Hi Karel,
It's worth noting that the SampleCase is also much better-behaved with different
spinner weights too - it'll even handle ceramic spinners in automation, without
the need for adjustment.
As far as frozen solutions and the risk of breaking tubes, I'd add methanol
to that list too. My personal success rate for freeze-pump-thawing methanol
samples (ex situ) has not been good, although occasionally you might get lucky.
Thanks
Geoff
________________________________
> From: main_at_ammrl.groups.io on behalf of Karel Klika via groups.io
> Sent: 21 October 2025 15:45
> To: main_at_ammrl.groups.io
Subject: [External] Re: [AMMRL] Facility policies for Variable Temperature Experiments?
Hi Mike,
Thank you very much for the comment. Over the years we have been using manual
insert, BACS, and SampleJet without problem but will be soon getting a new system
with SampleCase so I take your advice on board and will be extra vigilant going
forward.
Cheers,
Karel
________________________________________
> From: main_at_ammrl.groups.io on behalf of Michael Groves via groups.io
> Sent: 21 October 2025 17:00:48
< To: main_at_ammrl.groups.io
Subject: Re: [AMMRL] Facility policies for Variable Temperature Experiments?
Hi all,
I have one note regarding what Karel said. Regarding point 1--"they can easily
be taken safely above and below by a fair margin..." This depends somewhat
on the configuration of your system. If you have a samplecase sample changer,
the tolerances are tight enough that if you heat the blue spinners much over
their limit (80C) they will deform enough to render them unusable with the
samplecase. If you're inserting samples manually they'll likely be okay but
we have seen this cause problems with that sample changer.
Cheers,
Mike
________________________________
From: main_at_ammrl.groups.io on behalf of Kenneth Sharp-Knott via groups.io
> Sent: Monday, October 20, 2025 10:46 AM
> To: main_at_ammrl.groups.io
> Subject: [AMMRL] Facility policies for Variable Temperature Experiments?
We're revamping and/or putting in place various policies/procedural documents
now that we have moved on from the Era of the Flood and into the Era of
Shiny New NMRs.
I'm curious what kind of specific guidelines you have in place for variable
temperature NMR?
*
Do you require a specific grade of NMR tube?
*
New NMR tubes?
*
What buffer do you allow between the solvent freezing/boiling point and the
target temperature? 10, 15, 20 degrees?
*
Anything else I'm missing?
Thanks in advance!
Ken Sharp-Knott
Manager of Analytical Services and the NMR Facility
Department of Chemistry
Virginia Tech
(540)267-6502 (Cell)
(540)231-0885 (Office)
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#2939): https://urldefense.com/v3/__https://ammrl.groups=
.io/g/main/message/2939__;!!PvDODwlR4mBZyAb0!S7lpKA-MDCnhjF3xlgkQXG6lcPQXVf=
OxR0xpVixiiQrIAhIVrTdqxlM00su3g3NOxTDIOqULFJNjfTpODLOg31WYfnPd$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/115855153=
/7559972__;!!PvDODwlR4mBZyAb0!S7lpKA-MDCnhjF3xlgkQXG6lcPQXVfOxR0xpVixiiQrIA=
hIVrTdqxlM00su3g3NOxTDIOqULFJNjfTpODLOg3wJ4825V$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-
Received on Tue Oct 21 2025 - 09:20:40 MST