Dear All,
Hope you all had a great summer!
I would like to ask your help to figure out what happened in my
Maganet/probe. I have never seen that a probe could be burned like this
way. First let me briefly describe the "crime scene".
1. A standard NMR tube was melted inside of the probe. The probe is Varian
400MHz AutoSW PFG. The tube does not broke, just melted.
2. A piece of broadband coil (inner coil) was fused within the glass of the
NMR tube.
3. The shimming coil is intact.
4. The glass tube/connection of VT connect is intact.
5. Gradient is off.
6. HMBC experiment was ran. parameter such as: pw (11), tpwr (58),
decoupling power (pwx:59 pwxleve:9.6) are all within the limit.
7. All components in console are all working.
8. Sample was ZnC-PEG, solvent was CDCl3.
If you had the same experience, please let me know what your finding was.
Also, any clue, input, or suggestions is appreciated. I am now clueless
what could possible generate so much heat inside of the probe. If you
interested to see the pictures of the tube and probe, please click the link
below, you will be surprised.
Probe Burned
<
https://docs.google.com/a/ncsu.edu/folderview?id=0B1pwZEOp3M2OZVFFeWpfSlZRRTA&usp=drive_web>
Thank you so much!
Jennifer
Received on Wed Sep 24 2014 - 06:19:59 MST