Department of Chemistry,
University of Alberta November 2002
NMR News 2002-04
News and tips for users of the Varian NMR systems in the
There are no fixed publishing dates for this newsletter;
its appearance solely depends on whether there is a need to present information to the
users of the spectrometers or not.
Other content of this NMR News is no
longer meaningful and has been removed April 2010.
forms are now available on the web
If you decide to submit a sample for NMR service, a form needs to be
filled in which is now available in
PDF format on the web.
You can print out a copy and then make as many photocopies as needed. Of course,
the same form is also available at the sample drop-off point in WB-13. Please fill in as much information as you
possibly can. This will not only increase the quality of the service you
receive but also assist in planning the large number of samples that are
information on sample preparation is also available.
For people joining the Department a PDF form to obtain
keys to the
NMR labs and the ibd5 sign-up
sheet are available as well. They can all be found easily on the NMR web pages, simply go to FAQs
and click on "forms for NMR …".
and shimming without a sample
is not a frequently asked question but appears to become quickly a common error.
Some users think that tuning and shimming can be done without a sample in the
magnet. This is total nonsense. The sole purpose of tuning and shimming is to
optimize the probe for a particular sample, that is the magnetic properties of the
solvent, what is dissolved in it and the properties of the NMR tube (tubes
appear to be the same but they are not). Trying to do
this without a sample defeats the purpose, can lead to terribly
mistuned probes and is therefore best avoided at all
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