pip
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Falsely marked 24/40?
this liebig I won at auction doesn't look right. I think the bottom is 24/40 only if so why? (I havn't recived it these pics are from the seller)
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kclo4
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Only one way to find out I guess?
If it is not you can always buy an adapter or jimmy-rig it so it works with the rest of your set-ups. This could be easy to do depending on what you
have, and what chemicals you plan on using with it.
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ordenblitz
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Looks to me like the joint was formed but not ground.
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DJF90
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It looks like a clear-fit joint, but definately not 24/40. I dont even think it would be a 24/29... But so long as its a "24" joint it should still
work with the rest of your setup, only your 24/40 cones will not go right in, however I dont think this is a problem as a good seal should still be
made.
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pip
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there is no question the bottom is 24/40 but why would they make one that only has the bottom joint as 24/40?
so you guys think that first cm or so is ground and good enough?
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evil_lurker
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My guess is that it is a 24/25 half length joint. I've seen them a couple times used primarily on cows and certain resin reaction flask tops.
It is also highly possible that is a repaired joint.
As to why it appears not ground... well it could be that there was a PTFE sleeve being used, some residual grease or who knows...
[Edited on 26-2-2009 by evil_lurker]
Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in
beer.
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smuv
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That looks about like a 24/40 joint to me, it is possible that it was used for some special setup such as the distillation of diazomethane, where
ground glass should not be used.
"Titanium tetrachloride…You sly temptress." --Walter Bishop
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chemrox
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Repair or release from poor Q/C. You could send it to a glassblower and have a 24/40 put on it. If you got it on ebay send it back.
"When you let the dumbasses vote you end up with populism followed by autocracy and getting back is a bitch." Plato (sort of)
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querjek
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I once got a liebig like that from a flea market... 24/40 joints will fit in it enough, but make sure you grease it and use a clip or stand or
something like that on it.
it's all about chemistry.
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evil_lurker
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| Quote: | Originally posted by chemrox
Repair or release from poor Q/C. You could send it to a glassblower and have a 24/40 put on it. If you got it on ebay send it back.
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Honestly it ain't worth it when you can buy a brand new one from expediglass for like $40 with shipping included.
$10 to get it there, $10 to get it back, $10 bucks for the joint, and probably $10 for the labor.
Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in
beer.
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pip
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so I should dispute it and look for a new one? like I said it hasn't been shipped (or paid for) yet
or is it possible the top is clear seal and the bottom is ground glass?
[Edited on 27-2-2009 by pip]
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smuv
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Did you have this picture from the seller before you bid on the item? If this is the case, then you would be a real asshole to dispute it, as it is
clear in the picture that there is something off about the joint.
"Titanium tetrachloride…You sly temptress." --Walter Bishop
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ProChem
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I have the exact condenser in my lab. the condenser is for reflux only. The top is for a one hole rubber stopper where a calcium chloride tube is
fitted. When I use sodium hydride in THF to deprotinate alcohols I use this condenser.
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pip
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I only noticed it after I won it but its cheap enough so i'll buy it. I just wanted to know it was made like that for a reason. also the "asshole" is
the person who just called it a 24/40 liebig and never mentioned the other end.
[Edited on 27-2-2009 by pip]
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