تحضير قطب انتقائي جديد لأيون البلاديوم بالأعتماد على الايثر التاجي (Dibenzo-24-Crown-8)

Abstract

Abstract The aim of this study including prepare a new selective electrode of Palladium (II) ion by dependent on the crown ether (Dibenzo-24-Crown-8) as a sensor deposed in (PVC), the plasticizer material in the membrane was Di-n-Octyl Phenyl Phthalate (DOPP).This electrode gave a linear activity in the range of (5x10-7-5x10-3) mol/l with activity unit (27.51 mV/decade) and detection limit was (2.5x10-8) mol/l with correlation factor ( r ) 0.9997, linearity (R2) 0.9994, R.S.D % (1.4) % and (Erel. Re) % were (-2.5, 97.5) %.Factors effect on the nernast response of it is prepared electrode were studied, such as pH, concentration of internal filing solution, temperature, time response of the electrode, life time and the selectivity coefficient (Ki,jpot) determined in the presence anionic and cationic ionsThe best concentration of the internal filling solution was (1x10-3) mol/l, the acidity function (pH) between (5-7) and the best nernast response at (pH=6), temperature was 20°c, response time was between 35-55 sec., the life time of Pd-electrode was 7 days.