Dear Edward,
I always use isopropyl alcohol first to clean. It is cheap and safe on
most surfaces. Most cleaning solution contains isopropyl alcohol.
Sandip
At 05:34 PM 1/8/2002 +0800, you wrote:
>Hi all,
>
>We have a JEOL Lambda 400, and a narrow-bore Magnex supercon circa 1995.
>A sample tube containing about 4 ml of diosgenin-containing chloroform
>solution broke while loaded in the autosampler on top of the magnet.
>Probably the worst place to have a tube break (and a 10-mm one at that)
>since the sample left gunk (and pieces of glass) all the way from top to
>bottom of the bore, including the probe. I was able to clean the probe,
>but the bore is another matter.
>
>I had to remove the autosampler accessory to get a cleaning stick ("giant
>size Q-Tip") through the top of the magnet. It seems that chloroform is a
>good solvent for the sample, but I'm quite reluctant to wet my cleaning
>stick with it because there may be rubber o-rings inside that could
>swell. I have cleaned the bore before, but this sample likes to stick and
>leave a film inside the bore.
>
>If anyone has had this type of problem before, we sure could use some
>advice. This is the first time in 5 years that a sample tube has broken
>while loaded.
>
>------------------------------------------------------------------------------
>Edward T. Chainani Nuclear Magnetic Resonance Laboratory Manager
>
> National Chemistry Instrumentation Center (NCIC)
>
>Ateneo de Manila University phone: (632) 426-6001 loc. 5629
>Loyola Heights, Quezon City e-mail: etch_at_ginto.chem.admu.edu.ph
>Philippines FAX: (632) 426-1323
>------------------------------------------------------------------------------
>
PEACE
********************************************** Wishing you a Very Happy
New Year ******************************************************
Dr. Sandip K. Sur
NMR Manager and NMR Application Scientist
Department of Chemistry
University of Rochester
Rochester, NY 14627-0216
Note: New Area Code 585
Tel: (585) 275-4705 (W)
Fax: (585) 473-6889
Email: sur_at_chem.rochester.edu
Received on Wed Jan 09 2002 - 09:03:21 MST