The sample turns blue instead of pink after adding the Hardness Indicator Reagent (Univer®3, ManVer®, or CalVer®). What does this mean?

Document ID

Document ID TE290

Version

Version 5.0

Status

Status Published

Published Date

Published Date 08/09/2018
Question
The sample turns blue instead of pink after adding the Hardness Indicator Reagent (Univer®3, ManVer®, or CalVer®). What does this mean?
Summary
Sample turns blue after adding UniVer®3, ManVer®, or CalVer®
Answer
If the sample turns blue instead of pink after adding the Hardness Indicator Reagent (UniVer®3, ManVer®, or CalVer®), this indicates that the sample water is very soft and its hardness is below the detection limit of the test. This is common after the water has been softened.

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