What can be done if the pH is hard to determine with the Phenol Red Color Disc?

Document ID

Document ID TE6329

Version

Version 3.0

Status

Status Published

Published Date

Published Date 08/16/2018
Question
What can be done if the pH is hard to determine with the Phenol Red Color Disc?
Summary
Phenol Red Color Disc Test
Answer
The Color Disc, pH, Phenol Red, 6.6-8.4 (Product # 9261100) is somewhat different than the other discs in that it is a color change (hue) that is viewed rather than a color intensity. If a customer has difficulty determining the pH, adding an additional drop of indicator may help.

 

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