as a Schlenk flask. This is done by drawing the liquid into the syringe via a needle, inserting the needle into the septum sealing a flask under a positive pressure of an inert gas, removing the glass plunger, and allowing the gas to bubble through the liquid in the syringe for several minutes. The glass plunger is then re-inserted and the liquid is added to the reaction flask. Other techniques such as cannulation can also be used to transfer liquids instead. References Laboratory glassware