Hi, gurus of the chemical forums (fora?). Sorry if this is a stupid question (!) just trying to improve my understanding...
For... reasons, I'm currently using a fume hood that's connected to argon but not nitrogen. I seem to recall, from some murky corner of my memory, that I was once told that it's a bad idea to pull argon across a cold trap (cooled by liquid nitrogen) however I don't remember why and I can't find any info about this (so I am wondering whether my memory is faulty).
I could do with degassing some solvent, preferably by freeze-thaw. If I repeatedly freeze the solvent then pull the argon out of the vessel across the cold trap, is that a safety hazard?