Download Ion Max APPI Source User Manual Version C

5
Optimizing the LTQ MS Detector with Your Analyte
Setting Up the MS Detector for APCI/APPI/MS Operation
Figure 30. Define Scan dialog box, showing typical settings for APCI/APPI/MS operation
g. In the Source Fragmentation group box, confirm that the On check
box is not selected ( ) to specify that the ion source fragmentation
option is turned off.
h. In the Scan Ranges group box, in the Input list box, select
Center/Width to make available the Center Mass and Width text
boxes in the Scan Ranges table.
i. In the Scan Ranges table, in the Center Mass text box, enter 609.20
to set the center mass for the scan range to m/z 609.20.
j.
In the Width text box, enter 2.00 to set the width of the scan range
to m/z 2.00.
k. Ensure that the settings in your Define Scan dialog box are the same
as those shown in Figure 30.
l.
Click OK to apply the MS detector scan parameters and to close the
Define Scan dialog box.
5. On the Control/Scan Mode toolbar, click Centroid/Profile to toggle
the data type to centroid. The picture on the button should be the same
as that shown here.
6. Click Positive/Negative to toggle the ion polarity mode to positive. The
picture on the button should be the same as that shown here.
You have now completed setting up your MS detector for APCI/APPI/MS
operation.
Thermo Scientific
APPI Souce User Manual
57