How can an air bubbles in the bottle be avoided when following the Winkler titration method for dissolved oxygen?

ID documento

ID documento TE271

Data pubblicazione

Data pubblicazione 10/07/2018
Domande
How can an air bubbles in the bottle be avoided when following the Winkler titration method for dissolved oxygen?
Sommario
How to avoid trapping air bubbles in a winkler titration
Risposta
Air may become trapped in the bottle when replacing the stopper after adding reagents. If there is an air bubble in the bottle the dissolved oxygen measurement will be inaccurate and show a higher than actual concentration. Try dropping the stopper from a height of 2 to 3 inches above the bottle, or insert the stopper with a quick thrust to avoid trapping air.

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