Analytical Sciences

Abstract − Analytical Sciences, 18(8), 875 (2002).

A 9,10-Anthraquinone Derivative Having Two Propenyl Arms as a Neutral Ionophore for Highly Selective and Sensitive Membrane Sensors for Copper(II) Ion
Mojtaba SHAMSIPUR,*1  Armen AVANES,*2 Mehran JAVANBAKHT,*3 Mohammad Reza GANJALI,*4 and Hashem SHARGHI*5
*1 Department of Chemistry, Razi University, Kermanshah, Iran
*2 Department of Chemistry, Tarbiat Moallem University, Tehran, Iran
*3 Department of Chemistry, Tarbiat Modarres University, Tehran, Iran
*4 Department of Chemistry of Chemistry, Tehran University, Tehran, Iran
*5 Department of Chemistry, Shiraz University, Shiraz, Iran
New polymeric membrane (PME) and coated graphite (CGE) copper(II)-selective electrodes based on 1-hydroxy-2-(prop-2'-enyl)-4-(prop-2'-enyloxy)-9,10-anthraquinone were prepared. The electrodes reveal linear emf-pCu2+ responses over wide concentration ranges (1.0 x 10-5 - 1.0 x 10-1 M with a slope of 27.3 mV decade-1 for PME and 8.0 x 10-8 - 5.0 x 10-2 M with a slope of 29.1 mV decade-1 for CGE) and very low limits of detection (8.0 x 10-6 M for PME and 5.0 x 10-8 M for CGE). The potentiometric response is independent of the pH of the test solution in the pH range 3.0 - 6.0. The proposed electrodes possess very good selectivities over a wide variety of other cations, including alkali, alkaline earth, transition and heavy metal ions, the selectivity coefficients for the CGE being much improved over those for the PME. The electrodes were used as indicator electrodes in the potentiometric titration of Cu2+ and in the recovery of copper ions from wastewater.