Hi all,
A user has reproduced a strong singlet centered at o1p in udeft carbon spectra.
I'm reminded of center spectra phantom peaks that appeared on varian's when
number of transients wasn't a power of 2. But those "signals" only contained
a single data point, and in this case the "signal" has plenty of points. It
appears on Mnova, is absent in TopSpin, and we've confirmed independently with
multiple computers. I'm certain it's an artifact rather than sample contents.
What I'm less sure of is whether it stems from the instrument and acquisition
conditions, or file transfer and data processing. We've encountered both sorts
of issue previously. The console's TCU B cable has known problems right now.
If no has heard of this before then I'll push them to repeat the measurement
on a different magnet. They're itching to submit and won't want to chase the
ghost. I just don't want them relying on questionable data.
Kind regards,
Luke
Luke Fulton, PhD
CHEM BLDG R003
NMR Core Facility Director
Unit 3060
COR2E & Department of Chemistry
55 N Eagleville Road
University of Connecticut
Storrs, CT 06279
email: fko24003_at_uconn.edu
(alias): luke.fulton_at_uconn.edu
mobile: (603) 953-5275
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Received on Thu Oct 03 2024 - 15:45:17 MST