Try cpmg1d with d20 set to about 1 ms or so. zgbs also does a decent job.
Thanks,
Thomas
Thomas K. Weldeghiorghis, Ph.D.
Director, NMR Facility
Department of Chemistry
Louisiana State University
232 Choppin Hall
Baton Rouge, LA 70803
225-578-5346
________________________________
> From: main_at_ammrl.groups.io on behalf of Matthew Devany via groups.io
> Sent: Saturday, May 9, 2026 8:34 AM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] 19F peaks issue
Purush,
What you see there is background from the probe(solid teflon or other
PFAS). Try to use narrower windows, avoid that section of the shift
range if possible, and correct baseline with the macro abs.13c.
Matthew
On 5/8/26 16:59, pothula purushotham reddy via groups.io wrote:
>
>
> Hi there,
>
> I am measuring *¹⁹F NMR* on a *Prodigy probe* at *400 MHz*, but the
> spectra look strange/weird. Does anyone know what might be causing
> this or how to fix it? Any suggestions would be greatly appreciated.
>
> Thank you!
>
>
> 19F.png
> Best
> Purush
>
--
*Matthew Devany, Ph.D.*
Director NMR Laboratory -- Department of Chemistry, Hunter College of
the City University of New York
695 Park Ave., Rm. N1302 -- New York, NY 10065
Lab: 212-772-5337 -- Fax: 212-396-6327 --
https://hunter.cuny.edu/artsci/chemistry/research/nuclear-magnetic-resonance/
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Received on Sat May 09 2026 - 15:56:15 MST