ANALYSIS CHLORINE DISSLOVED WITH ELECTROMETRIC

Abstract

Based on Clark type electrode, chlorine electrode has been made for measuring chlorine electrometrically. The electrode consisted of platinum working electrode, silver/silver chloride reference electrode, potassium chloride as an electrolyte, polyethylene polymer (32 μm thick) membrane and the electrode body was made of polyester resin. The result of the study indicated that the sensor was suitable for determining the dissolved chlorine at optimum operating characteristics with an applied voltage of 0.9 Volt, using saturated solution of potassium chloride as an electrolyte. The steady state reduction current was achieved after 12 seconds. The standard calibration curve (concentration dissolved chlorine-reduction current) showed a linier relationship in the range of 2.9 – 30 ppm. The analytical performance characteristic of the probe indicated: least square fitting test y = 0.4214x - 0.3714, sensitivity 0.3714 ppm/μA and detection limit 2.9 ppm.