Hi Wei
I will wait for other wizards to weigh in but I will say that since
MeOD's temperature dependence curve is piecewise linear, that crossover
region of 298 K is a bit iffy. I always use Ethylene Glycol standard for
298K and above. My 2c...
Rajan
On Fri, Aug 18, 2023 at 12:20 PM Walter Zhang <wzhang1001_at_gmail.com> 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
>>
>> ------------------------------
>>
>>
>
>
>
--
____________________________________
Rajan K Paranji, Ph.D.NMR Facility Manager
*Department of Chemistry**Room 65, Bagley Hall*
University of WashingtonSeattle, WA 98195
phone : 206 685 2581 fax: 206 685 8665email: rajanp_at_uw.edu
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Received on Fri Aug 18 2023 - 16:44:20 MST