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13
Frequently Asked Questions
148
Q.
Why would an Extracted Ion Chromatogram (EIC) be used
instead of a Total Ion Chromatogram (TIC) for
quantitation?
A.
An EIC gives more stable results compared to the TIC.
Q.
If autointegration does not work on a peak, can it still be
integrated?
A.
Yes, the peak can be integrated manually. For some cases,
manual integration mode is the only method to use. Turn
on manual integration under Tools > Options > A/B. Select
the area of the peak that you would like to integrate. Refer
to the online help for complete instructions on how to
manually integrate.
Q.
How can integration results be exported?
A.
Click Chromatogram > Integration Results... Tabulation of the
integration results associated with the current data file is
displayed. Click the Copy button to save tabulated data to
the clipboard. Now the results can be pasted into another
application package.
Q.
How can chromatogram graphics be exported?
A.
To copy a selected Data Analysis window to the clipboard
use the Tools > Copy Window menu. Answer the prompt for
the number of the graphics window to be copied ('1' for
spectrum, '2' for TIC). Click OK to copy the selected window
to the clipboard. Now the graphics can be pasted into
another application package. Alternatively, right-click Data
Analysis, right-click in the window of interest, and copy and
paste the image into another application.
Q.
Why are the integration results on the quantitation report
and my integration results different?
A.
Integration results on the quantitation report are
generated using the extracted ion chromatogram (EIC) of
the target ion specified in the compound on the first page
of the quantitation database while the integration results
generated manually are based on the total ion
chromatogram (TIC). Specific integration events can be
used to integrate if the compound data file is specified on
the third page of the quantitation results database. If the
extracted ion chromatogram and the total ion
chromatogram use the same integration event file, you may
get the same integration results.
Q.
Why would the chromatogram show a peak if the
quantitation report shows a N.D?
Agilent G1701EA MSD Productivity ChemStation Familiarization Guide
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