Hello everyone.
We have been using the wet solvent suppression sequence for suppressing
the water resonance in 1D proton spectra. When we do this on our pfg id
probe on the Varian Inova 500 we observe a distortion on resonances
removed from the suppression point. The distortion is most noticeable on
sharp intense singlets. Such a distorted singlet seems unusually sharp on
one side and has a marked negative spike, whilst the other side is normal
or maybe somewhat broadened. Its like I've applied resolution enhancement
to one side of the resonance and line-broadening to the other side! The
effect is present even using only one transient and no steady state
pulses.
Has anyone seen this and if so an explanation? It would also be nice with
a solution as well!
best wishes,
David Grace
Nycomed Amersham
Manger NMR group, Oslo, Norway
voice +47 23185006
fax+47 23186014
Received on Wed Sep 06 2000 - 10:29:02 MST