One comment regarding the offset shifting: I am right now noticing that
that appears to shift the spectra as expected (visually), but that
afterwards the peak selection with the mouse is messed up: it appears to
select the peak in its original location, so off by whatever many points
the spectra were 'offset'*. This applies to selection of existing peaks,
newly picked peaks, and I noticed that the peak frequencies also reflect
the original positions (before the 'offset'). Thus, it appears that the
offset operation only changes the display of the spectrum? I assume this
is not the way it is supposed to function?
Patrick
Patrick van der Wel wrote:
> I have a basic question regarding poorly referenced spectra: suppose I
> know the actual chemical shift of a certain peak, what would be the best
> way of adjusting the spectrum in CCPNMR/Analysis? In the referencing
> pop-up I noticed two possible adjustable parameters: either the
> reference frequency in ppm, or the 'offset in points'. I suppose that
> the latter might be one to adjust in this case? (does it matter?)
>
> I was however wondering if there is a more 'automated' feature that I
> missed, which takes a selected peak and allows one to shift the spectrum
> as required, to get it to match the position in other spectra (or to
> match a known frequency/shift)?
>
> Patrick
>
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