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IPN 074-397-P1G
HAPSITE Smart Operating Manual
The spectrum must be recorded to the library. Highlight the spectrum window and
click the right mouse button to bring up the spectrum menu. Highlight Grab
Spectrum for Template to record the spectrum. Refer to Figure 6-5.
The compound is displayed in the Analytes in Library list and the extracted mass
values are displayed. A compound name can be entered and the extracted mass
list can be "cleaned up". To edit the extracted mass list, all masses with intensity
below 15% should be deleted. To delete a mass, click once on the mass in the
Extracted Mass Peaks list and press the delete key. After adding all analytes to
the template, the library can now be calibrated by checking the Selection box for
the data file, selecting Calibrate Library, and then pressing Start.
The library should be saved at this time, the Save Library button under Method will
display the dialog box to save the library. The library is linked to the method and
can be saved using any name.
Additional calibration points can be added to the curve by using the Browse button
to select additional data files and then processing them as described above, and
saving them to the library. See Figure 6-6.
Figure 6-6 Additional Calibration Points
Additional compounds are added by following the same steps.
NOTE: The Reset Library function is used to delete all calibration curves for all
compounds and should only be checked when this action is necessary.
6.3 GC/MS Methods
GC/MS is a reliable means of identifying volatile organic compounds. The sample
is drawn in through the probe or other sampling accessory and passed through the
GC, where the sample is separated by boiling point and sent to the Mass
Spectrometer. The GC separates VOC mixtures into individual component for
Mass Spectrometer detection. Compounds are positively identified by GC retention
time and mass spectra.
GC/MS Methods provide identification of compounds by extracting target mass
ions from the MS response or as a result of searching the total MS response
against the AMDIS and/or NIST libraries. GC/MS Methods can use Selected Ion
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