Determination of Free Chlorine in Water

The most important issue is the cleanliness of the water used in homes, workplaces and common areas such as pools. Many of the epidemics are caused by the microbiological pollution of the water used. Therefore, the water used must be disinfected. Chlorine is also used for disinfection of domestic and cleaning water and pool water.

In order to determine the chlorine requirement, which is green in color and heavier than air at normal temperature and pressure, 3 points must be determined. The chlorine requirement can be calculated by determining the difference between the chlorine added to the water and the free chlorine remaining after a certain contact time and the usable chlorine.

Free chlorine test is carried out in order to detect the chlorine ion mixed into the water for disinfection. Chlorine is used to prevent and destroy the proliferation of microorganisms, especially in water distribution networks.

TS 5489 EN ISO 7393-1 Water quality - Determination of free chlorine and total chlorine - Part 1: Titrimetric method
TS 6229 EN ISO 7393-2 Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method for routine controls
TS 6230 EN ISO 7393-3 Water quality - Free chlorine and total chlorine determination - Part 3: Iodometric titration method for total chlorine determination

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