[bootlegengineer]

So I have a few Prozorb 4004 columns filled with Amberlite XAD4 that I found a few years ago while helping my friend with a cleanup job for someone, but I have no clue what to do with it. I did some research and its apparently made of styrene-divinylbenzene and that is a "Nonionic macroreticular resin that adsorbs and releases ionic species through hydrophobic and polar interactions; usually used under isocratic conditions." I don't want to throw it away because it shows no signs of discoloration and is just a little wet from being stored in a slightly damp environment, but I also don't want to waste something that apparently goes for $240 per kg or $3,880 per column I just found out. Best case scenario, I'd like to find a way to sell this stuff, but idk who would want it or if i need to do something crazy to test if the stuff is still useable.