Degassing


Benjamin-Mills.com > Bristol > Laboratory techniques > Degassing

Wikipedia: Degasification

Sparging


Summary: Bubbling nitrogen through a liquid (usually some solvent) to displace any dissolved oxygen.

Wikipedia: Sparging (chemistry)

Freeze-pump-thaw cycling


Summary: Rapidly freezing a liquid in a Schlenk flask, applying vacuum, sealing the flask, then warming the solid to thaw it. Upon thawing, dissolved gases form bubbles which escape. Repeat thrice.

Wikipedia: Degasification#Freeze-Pump-Thaw cycling