Preparation and study of Chloride - Liquid Selective Electrode based on quaternary ammonium salts in PVC matrix

Abstract

Chloride selective electrodcs based on PVC matrix membrane consist of various alkyl quaternary ammonium salts such as tetra heptylammonium chloride (THACI), and tetraoctylammonium chloride (TOACI) as a sensors with various mediators were prepared and studied.The study includes the electrodes parameters determination (slope, linear response range, detection limit, pH effect , life time and selectivity). Chloride electrode based on (TOACI) as sensor with di-n-octyl phthalate (DOPH) as mediator gives excellent response with a slop equal 60,1 mV.'decade which is the near to the Nernstian slope. Concentration was ranged from 10-2 M to 10-4 M with detection limit around 10-5 M. This electrode was used for chloride determination ion in samples using different potentiometric methods.