Department of Chemistry, University of Alberta         November 2002
NMR News 2002-04
News and tips for users of the Varian NMR systems in the Department

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.


bullet NMR-related forms are now available on the web
bullet tuning and shimming without a sample


NMR-related 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 measured daily. General 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 ".

Tuning and shimming without a sample
This 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 times.

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