Thermo Scientific Nicolet iS50 User Manual page 14

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iS50 ATR Module
12 iS50 ATR Module User Guide
Table 5. iS50 ATR Touch Point Settings
Option
Background handling
Analyze Measured
Sample
Description
Lets you specify when to collect a background spectrum to be
used for ratioing sample spectra you collect. Collecting a
background after a specified number of minutes is a good
choice for many applications. You will be prompted to collect a
background the very first time you collect a sample spectrum.
Allows you to select and run analyses on the collected sample
spectrum. The analysis results are attached to the spectrum
and saved in the spectral (.spa or .spg) file. The following
analyses are available:
• Quantify. Finds the concentrations of components in a
sample spectrum. For more information, open OMNIC
Help Topics and find the "Quantifying a Spectrum" topic.
To select the quantitative analysis method you want to use
to quantify a spectrum, choose Analyze > Quant Setup.
• Search. Identifies an unknown material by comparing the
unknown sample spectrum with each reference spectrum
in the selected libraries to find the spectra that most closely
match the unknown. For more information, open
OMNIC Help Topics and find the "Searching a Spectral
Library" topic.
Use Analyze > Library Setup to select the reference
libraries to be searched.
• QCheck. Compares spectra to determine their degree of
similarity, expressed as a correlation value from 0.0 (no
similarity) to 1.0 (the spectra are identical). For more
information, open OMNIC Help Topics and search for
the "Comparing Spectra with QCheck" topic.
Use Analyze > QCheck Setup to set up the comparison.
• Find Peaks. Identifies peak locations in a spectrum by
finding peaks whose Y values exceed a specified threshold
value. The peaks are labeled with their X values. For more
information, open OMNIC Help Topics and search for
the "Finding Peaks Above a Specified Height" topic.
• Threshold. The Y value above which peaks can be
found.
• Sensitivity. Determines how readily shoulders on
peaks and small peaks in the baseline will be found.
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