Filtration
Filtration is most easily accomplished using a syringe filter. PTFE filters tend to be most chemically resistant; nylon filters are less so.
Using a cannula, a filter stick Air-free technique#Gallery may be used. A filter stick is a short length of glass tubing sealed on one end with a septum, and sealed on the other with filter paper, or a sintered glass frit.
For larger volumes, it may be preferable to connect the donor and receiving flasks via ground glass joints to a sintered glass filter tube.
Read more about this topic: Cannula Transfer