We dont do the extra mile here but instead have a set of shim values stored for
a standard that can be read in . Shim settings change from sample to sample and
from temp to temp that I dont think it is worth it unless the last person that
used it was trying to do mud. Then again reading in the last shim set should do
it. I usually re-shim the system if I have to take the probe apart or clean
the shims as that will change things sometimes. My biggest problem is trying to
keep the crud out of the spinner turbine holes.
Charles L. Anderson wrote:
> I have always be taught that it is common courtesy to lock and shim on a
> standard before you leave an NMR. This way the person coming after you
> knows what to expect when they set down at the spectrometer. However, I am
> getting the feeling that not all NMR facilities do this. Before I arrived
> here they did not lock and shim on a standard so there has been some
> resistance to this. I would be interested in hearing some input on this
> subject. What do you do in your facilities?
>
> Charles L. Anderson, Ph.D.
> Manager NMR Facilities
> Department of Chemistry
> University of Houston
> Houston, TX 77204-5641
> Office: (713)-743-2728
> Fax: (713)-743-2709
>
> "Anything one man can imagine
> others can make true"
> Jules Verne
--=+=+=+=+=+=+=+=+=+=+=+=+=+=+= Jim Breeyear Univ of Vermont Manager, Inst. Chemistry Dept.