BREAK-POINT

It is also called " Critical-point ".
It is the low point of the curve which represents the variation of the residual chlorine content of a water to be treated depending on the chlorine introduced.
This point corresponds to the quantity of chlorine where there no more subsists residual chloramines in water.
For a chloration higher to the critical point, the nearly amount of totality of residual oxidization exists as free chlorine .
The control of a treatment like this requires measure methods that allow to distinguish the different forms of residual chlorine.