Dear all,
Yes the outer lines of a septet can be hard to see (ratio 1:6:15:20:15:6:1).
It might be worth mentioning that for nuclei such as carbon, silicon etc.
(low gamma, low isotopic abundance, chemical shifts no so dependent on the
conditions) one can add to the spectrum already acquired by restarting and
continuing with “go” instead of “zg” to save
time and not waste what was already acquired (sure, you can always acquire
separate spectrum and add them together too). It works extremely well even
after ejecting the sample and running something else (apart from locking
onto the same solvent obviously, the rg value must be the same) and we use
it often. Before we installed an autosampler we had a macro running just for
this purpose so that users did not have to wait till the night to start their
long run just in case someone needed a quick run (i.e., the user of the
short run would halt the long run, run their spectrum and then restart the
long run, all they had to do was return to the long spectrum and lock on,
the macro took care of everything else). Often after a few hours the spectrum
was good enough so the long run user got their spectrum that day instead
of waiting till the next day or their spectrum the next day was really
good even with an interruption of the run the day before.
On this note, it would be great if a “go” option could be
implemented in ICON NMR. Even better would be if an option was available where
when selected a user could put on a long run and when another user wanted a
short run the long run would be interrupted automatically (or with halt),
the short run acquired and then the long run automatically continued on
with (or an option to continue with more short runs before continuing the
long run). This would really maximise the efficient use of NMR. And the
option should be available not just for 1D spectra, but also 2D spectra.
Regards,
K. Klika
________________________________________
> From: main_at_ammrl.groups.io on behalf of Blumenfeld, Alexander
> Sent: 14 May 2024 17:48:50
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] Assistance Needed: 29Si Experiment Issues #Bruker
Hi Muhammad,
This is to issue 2. The intensities of a standard five lines (4 protons) should
be 1:4:6:4:1, which obviously is not the case. The heptate intensities should
be 1:6:15:20:15:6:1. There are very weak lines barely seen at the sides of
"pentate". Just double (or triple) the number of scans, I am sure, you will
see all lines.
Good luck!
Alex
Alex Blumenfeld
NMR Lab Manager
University of Idaho
Moscow, ID 83844
208-885-9235
________________________________
> From: main_at_ammrl.groups.io on behalf of Bob Berno
> Sent: Tuesday, May 14, 2024 6:52 AM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Assistance Needed: 29Si Experiment Issues #Bruker
Hello Muhammad, From the email thread, it looks like Issue 2 has been resolved.
You just need to tease the signal of the smallest peaks out of the noise, either
by recollecting the data with better S/N or perhaps by some processing tricks.
Hello Muhammad,
From the email thread, it looks like Issue 2 has been resolved. You just need to
tease the signal of the smallest peaks out of the noise, either by recollecting
the data with better S/N or perhaps by some processing tricks.
Regarding Issue 1:
You did not give any details about TopSpin version or operating system, but
I think I may have an idea why you need to keep running ATMM. You say that
you run ATMM and "save" the values. But do you know for sure that the file
containing the tune/match settings for 29Si have indeed been saved? I don't
remember where those files get stored, but maybe when it tries to save those
settings, you don't have permission to create and save a new file in that folder.
All other existing nuclei work fine because they already exist.
Does that make sense?
Bob.
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Received on Tue May 14 2024 - 08:33:19 MST