Simple 1D processing in vnmr
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====Fine-tuning phasing==== | ====Fine-tuning phasing==== | ||
| + | This part is relevant if peaks that you want to phase are less intense then the major peaks in spectrum. | ||
| + | Adjust vertical scale so that you can see peaks of interest: | ||
Revision as of 23:27, 3 March 2008
Contents |
Open file
Open file (type in vnmr command line):
rt('file_name')
rt - retrieve, file name does not have to have .fid attached
Apply simple FT
Apply simple processing:
ft f full vsadj
ft - apply Fourier tranform
f - show full 1D spectral window
full - stretch spectrum on full screen
Phase the spectrum
Autophasing
Try automatic phasing
aph
Manual phasing
If autophasing fails, you have to phase manually.
Click on Main Menu(top row of buttons)->DispMenu(bottom row of buttons->Interactive(bottom row)->Phase(bottom row)
Move cursor to the left part of spectrum, click and hold left mouse button.
Drag mouse up or down to make peaks in left part appear phased, release left mouse button.
Move cursor to the right part of spectrum click and hold right mouse button.Drag mouse up or down to make whole spectrum well phased.
If you still see huge baseline distortion - it is possible that phase parameters lp(left phase) and rp(right phase) are too large. You can check what they are by typing:
lp? rp?
Normally they should not exceed ~360 (?)
If rp or lp are too large - reset them:
lp=0 rp=0
Fine-tuning phasing
This part is relevant if peaks that you want to phase are less intense then the major peaks in spectrum.
Adjust vertical scale so that you can see peaks of interest:
