Cd(II)-ion-selective electrode based on chalcogenide glasses

Cd(II)-ion-selective electrodes (Cd(II)-ISEs) were developed on the base of chalcogenide glasses (ChGs) from the GeSe ₂–Sb ₂Te ₃ –CdSe system. Novel constructional designs of the “coated wire” type were created consisting of an inner Ag/AgCl reference electrode uniformly coated with a composite mixture of a binding polymer and Cd-containing ChG powder. Cd(II)-ISEs were tested with respect to their basic analytical characteristics: stability, linearity (L, mol l ⁻¹) and slope (S, mV dec ⁻¹) of the electrode function, working pH-range, limits of detection (LD, mol l ⁻¹ ), response time ( τ ₉₅, s ) and selectivity coefficients ( K i , j pot ) in the presence of ions, which commonly accompany Cd ²⁺-ions in the analytical media.