Hi Ken,
I don't have a BST (we still have a BACS!). In the past, I have used a piece
of solid copper wire (extracted from 12 gauge Romex or equivalent) or ¼ inch
wooden dowel rod with a loop of scotch tape (sticky side in) just the right
diameter (ca. 1.5 cm) to go easily down the bore and not catch on the tube cap
(Note, you want a wrap or two around the rod/wire first to have a good grip).
I then gently twist to get the tape to stick to and wrap around the tube.
It then easily lifts out.
All the best,
Rick
Richard W. Fitch
Professor, Department of Chemistry and Physics
Councilor, Wabash Valley Section, American Chemical Society
Indiana State University
600 Chestnut Street
Science Building, Rm. S35E
Terre Haute, IN 47809
Phone: (812) 237-2244
Fax: (812) 237-2232
"Do an apparently simple experiment that gives you an important bit of information..."
Julius Axelrod
The love of money is the root of some evil. Fear and insecurity are the ro=
ot of most of it.
> From: main_at_ammrl.groups.io On Behalf Of Sham, Shing via groups.io
> Sent: Monday, August 11, 2025 3:12 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] Stuck sample is BST with SampleMail in the way
Hi Ken,
I assumed you also tried to increase the lift air pressure to see it helped
If not, like Brian said, take the probe out.
I did it once many years ago with RT probe but I pushed the sample down from
the top.
I wrapped a very thin wooden dowel with kime wipe, and pushed the sample down
VERY gently and slowly. I had someone catch the sample from the bottom.
Good luck,
Simon
________________________________
From: main_at_ammrl.groups.io on behalf of brcherry via groups.io
> Sent: Monday, August 11, 2025 1:41 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] Stuck sample is BST with SampleMail in the way
In these situations, I remove the probe. Then use a flexible non-magnetic
rod from the bottom. If you have the "dipstick" for LN2, that works great
as it's just flexible enough. I put a rubber pipette bulb over the end and
snip the bulb portion off. this makes a great catcher to not let the NMR
tube slip sideways, and you can push the sample/spinnter out the top. that
way you do not have to remove the changer or BST.
Brian
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Received on Mon Aug 11 2025 - 14:19:15 MST