Will sulfite interfere with method 8140 for Oxygen Scavengers?

Document ID

Document ID TE4118

Published Date

Published Date 27/05/2017
Question
Will sulfite interfere with method 8140 for Oxygen Scavengers?
Summary
Sulfite interference in method 8140 for Oxygen Scavengers.
Answer
In method 8140 for oxygen scavengers, sulfite will react to give a false positive.

If sulfite is being added to create oxygen free water follow one of these steps to expel all the dissolved gases:
  • Sparge the water for a long period of time (at least an hour) with high purity argon or nitrogen
OR
  • Boil the water (though gases can be pulled back into solution as it cools).