(II) complex as a neutral carrier

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
Xiaoqing HuangQunfang Li

Abstract

A novel selective thiocyanate electrode of a PVC membrane based on bis-[N-(2-hydroxyethyl)salicylaldimino]copper(II) [Cu(II)-BNSDM] as a neutral carrier is reported. The selectivity sequence of this electrode is as follows: SCN- > ClO4- > I- > Sal- > Br- > NO2- > Cl- > NO3- > H2PO4- > SO4(2-), which is an anti-Hofmeister selectivity sequence. The electrode exhibits a Nernstian potential linear range to thiocyanate from 1.0 x 10(-1) to 6.0 x 10(-6) mol/L with a detection limit of 2.0 x 10(-6) mol/L and a slope of (-59.0+/-0.2)mV/decade in pH 5.0 of a phosphate buffer solution at 25 degrees C. Electrochemical impedance spectroscopy (EIS) and UV spectroscopy techniques were performed to understand the response mechanism of the electrode. The electrode had the advantage of simplicity, high selectivity, fast response and low detection limit compared with the other electrode, which had been reported before. The electrode had been applied to wastewater analysis, and the obtained results were satisfactory.

References

Mar 15, 1989·Analytical Chemistry·N A ChaniotakisM E Meyerhoff
Mar 29, 2002·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Mohammad Reza GanjaliMojtaba Shamsipur
May 7, 2002·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·H HattoriA Yuchi

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Citations

Jul 18, 2009·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Saad S M HassanMona S Mohamed
Apr 6, 2011·Analytical Chemistry·Vasilios S Hatzistavros, Nikolaos G Kallithrakas-Kontos

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