Department of Chemistry,
University of Alberta March
NMR News 2006-02
News and tips from the NMR support group for users of the Varian NMR systems in the Department
Editor: Albin.Otter@ualberta.ca http://nmr.chem.ualberta.ca
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 May 2010.
default parameters in EZ NMR
(1) efficient suppression of the
residual solvent peak without using too much power requires at least a 2:3 ratio
of d1 (when the decoupler is on) vs. at (when the
decoupler is off). This is preferable over increasing the decoupler
power which leads to attenuation, possibly full suppression, of peaks
close to the solvent signal.
(3) u500, ibd5 and i600: fn = 16K resulting in 0.7, 0.7 and 0.9 Hz/pt digital resolution, respectively; i300, i|m|s400: fn = 8K resulting in 0.9 and 1.2 Hz/pt digital resolution, respectively
As a remainder, fn cannot be set to any number like np, only multiples of 2 are possible. This entails slightly different values for dres at different fields (= different sweep widths!).
Information on how to set up and use remote NMR data processing (for PCs
Thanks to Doug Burr in Dr. Vederas' research group for providing the information for the Mac computers.
Information about NMR data processing with third party software
The NMR support group does not provide help and support for any such packages but certainly does not want to hold anyone back from working with NMR software other than VNMRJ. The most common advantage of such software packages seems to be the ability to create spectra for easy inclusion in reports and publications. As a reminder this can be done in VNMR by printing to a file in postscript format. After that there is virtually no limit on what can be done with the file inside a program like, for example, Corel Draw. One important point: inside the NMR data system, data are backed up daily. Whatever you put on your own computer is, of course, no longer part of this safe-guard against data loss, in other words it becomes entirely your responsibility.
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