Determination of chloride in aqueous soil extracts and water samples by means of a chloride-selective electrode

Abstract

The chloride contents of water samples and soil extracts have been determined with an Orion chloride-selective electrode. The chloride content, at levels up to 100 mg l^–1, is determined in a solution that is 0·5 M with respect to ammonium nitrate and 0·03 M with respect to nitric acid.

Comparison of this method with a colorimetric AutoAnalyzer method showed no significant difference between the results obtained, but for water samples low in chloride (less than 3 mg l^–1) the colorimetric method was more accurate.