I have been having a really hard time for the last couple of days
shimming on a 4:1 mixture of CDCl3 and CD3OD. After extensive shimming
the line shapes look unacceptable. I have tried locking on both CDCl3
and the CD3 peaks. When I use a mixture of 1:1 mixture of CDCl3 and
CD3OD the spectrum looks perfect. Also, the line shape sample give very
good results, so I can rule out that there is a problem with the current
shimset. Has anyone faced a problem like this before? Any suggestion
will be greatly appreciated.
Thanks,
Dipanjan
Dipanjan Nag, Ph.D.
Director of Instrumentation
Department of Chemistry
University of Nebraska-Lincoln
Phone:402-472-6255
Fax:402-472-6964
Received on Mon Apr 21 2003 - 17:03:18 MST