Test prop conversion.

weight77 · Dec 1, 2003

I think there may be a problem with the purity of the product you got..when something crashs it should crystalize..always..

I dont know what to tell you..if it does not separate then you could still use it..But do you really want to use it is the question..being in the state that it is..

joedokes · Dec 1, 2003

There are no crystals, but it just gets cloudy when it's not warm.

Tadger · Dec 1, 2003

Hmm. What did you use to sterilize your glassware with? If you used isopropyl alcohol and it wasn't completely evaporated when you started your conversion, then chances are that's the problem. If you get isopropyl alcohol in your gear (or a small amount of water), the solution will cloud up when it's cool, but clear when heated.

Try heating the solution slowly. If the solution clears and you see condensation at the top of the vial (kinda like when you heat water in a sealed container), then your solution is contaminated with either water or isopropyl alcohol. If that's the case, you'll need to get a new sterile vial to put the gear in. Pop the top off the old vial and heat the solution gently. Use a hotplate so you have good control over the temp of the solution. Just leave the top of the vial open and heat it. You may want to set up a propane torch so that the flame is directed above the vial too. That will heat the air above the vial and prevent dust n shit from dropping into your vial (hot air rises... etc etc. If you work in a lab then you'll be familiar with this technique... especially if you don't get much time under the hood... [grumble]...). Anyway... um.... yeah. You'll have to refilter when you're done.

I'd recommend a .22um filter... the .45um filters are too big, they let too much through. Let it cool slowly to room temp. If it's still cloudy, then add a bit more solvent (BA or BB). It may just be some cryztalization but the solution isn't saturated enough that it all crashes completely. The crystals will be too small to see, and semisolvated... which would just leave the solution cloudy.

joedokes · Dec 1, 2003

That's exactly what happens, and I did clean everything with isopropyl. I don't have any clean vials left. Could I just heat it up with a needle through the top? THinking back to college chemistry won't the evaporated air escape up through it?

Tadger · Dec 1, 2003

Yeah, you could do it that way... it just takes a whole lot longer. lol. Give it a go. Heat it and when you see some condensation starting to form... just get a clean syringe and needle... and pump some new air in to force the old stuff out through the ventilation pin that's already in there. Do that a few times. Should do the trick. keep repeating that until you see no more condensation. Be careful not to get your oil too hot though. Don't wanna damage the gear or make the oil rancid...