Filtering a Solution: Your filtration apparatus will consist of three parts: the Schlenk flask containing the sample, the Schlenk frit, and the receiving Schlenk flask I)While the glass is still hot, grease both ends of the frit. Attach one end to the receiving flask(don't forget the stir bar! ) and cap the other end with another small flask that has a 14/20 opening. Secure with Keck clips. Evacuate the set-up. Refill with nitrogen(be careful not to suck oil from the bubbler into your manifold! ) Repeat the vac-fill cycle at least three times 2)When you are ready to filter, place both the sample flask and the receiving flask under a positive nitrogen flow. Quickly remove the small capping flask from the frit and the septum from the sample flask. Connect the two components, and invert 3)Close off the original sample flask from N,, and pull a slight vacuum on the receivin flask(make sure you have a cold trap set up on your vacuum line, to prevent any solvent vapors from destroying the expensive pump! ) You can then close off the vacuum, since filtration should occur under static vacuum 4)When the solution has been transferred, apply positive n, flow to the receiving flask and replace the frit with a rubber septum.Filtering a Solution: Your filtration apparatus will consist of three parts: the Schlenk flask containing the sample, the Schlenk frit, and the receiving Schlenk flask. 1) While the glass is still hot, grease both ends of the frit. Attach one end to the receiving flask (don't forget the stir bar!), and cap the other end with another small flask that has a 14/20 opening. Secure with Keck clips. Evacuate the set-up. Refill with nitrogen (be careful not to suck oil from the bubbler into your manifold!). Repeat the vac-fill cycle at least three times. 2) When you are ready to filter, place both the sample flask and the receiving flask under a positive nitrogen flow. Quickly remove the small capping flask from the frit and the septum from the sample flask. Connect the two components, and invert. 3) Close off the original sample flask from N2, and pull a slight vacuum on the receiving flask (make sure you have a cold trap set up on your vacuum line, to prevent any solvent vapors from destroying the expensive pump!). You can then close off the vacuum, since filtration should occur under static vacuum. 4) When the solution has been transferred, apply positive N2 flow to the receiving flask and replace the frit with a rubber septum. 54