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

الملخص

A Nickel (II) ion- selective electrode was prepared; depend on the active
material DB18C6 as a sensor, deposed in poly vinyl chloride PVC polymer, and using
(DBPH) as a plastizier substance, in membrane.
The behavior and characteristics properties of this electrode have been studied.
The calibration linear range was (1x10-1-1x10-8) mol/ L nickel with a correlation
coefficient of (0.9976) relative standard error of 1.221 % and a relative standard
deviation of 1.899 %.
The linearity slop is equal to 29 mV/decade with a detection limit of
5 x 10-8 mol/ L.
The selectivity coefficient Ki,j of the electrode was calculated, in the presence
of some interferences cations .
It was found that the electrode response in the pH range of (2-8), with response time
of (10- 48) sec. for different concentrations at 25Co, the electrode lifetime was found
to be 24 days , the effect of using different plasticizer substances was alsostudied.