Operating in Chemical Ionization (CI) Mode 4
To Switch from the EI Mode to CI Mode
Operation Manual 83
To Switch from the EI Mode to CI Mode
Procedure
1 Change the source. See “To Change the Ion Source” on
page 94.
2 Load a suitable PCI or NCI method for use with the CI source.
3 Click the MS Tune icon in the Instrument Control panel to
display the Tune dialog box and select the Autotune tab.
The method selects PCI or NCI autotune and the correct
reagent gas.
4 Select the Tune from default settings check box because you
have changed the ion source.
5 Select Print autotune report check box to automatically print a
tune report.
6 Click the Autotune button to start the autotune. At the
completion of the autotune, a Tune Report is printed.
7 Review the Tune Report. If the results are acceptable, save
the autotune by clicking the Files and Report tab, then click the
Save button.
CAUTION
Always verify GC/MS performance in EI before switching to CI
operation.
CAUTION
Always wear clean gloves while touching the analyzer or any other
parts that go inside the analyzer chamber.
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