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Schiff Base Complexes of Cobalt (II) as Neutral Carriers for Highly Selective Iodide Electrodes
Anal. Chem. 1993, 65, 2572-2575，-0001，（）：
A new solvent polymeric membrane electrode based on Schiff base complexes of Co(II) is described which demonstrates excellent selectivity toward the iodide ion. The resulting electrode exhibits fairly low detection limits and good selectivity properties. The selectivity sequence observed is iodide>thiocyanate～nitrite>perchlorate～bromide>nitrate>chloride>sulfate. The excellent selectivity for iodide is related to the unique interaction between the central Co(II) ion and iodide. The response mechanism of the electrode was also studied with the ac impedance and spectroscopic techniques.
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