Calix[4]resorcinarene ionophore in the ion-selective electrodes with plasticized poly(vinylchloride) membranes

Synthetic ionophore calix[4]resorcinarene was incorporated into the poly(vi nyl chloride) (PVC) plasticized membrane of an ion-selective electrode (ISE ). Calixarene interactions with quaternary ammonium and alkaline metals cat ions in the organic and water-organic media were carefully investigated by various authors. We studied the effects of choline and Na+ cations present in the working solution on the ionophore which was incorporated into a memb rane phase. Due to the pH sensitivity of the ionophore, a study was underta ken in a wide range of pH values. The different characteristics of calix[4] resorcinarene interactions with these cations were discovered by the ISE wi th the PVC plasticized membrane containing this ionophore, which respond to both the choline and Na+ cations due to the variation of working solution pH.