To Switch From The Ei Mode To Ci Mode - Agilent Technologies 7200 Operation Manual

To Switch from the EI Mode to CI Mode

Always verify GC/MS performance in EI before switching to CI operation.
C A U T I O N
Always wear clean gloves while touching the analyzer or any other parts that go inside
C A U T I O N
the analyzer chamber.
Procedure
1
2
3
4
5
6
7
Table 8
Reagent gas
Ion polarity
Abundance target
Peakwidth target
Maximum repeller
7200 Accurate-Mass QTOF Operation Manual
Change the source. See
Load a suitable PCI or NCI method for use with the CI source.
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.
Select the Tune from default settings check box because you have changed the
ion source.
Select Print autotune report check box to automatically print a tune report.
Click the Autotune button to start the autotune. At the completion of the
autotune, a Tune Report is printed.
Review the Tune Report. If the results are acceptable, save the autotune by
clicking the Files and Report tab, then click the Save button.
Default Tune Control Limits, used by CI autotune only
Operating in Chemical Ionization (CI) Mode
"To Change the Ion Source"
Methane
Positive Negative
6 6
1x10 1x10
0.7 0.7
4 4
on page 78.
Ammonia
Positive Negative
6
N/A 1x10
N/A 0.7
N/A 4
4
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