Solvent‐Polymeric ISEs Tailored for Measurements in Solutions Containing Tetrabutylammonium, Cesium, and Calcium Ions

Abstract

Ion-selective electrodes are described, with membranes tailored for measurements of tetrabutylammonium ions in aqueous and formamide solutions, and for measurements of cesium and calcium ions in the presence of tetrabutylammonium. It is shown that reliable measurements of cesium ions are possible when a correction is introduced for interference from tetrabutylammonium, using Nikolsky selectivity coefficient. A novel membrane composition is described which ensures high selectivity to calcium ions over tetrabutylammonium.

Thin layer electrochemical extraction of non-redoxactive cations with an anion-exchanging conducting polymer overlaid with a selective membrane

“…S6w), which is comparable to previous work. 9 These results follow the sequence of decreasing hydration energy of the characterized cations, as expected for a PVC membrane without selective receptor. NaCl.…”