ISO 7393-3:1986 Water quality — Determination of free chlorine and total chlorine — Part 3: Iodometric titration method for the determination of total chlorine
1990ISO 7393-3:1990 Water quality; determination of free chlorine and total chlorine; part 3: iodometric titration method for the determination of total chlorine
1986ISO 7393-3:1986 Water quality — Determination of free chlorine and total chlorine — Part 3: Iodometric titration method for the determination of total chlorine