Which TOC method is right for my sample?

Document ID

Document ID TE8534

Published Date

Published Date 19/09/2019
Question
Which TOC method is right for my sample?
Summary
TOC determination – purging method or difference method?
Answer
A distinction is made between two different techniques for TOC determination:
The purging method and the difference method.
The method for determining TOC should be chosen based on the sample composition.

 The purging method is suitable for samples...

 ... with a lot more TIC than TOC.
 ... with a very low TIC content.
 ... with a low TOC concentration.

The difference method is suitable for samples...
 ... that contain volatile organic carbon (VOC).
 ... that have a TOC concentration greater than or equal to the TIC concentration.

Case report: TOC – an insightful sum parameter