Hi
The other big difference is if you are doing water suppression the high
precision tubes are also quite important , at least in my hands
Regards
Gary
Dr Gary S Thompson NMR Facility Manager
CCPN CoI & Working Group Member
Wellcome Trust Biomolecular NMR Facility
School of Natural Sciences
University of Kent, Canterbury, Kent, England, CT2 7NZ
☎:01227 82 7117
✉️: g.s.thompson_at_kent.ac.uk
orchid: orcid.org/0000-0001-9399-7636
On 20 May 2026, at 03:16, Anklin, Clemens via groups.io wrote:
Hi Weixing
as pointed out by Sameer the Bruker tubes work just fine. But you have to be
aware of the specifications.
The inner diameter variation leads to about +/- 2.5% volume variation. This
is a factor when using external referencing for quatification (eretic 2).
You can correct for it with SOLCOR by Jason Ewanicki et. al.
https://doi.org/10.1002/mrc.5027
Using tuneaxyz in topshim is helpful to improve resolution when using lower
cost tubes.
Clemens
On 5/19/2026 5:02 PM, Zhang, Weixing via groups.io wrote:
Dear Colleagues,
I would appreciate your input regarding NMR tube selection for high-field
applications.
In the past, I routinely used Wilmad 535-PP-7-5 tubes on a 600 MHz instrument
with good results. However, the current pricing of these tubes has increased
substantially. Both Wilmad and Norell now offer tubes specifically marketed
for 800 MHz applications, such as the Wilmad 541-PP-7-5 and Norell S-5-800-7,
but these products come at a significant premium. In practice, however, I
have not often observed these higher-cost tubes being widely used, even on
800 MHz or 1.1 GHz systems.
From your experience, what are the primary risks or limitations associated
with using lower-specification tubes — for example, tubes nominally
rated for 300 MHz — on a 600 MHz instrument, particularly for
quantitative applications such as determining composition and concentration
through signal integration in different samples?
I would greatly appreciate any guidance regarding acceptable tolerances,
observed deviations, or practical trade-offs.
Best regards,
Weixing Zhang
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Received on Thu May 21 2026 - 07:48:04 MST