Hey gang,
I am wondering if someone has encountered this problem before and got a
solution for it. We are taking 13C spectra of carbohydrates disolved in
non-deuterated solvents. The solvent peaks are not in the range of the
sugar peaks, but since the ratio of sugar peaks vs. solvent peaks is
1:100, the artifacts (spikes) originating from the solvent peaks start
showing at regular intervals in the sugar region after extended
accumulation. They are small enough not to be a major problem, and we
can identify them because they are always there no matter which sugar
you are analyzing, but they don't look all that pretty.
Is there any post-processing trick to remove these things? The data is
being collected on a Bruker AVANCE 400, but due to the chemical shift
range of the solvent we cannot use DQD. My solution so far is to record
a spectrum of the neat solvent with the same number of scans and
substract this from the spectra of the sugars. This works, but I'd like
to avoid doing it if there's an alternative solution.
TIA,
Guillermo
+==================-------------- --- -- - - - -
Guillermo Moyna, PhD
Assistant Professor of Chemistry
Department of Chemistry & Biochemistry
University of the Sciences in Philadelphia
600 South 43rd Street
Philadelphia, PA 19104-4495
"The only existing things are atoms and empty space.
All else is mere opinion" - Democritus, 370 B.C.
Office: Griffith Hall 360
Phone: (215) 596-8526
Fax: (215) 596-8543
e-mail: g.moyna_at_usip.edu
WWW:
http://tonga.usip.edu/gmoyna/index.html
http://www.usip.edu/chemistry/faculty/moyna.asp
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Received on Fri May 07 2004 - 16:29:26 MST