Ken,
I've had this happen in the past with our TCI Cryoprobe (not a prodigy).
The way I corrected it would be to lock onto my "neat" deuterated methanol
standard, turn off the lock, eject the sample, and then put the sample to be
analyzed in, and turn the lock back on. After that, using the lock command
seems to work fine with other d-methanol solvated samples. For me, this usually
happens when someone may have other residual deuterated solvents in the sample,
which can confuse the locking process.
I've never had an issue locking onto my methanol standard, which is supposed to
be 99.99% pure perdeuterated methanol.
Ronald Shin
University of Alabama at Birmingham
Central Alabama High Field NMR Facility
From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Kenneth Sharp-Knott via groups.io
Sent: Thursday, June 22, 2023 10:33 AM
To: main_at_ammrl.groups.io
Subject: [AMMRL] MeOD lock issues on Avance III TS3.6.5 #Bruker
Ok, recently all of my MeOD samples are failing to lock on my Prodigy TCI in
an Avance III running TS3.6.5. These samples lock fine on other instruments.
I can manually set the field and it will lock, but as soon as it locks on another
solvent with another sample, it's unable to apparently find the field automatically
with MeOD. As far as I can tell, the lock phase is ok. 2H tune is spot on.
Any suggestions?
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Received on Thu Jun 22 2023 - 09:00:18 MST