Rhodium (Chief Bee) 05-30-03 04:53 No 436452 |
Emptying Separation funnels with a stuck stopper (Rated as: good read) |
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Reference: Aldrichimica Acta 23(4), 86 (1990) |
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Capt_Stubing (Stranger) 05-30-03 08:04 No 436486 |
Great Tip!!!! | Bookmark | ||||||
Good tip!!! I never would have thought of that... I wish that common sense was a little more common. "Still humping the American dream" HT- Fear and loathing |
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bones (Newbee) 05-30-03 08:09 No 436488 |
hehehe... clever... ive broken one by banging... | Bookmark | ||||||
hehehe... clever... ive broken one by banging on it with a glass rod... someone recomended to me to pump air in... lets just say thats not a good idea and leave it at that.... |
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GC_MS (Hive Addict) 05-30-03 08:22 No 436491 |
And just in case your stopper is stuck as well... (Rated as: good idea!) |
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As we are on the topic now... I'm pretty sure many bees have encountered problems with stuck stoppers. What I see most ppl doing is trying to turn around the stopper, so it might get loose. Wrong thing to do! It will only get stuck harder. The following picture should illustrate what you'd have to do: Do not turn around the stopper, just wiggle it a bit to the left and to the right. Don't use brute force. Think you're giving a nipple masage. Do it gentle and with care. Eventually, the stopper will give up its life as stucked-stopper and come out. It can take a while, so you are warned. Don't tell me this is bogus because you have been trying it for more than 5 minutes. It can take a while... My record is ca 20 minutes! A stoppered flask containing 10% KOH, unopened for over half a year... but the stopper gave up . The faster you run, the quicker you die. |
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hbo2 (Stranger) 05-30-03 15:01 No 436570 |
pipettes are fragile! | Bookmark | ||||||
swih had similar experience...had lye locked sep funnel after adding salt.SLOWLY poked pipette into valve opening,but just once with a LIIIItle too much pressure,& "SNAP" goes the pipette.took him a while to fish that out! |
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moo (Hive Bee) 05-30-03 20:14 No 436633 |
There is an error in the threads topic. | Bookmark | ||||||
There is an error in the threads topic. This isn't about stuck stopcocks but stuck stoppers. Edit: Good point, I have now fixed that /Rhodium fear fear hate hate |
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Jackhammer (Hive Bee) 06-02-03 00:43 No 437066 |
Stopcock? | Bookmark | ||||||
Whe a stopper wonīt move I always gently tap the edge of the table with the stopper(just like all other chemists). This also gives the desired motion to get it out...After having broken a glass stopper with my own hand (resulting in a nice cut) I donīt even think about twisting them again... In the beginnerīs mind there are many possibilities, but in the expertīs mind there are few. |
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IceHomer (Stranger) 06-02-03 03:52 No 437096 |
Stuck stoppers | Bookmark | ||||||
http://www.ilpi.com/inorganic/glassware/ Also: http://www.ilpi.com/inorganic/glassware/ Drug use carries a monkey-back guarantee. |
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