ISO 7393-3:1990

Water quality — Determination of free chlorine and total chlorine — Part 3: Iodometric titration method for the determination of total chlorine

Specifies a procedure for water. It is applicable for the measurement of concentrations, in terms of chlorine, from 0,01 to 0,21 mmol/l. The interfering substances are given. In annex B a procedure for direct titration is specified. It is usually applied to chlorine concentrations above 7 mol/l in treated drinking water.