Thermonicolet Omnic Software User's Guide 6.1 (PDF) - Charles E ...

You can position the annotation
by using the annotation tool.
You can label another peak with its height by repeating steps 1 and 2. After you
click the Annotate button, the annotation remains on the screen when you label
another peak. When you are finished labeling peaks, you can print the spectrum
with all the height (and other) annotations by using Print in the File menu.
Note
When you save a spectrum, its annotations are saved and will be displayed when
you later open the spectrum. ▲
Peak height tool You can measure the height of a peak from zero absorbance (or 100%
transmittance), without regard to the position of the baseline, or from the baseline.
The latter measurement is called the “corrected peak height.” The peak height tool
lets you find the height of a peak measured from a baseline connecting the low
points on either side of the peak (high points are used if the spectrum is in %
transmittance). You can adjust the baseline and the peak location to define the
peak height you want to measure (this is explained in the procedures that follow).
The tool also finds and displays the X and Y values of the peak and the
uncorrected peak height. The uncorrected peak height is the height measured from
zero (or from 100% in the case of a transmittance spectrum).
By using the Annotate button after peak height measurements, you can annotate
peaks with their corrected heights and then print the spectrum with the annotations.
Note
You can use Options in the Edit menu to specify the text orientation, font and number
of decimal places for annotations. See “View options” in the “Edit” chapter. ▲
Measuring the height of a peak – Follow these steps:
1. Select the spectrum that contains the peak of interest.
To make it easier to see the peak, you can enlarge the portion of the spectrum
that contains the peak by using the view finder or selection tool.
2. Select the peak height tool.
32 Thermo Nicolet