[lespaul]

Hi Everyone,

Im analyzing some FTIR data collected on OMNIC 8.2. In the software there are several options in which you can view the spectra - namely, Full scale, Common scale, or Match scale.

I understand how to use the first three, but I dont understand when I would use the Match scale in the real world. Below is the textbook definition of the feature, but can anyone give me a real world example on when I would use this. It seems easier to simply make comparison of peaks heights using the common scale feature.

Use Match scale in the view menu to display all the spectra in a spectral window using minimum and maximum Y values of the selected spectra as the Y-axis display limits. This make it easy to compare their relative heights visually.

Thanks

[marquis]

Didn't use omnic software.  But I did use similar software on another system.

When comparing an unknown to a library search result, you usually want to
measure peak intensity of both compounds as well as peak location.  I think
the match command allows you to do this by putting both spectrum on the
same scale. 

I.e. the same peak location, but the relative peak heights aren't the same, it
isn't a match.  Or at least it deserves further investigation.

Good luck.