Dear Bruker Users,
Happy new year:)
I recently run a 1D small organic molecular NMR spectrum on our AV600 with
cryoprobe, when I input "rga" and the automatedly calculated rg was 7. After 3
hours even overnight, we can not get any signal. After increase the rg to 4K, I
can get normal signals but with sinuose baseline. There is an unusual large
spike in the middle of the first fid. There are the 1D spectrum
http://147.8.148.20/public/yyh/1D-C13.JPG and fid pectrum
http://147.8.148.20/public/yyh/13c-fid.JPG
I have tried other 1D 13C pulse program and got the same result at all times. I
also run another sample on the machine, the result was just the same.
However, all 1H proton and dept spectra behave well on the same machine.
Thanks in advance!
Flora
PhD student
The department of chemistry,
The University of Hong Kong.
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