What is the correct order to add the reagents for a dissolved oxygen Winkler titration?

Document ID

Document ID TE272

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
What is the correct order to add the reagents for a dissolved oxygen Winkler titration?
Summary
Winkler oxygen method - order of reagent addition
Answer
It is best to follow the Standard Methods procedure, which specifies adding manganous sulfate first, then adding the alkaline iodide-azide reagent right away. Be sure to mix the sample well after adding these reagents.