What are chlorine produced oxidants and how are they tested?

Document ID

Document ID TE7369

Version

Version 3.0

Status

Status Published

Published Date

Published Date 03/30/2018
Question
What are chlorine produced oxidants and how are they tested?
Summary
Testing for chlorine produced oxidants
Answer
When chlorine is added to fresh water, the solution will contain two forms of free chlorine: hypochlorous acid (HOCl) and the hypochlorite ion (OCl-). If the water also contains ammonia, the solution will also contain forms of combined chlorine such as monochloramine and dichloramine. The term “total chlorine” is used to refer to the sum of free chlorine and combined chlorine in fresh water. However, because salt water contains bromide, addition of chlorine also produces hypobromous acid (HOBr-), hypobromous ion (OBr-), and bromamines. The term “chlorine produced oxidants” is used to refer to the sum of these oxidative products. It is measured by analyzing the total chlorine concentration in a sample.

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