Date: Wed, 23 Aug 2023 08:35:19 +0000
Hi
In
MAGNETIC RESONANCE IN CHEMISTRY Magn. Reson. Chem. 2007; 45: 175–178
Published online 11 December 2006 in Wiley InterScience
(http://www.interscience.wiley.com DOI: 10.1002/mrc.1941 Note A 1H-NMR thermometer
suitable for cryoprobes M. Findeisen, T. Brand and S. Berger∗
There are equations for values measured vs a PRT
In the paper Extension and improvement of the methanol-d4NMRthermometer calibration
Niels Karschin1| Stephan Krenek2| Dieter Heyer2| Christian Griesinger
https://doi.org/10.1002/mrc.5216 MRC 2021 they describe an extension of the temperature
range of D4 methanol from 175 to 338 K against a PRT referencing a national
standard
I haven’t seen published values for ethylene glycol, I presume Bruker measured
their own?
Also I believe that the one of the UK national bio nmr facilities at the Crick/London
in the validated the data in the AU program against there own Dnethylene glycol sample
with a good PRT and found the Bruker values good (I can verify this if you want)
In the au program the reference is for Findeisen Brand , Berger for methanol
Regards
Gary
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Dr Gary S Thompson
NMR Facility Manager
CCPN CoI & Working Group Member
Wellcome Trust Biomolecular NMR Facility
School of Biosciences, Faculty of Natural Sciences
University of Kent, Canterbury, Kent,
England, CT2 7NZ
tel: 01227 82 7117
e-mail: g.s.thompson_at_kent.ac.uk
orchid: orcid.org/0000-0001-9399-7636 http:/orcid.org/0000-0001-9399-7636
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> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> on behalf of Zhang, Weixing via groups.io
> Date: Tuesday, 22 August 2023 at 18:03
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Cc: Bruzzese, Talia <Talia.Bruzzese_at_bruker.com>
> Subject: Re: [AMMRL] 99.8% MeOD vs 80% Ethylene Glycol
Dear All,
Thanks to everyone who has read and replied to my email.
We want to use a CryoProbe to run experiments at different temperatures up
to 90 oC (363 K).
Many people think that radiation damping of 80% ethylene glycol is the problem.
Massively detuning the cryoprobe or using deuterated ethylene glycol should
give more accurate results.
Clemens told me that the Bruker part number of 99% ethylene glycol-d6 is Z10629.
Z10629 is currently under development in Germany and it would be about a month for
it to be completed.
The Bruker AU program calctemp has these options.
[cid:image001.png_at_01D9D4EE.D5E3EE90]
[cid:image002.png_at_01D9D4EE.D5E3EE90]
I am curious where Bruker got the equations from, and I would greatly appreciate any information.
With warm regards,
Weixing Zhang (Walter)
Research Operation Manager
Biomolecular NMR Spectroscopy Center
St. Jude Children’s Research Hospital
Memphis, TN 38105
USA
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