First: I have a problem that is driving me up a tree. It seems that one
of our QE-300's has developed a new signal in the C-13 experiments. It is
at ca. 92 PPM. There is no extra proton signal to go with it and it is not
in the middle of the spectral window (-5PPM to 230 PPM). I feel it is from
an outside source but I am at a loss here. Any help or suggestions will be
gratefully accepted.
Second: One of our groups has been doing some VT work here and they have
started doing the line shape analysis of their data. They have done this
before so we have no problem with that. What we observed was as the temp
went lower our peaks were resolved as expected (many happy faces).
However, at these lower temps we also observed splitting. My question is,
in the line shape analysis of the split peaks do we find the fit and take
the width at half height as we would with no splitting? If there is a
reference out there that deals with this type of analysis let me know.
Thanks for any help with these problems. Happy New Year one and all!
Chuck
See you at the ENC!
Charles L. Anderson, Ph.D.
Manager NMR Facilities
Department of Chemistry
University of Houston
Houston, TX 77204-5641
Office: (713)-743-2728
Fax: (713)-743-2709
"Anything one man can imagine
others can make true"
Jules Verne