How can free chlorine be determined with the CL17 if there are high levels of manganese?

Document ID

Document ID TE1938

Version

Version 4.0

Status

Status Published

Published Date

Published Date 03/07/2019
Question
How can free chlorine be determined with the CL17 if there are high levels of manganese?
Summary
CL17 Free Chlorine Determination in Presence of Manganese
Answer
Determine manganese content via Method 8021 and if the concentration is more or less, either add or subtract from the chlorine concentration. The obtained constant can also be put in as zero reading and then calibrate it out of the CL17 if the operator does not want to do calculation off-line.

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