Date: Mon, 14 Nov 2022 15:46:38 -0500
Update:
It was suggested to check the 90 to see if the amplifier, synth board or
something else might be slowly failing.
Using the Autotest sample, I got the following artifacts in my fid that
surely has something to do with it. Though I'm not sure what would cause
this... Any ideas?
[image: image.png]
On Mon, Nov 14, 2022 at 1:32 PM Kenneth Sharp-Knott <kknott_at_vt.edu> wrote:
> This weekend our Agilent MR4DD2 began to act up. The proton spectra look
> pretty terrible.
>
> Here is an example of a 1H spectrum I'm getting right now. This is
> Sucrose. Every proton basically looks like this. Carbons look just fine.
>
> [image: image.png]
> FID
> [image: image.png]
>
> However, decoupling seems to be fine as per this C13 spectra of Surcorse
>
> 13C Decoupled
> [image: image.png]
> Looks normal
> [image: image.png]
> 13C Uncoupled (for comparison).
>
> I've looked at some of the console outputs from the RefGen, Synth board,
> etc. and they all seem normal. I would suspect the 1H amplifier might be
> the issue but since decoupling is fine, I suppose that unlikely.
>
> I guess I'm thinking 1H preamp at this point? Any thoughts?
>
> --
> Ken Sharp-Knott
> Manager of Analytical Services and the NMR Facility
> Department of Chemistry
> Virginia Tech
>
> (540)267-6502 (Cell)
> (540)231-0885 (Office)
>
-- 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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