PVC MEMBRANE ELECTRODES FOR POTENTIOMETRIC DETERMINATION OF TRIPELENNAMINE

The construction of PVC matrix type tripelennamine ion selective elect rodes and their use for direct potentiometry, potentiometric titration and flow injection analysis of tripelennamine cation are described. T he membranes of these electrodes consist of tripelennamine-tetraphenyl borate, reineckate and picrylsulfonate ion-association complexes dispe rsed in PVC matrix with tributyl phosphate (TBP) plasticizer. The elec trodes exhibit near-Nernstian response over the concentration range of 10(-1)-10(-4) M tripelennamine over the pH range 4.5-8.0. Selectivity coefficients data obtained for 17 different organic and inorganic ion s are presented. The results obtained for the determination of 29 mu g /ml-29 mg/ml of tripelennamine with the proposed electrodes show avera ge recoveries of 99.5-99.9% and mean standard deviations of 0.6-1.2%. The data agree well with those obtained by the standard methods.