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.
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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
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Received on Tue Jan 08 2002 - 08:58:21 MST