I'd like to do some experiments with liquid oxygen but as a first step I'll have to make some. Unfortunately I don't have any experience designing cryogenic experiments. I'm thinking I'll cool gaseous oxygen using liquid nitrogen as the coolant and then I want to collect the liquid oxygen condensate in a small dewar of some kind.
It needs to be high purity so I'll be using 99.9% purity "scientific grade" oxygen from a cylinder.
Does it make sense to use conventional condenser glassware like a dimroth condenser for instance? Alternatively what's the best equipment to use and what's the best way to rig a cryogenic setup like this?
Also what safety precautions should I take?