What process describes the measurement of free chlorine residual plus combined chlorine residual?

The measurement of free chlorine residual plus combined chlorine residual is referred to as total chlorine residual. This term encompasses all forms of chlorine present in the water, which includes the chlorine that is available to disinfect (free chlorine) as well as the chlorine that has reacted with contaminants, forming combined chlorine. Understanding total chlorine is critical in water treatment processes because it provides an overall picture of the chlorine levels available for disinfection, which is necessary for ensuring water safety.

Breakpoints chlorination refers to a specific process of adding enough chlorine to achieve a certain level of oxidation of ammonia and other nitrogenous compounds, which is distinct from measuring total chlorine. Free chlorine analysis specifically focuses only on the chlorine that is available for disinfection, excluding combined chlorine. Chloramine formation relates to the process where ammonia reacts with chlorine to form chloramines, which is another aspect of chlorine use but does not directly describe the measurement in question. Thus, total chlorine residual is the most accurate description of the combination of free and combined chlorine levels in the water.