We only run J-Young tubes without the sample changer. I found that a long
piece of string tied to the valve makes it easy to pull the sample out of
the magnet without having to change the gas pressure.
Just make sure you tie the other end of the string to the magnet, i.e., the
rigging loops. Don’t ask why…
Best Regards,
Jürgen
_______________________________________________
Jürgen Schulte, Ph. D.
NMR Specialist
Binghamton University
SN Building, RM 1024
25 Murray Hill Road
Vestal, NY 13850
Ph.: 607-777-4405
Fax: 607-777-4478
schulte_at_binghamton.edu
<
http://nmr.binghamton.edu/Schulte.html
> From: main_at_ammrl.groups.io On Behalf Of Timmermann, Vanessa via groups.io
> Sent: Thursday, May 16, 2024 4:24 AM
> To: main_at_ammrl.groups.io
> Subject: [External Email] Re: [AMMRL] Bruker Spinners #Bruker #Hardware
I have seen a variety of issues over the time but not found a fix either.
The only suspicion I have is that maybe the lighting may play a role. I
believe some people have had issues with the loading when it was very sunny
and brighter in the room than usual. But I've never found any consistency
in the failures (apart from absolute struggles getting a ceramics spinner
with J-Youngs tube ejected even without a sample changer...).
As long as you have set the gas pressure to (just about) work with the heaviest
(presumably POM) spinners and the others don't shoot out or wobble too much
with it, you should be able to exclude weight as an issue (assuming the
majority of tubes aren't too different in weight).
On the different shapes Todd mentioned, Bruker started producing the ones
with groves particularly for 400MHz or smaller magnets I believe and the
straight ones are for 500MHz+. There are two different items available
on the website and the 500MHz and higher ones are around $100 more expensive
from what I can see, although the other ones don't specify a MHz bracket.
The sticker can just be replaced and when we had the different spinners they
had the same reflective strips on, so that may just be an age thing.
For your particular case I would assume given the straight ones are slightly
heavier and the yellow strip is thicker it may ever so slightly more often
have issues lifting and spinning it where it needs to detect the sample/spinner
before inserting. Maybe a tiny tweak to the gas flow or separating the
spinners if you have multiple magnets may be a solution if you have consistent
issues with failures?
Vanessa Timmermann
NMR Analytical Lead
Tenax Road, Trafford Park, Manchester, M17 1WT
Vanessa.Timmermann_at_siigroup.com | <
https://www.siigroup.com
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Received on Thu May 16 2024 - 07:08:53 MST