Hi Weixing
if you do this on a cryoprobe this will be the expected result. 80% Glycol
gives a massive amount of radiation damping. This leads to different readings
as shown by Stefan Berger in
https://doi.org/10.1002/mrc.1941
You can try to run a more accurate measurement by massively detuning the probe.
With best regards
Clemens
On 8/18/2023 3:09 PM, Walter Zhang wrote:
Dear All,
I need to use 80% Ethylene Glycol for high temperature calibration.
Before I do the calibration, I compared it with 99.8% MeOD at 303 K.
When I set temperature to 303 K,
99.8% MeOD gives 303.03 K while 80% Ethylene Glycol gives 300.57 K
The difference between the two calibration samples is 2.46 K.
Is this normal?
Your comments are appreciated!
Best regards,
Weixing Zhang
St. Jude Children’s Research Hospital
Memphis, TN 38105
USA
________________________________
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Clemens Anklin Ph.D. Vice President
Bruker BioSpin NMR Applications & Training
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Received on Fri Aug 18 2023 - 16:44:20 MST