Analytical Sciences

Abstract − Analytical Sciences, 16(3), 307 (2000).

Selenite-Selective Membrane Electrodes Based on IonExchangers and Application to Anodic Slime
Guller EKMEKCI and Guller SOMER
Gazi Universitesi, Fen-Edebiyat Fakultesi, Kimya Bolumn, 06500 Ankara, Turkey
A new membrane selenite selective electrode has been developed. The electrode consisted of 4% ion exchanger, QAD 86PI (dialkyldimethylammonium chloride), as the active material, and 96% SR as the membrane matrix. An analyticallyuseful potential change occurs from 10-6 - 10-1 M selenite ion. The slope of the linear portion is 19 mV/10 fold change inselenite concentration. No interference was observed for SO42- , SO32- , S2- , HPO42- , Cl- , Br- and I- ions. The lifetime ofthe electrode was about three months. This electrode has been used for the determination of selenium in anodic slime atpH 8 (ammonia buffer) using standard addition method.