Application of Zeolite‐Polydimethylsiloxane Electrodes to Potentiometric Studies of Cationic Species

摘要: Potentiometric electrodes based on the incorporation of zeolite particles into polydimethylsiloxane (PDMS) membranes are described. The electrode characteristics evaluated regarding response towards alkali metal cations. Zeolite/PDMS-coated iridium disk offer lower limits detection (3 × 10−5 M for Cs+) and a more extended concentration range with Nernstian slope than zeolite-PDMS inner reference solution. Both types respond rapidly to changes (within few seconds or less). Zeolite-PDMS exhibit almost same sensitivity all cations independent use either X A. Furthermore, applied determination ionic surfactants. In contrast results obtained zeolites faujasite type (X Y) lead superior function when compared A zeolites. surfactants is accomplished by potentiometric titration using indicator electrode. Practical applications surfactant in commercial detergents presented verified performing two-phase as method.