Thermo Scientific Nicolet iS50 GC-IR User Manual page 31

Thermo Scientific
Table 9. iS50 GC-IR Touch Point settings
Option
Analyze Measured
Sample
Description
Allows you to select and run analyses on a collected sample
spectrum. The analysis results are attached to the spectrum
and saved in the spectral (.spa or .spg) file.
Note: These settings apply only to single spectra collected as an
.spa or .spg file. The settings are available for GC-IR
applications but not typically used since most GC-IR
experiments collect a series of spectra over a period of time and
save them in a series (.srs) file.
The following analyses are available:
• Quantify. Finds the concentrations of components in a
sample spectrum. For more information, find
"Quantifying a Spectrum" in OMNIC Help Topics.
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, find
"Searching a Spectral Library" in OMNIC Help Topics.
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, find "Comparing Spectra with QCheck" in
OMNIC Help Topics.
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, locate "Finding Peaks Above a Specified
Height" in OMNIC Help Topics.
• 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.
iS50 GC-IR Module
iS50 GC-IR Module User Guide 29