Preparation of a palladium ion selective electrode based on the active substance 6-Dibenzo-18-Crown using PVC polymer.

Abstract

A palladium (II) ion- selective electrode was prepared; depend on the active
material DB18C6 as a sensor, deposed in PVC polymer, by use a (DOPP) as a plastizier
substance, in the membrane.
The behavior and characteristics properties of this electrode have been studied.
It respond for the concentration range (1x10-6-1x10-3) mol/ L of palladium,
with a relative standard error of about 2% and a relative standard deviation of 1-2 %.
The nernast linearity slop is equal to 26.7 mV/decade with detection limit of 1.5
x 10-7 mol/ L, and correlation coefficient of about (0.9998).
The selectivity coefficient Ki,j
pot of it is electrode was calculated, in the presence
of some interferences cations and anion with certain Pd (II) solutions.
It was found that range of pH response is (7-11), with response time of 25 sec. at
303 K, the electrode lifetime was found to be 11 days.