A potentiometric method for the determination of chloride in boiler waters in the range 0·1 to 10 µg ml–1 of chloride

Abstract

A potentiometric method for determining chloride in boiler water has been developed, which is based on the potential of a silver-silver chloride wire electrode versus a mercury(I) sulphate reference electrode immersed in a buffered solution of the sample. The method was tested in the range 0·1 to 10·0 µg ml^–1 of chloride and the standard deviations of the results at 0·1, 1·76 and 10·0 µg ml^–1 of chloride were approximately 0·04, 0·06 and 0·2 µg ml^–1 of chloride, respectively. Substances normally present in boiler water do not interfere appreciably but the method is not suitable if octadecylamine is present.