Is there a chlorine demand standard?
Standards for chlorine demand
Hach does not provide a standard for chlorine demand. The method for chlorine demand involves a chlorine test, but at varying temperatures, contact times, etc. which are defined by the customer. As a result, we can test the accuracy of the chlorine measurement using a chlorine standard, but we cannot test the accuracy of the chlorine demand since it depends on how the customer defines the test.