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

Document Number: NL ISO 7393 3 : 2009
Sector: Food Technology
TC: No
ICS: 13.060.50
This part of ISO 7393 specifies an iodometric titration method for the determination of total chlorine in water. The method is applicable for the measurement of concentrations in terms of chlorine (Cl2), from 0,01 mmol/1 to 0,21 mmol/l (0,71 mg/l to 15 mg/l). Several substances interfere in the determination (see clause 10). In annex B a method for direct titration is specified. This is usually applied to the determination of chlorine concentrations above 7 μmol/l (0,5 mg/l) in treated drinking water.