Title: Great Tip!!!!
Post by: Capt_Stubing on May 30, 2003, 08:04:00 AM
Good tip!!! I never would have thought of that... I wish that common sense was a little more common.
Title: hehehe... clever... ive broken one by banging...
Post by: bones on May 30, 2003, 08:09:00 AM
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....
Title: And just in case your stopper is stuck as well...
Post by: GC_MS on May 30, 2003, 08:22:00 AM
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 :P .
Title: pipettes are fragile!
Post by: hbo2 on May 30, 2003, 03:01:00 PM
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!
Title: There is an error in the threads topic.
Post by: moo on May 30, 2003, 08:14:00 PM
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
Title: Stopcock?
Post by: Jackhammer on June 02, 2003, 12:43:00 AM
Whe a stopper won´t move I always gently tap the edge of the table with the stopper(just like all other chemists :P ). 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 don´t even think about twisting them again...
Title: Stuck stoppers
Post by: IceHomer on June 02, 2003, 03:52:00 AM