Hi Ken,
Start iconc and go to Lock/Shim options.
Turn off Lock only after a solvent change. That might help.
Best,
Jeff
________________________________
> From: main_at_ammrl.groups.io on behalf of Kenneth Sharp-Knott via groups.io
> Sent: Wednesday, November 5, 2025 3:12 PM
> To: main_at_ammrl.groups.io
> Subject: [AMMRL] Incorrectly refereced C6D6
Forgive me, I feel like this is something I should know....
I've been working with a C6D6 sample today and about ½ the time it's
completely incorrectly referenced to the point that ½ of it is off the
scale. The samples are run on Bruker in ICON, yes, I'm selecting the correct
solvent... 🙂 Unfortunately, sometimes it happens during an HSQC
and it gets clipped due to the au program setting the sweep width.
1.
Why does this happen? I assume the referencing is set somehow during the
lock, so I guess it's locking on the wrong resonance?
2.
How can I prevent this?
Ken Sharp-Knott
Manager of Analytical Services and the NMR Facility
Department of Chemistry
Virginia Tech
(540)267-6502 (Cell)
(540)231-0885 (Office)
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Received on Thu Nov 06 2025 - 07:51:57 MST