INFICON HAPSITE ER Chemical Identification System - Manual (Page 307)

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HAPSITE ER Operating Manual
9.7.1 RIC Plot to Locate Specific Compounds
NOTE: Before running NIST, position the scan cursor over the peak of interest in
the TIC plot.
1 Either from the System Setup View or the Data Review screen, double-click on
the NIST icon. See
Figure 9-21 .
Figure 9-21 NIST Icon
2 Click on the NAMES tab at the bottom of the NIST screen. See Figure 9-22 .
Figure 9-22 NIST Names Tab
3 Enter the name of the compound, to be located, in the box on the top left of the
screen. EXAMPLE: Benzene. See
Figure 9-23 .
Figure 9-23 NIST Name Entry
4 The spectrum and information about the compound will appear in the two boxes
to the right of the names column.
5 In the bottom right box, the 10 Largest Peaks will be listed. Make a note of the
three largest mass peaks that are between 45-300 AMU.
NOTE: Peaks are listed in order from the largest to the smallest. EXAMPLE:
Benzene's three largest peaks are masses 78, 77 and 51. See Figure
9-24 .
Figure 9-24 Top 10 Masses
6 Minimize the NIST window and return to the ER IQ Data screen displaying the
TIC chromatogram.