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I am very new to NMR and have little experience of it. However I am trying to use it to determine the composition of a mixture. A spectra which I have just obtained contains negative peaks which are giving me incorrect inegrals.

What would cause this? and is there any way to correct it? I can't find much in literature regarding this.

Thanks for your help


asked Jun 21 '11 at 02:39

Dean%20Woods's gravatar image

Dean Woods

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Is your spectrum a standard 1D proton measurement? If so, you probably just need to correct the phase manually (0 and 1st order)


answered Jun 21 '11 at 04:49

Sylvain%20Demanze's gravatar image

Sylvain Demanze

i don't remember what can cause that but i had the same problem for my NMR 19F 1D but you normally will found the answer on internet. To correct this, as sylvain said, you just have to correct the phase manually : "processing / phase correction" or "ph" - Assma El (Jul 18 '11 at 01:58)

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