How much total ionic strength adjustment buffer (TISAB) should be added to fluoride standards and sample when using a Fluoride Ion Selective Electrode (ISE)?

Document ID

Document ID TE4537

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
How much total ionic strength adjustment buffer (TISAB) should be added to fluoride standards and sample when using a Fluoride Ion Selective Electrode (ISE)?
Summary
Amount of TISAB required in Fluoride ISE measurements
Answer
It is recommended to use one Fluoride Ionic Strength Adjustor (ISA) powder pillow (Catalog Number/Order Code 258999) per 25 mL of fluoride standard or water sample. Alternatively, it is recommended to use 5 mL of the liquid Fluoride Ionic Strength Adjustor (ISA), 3.78L (Catalog Number/Order Code 2829017) per 25 mL of fluoride standard or water sample.