Last night I ran a 13C spectrum on an unusual organometallic
which was expected to give a signal down near 300ppm. I usually
run 13C with AQ_mod = DQD and I get nice clean spectra. For
this spectrum, I used a sweep width of 320ppm or 32000 Hz so
I was forced to use AQ_mod = qsim. The sample was dilute and
the spectrum showed a number of noise glitches that were on
the same order of intensity as the real signals. Most of them
could be distinguished by their phases, but here is my question:
What is the optimum combination of AQ_mod, DIGMOD, etc. for
obtaining clean spectra with large sweep widths?
Thanks in advance.
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Donald M. Leek
Steacie Institute for Molecular Sciences
National Research Council Canada
Ottawa, Canada K1A 0R6
phone: (613) 993-6356
fax: (613) 952-0068
email: leek@ned1.sims.nrc.ca
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