7
Optimizing the MS Detector with Your Analyte in APCI/MS Mode
Setting Up the MS Detector for APCI/MS Operation
Thermo Electron Corporation
LTQ XL Getting Started
121
Figure 59.
Define Scan dialog box, showing typical settings for APCI/MS operation
g. In the Source Fragmentation group box, confirm that the On check
box is clear (
) 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 group box, in the Scan Ranges table, in the
Center Mass text box, type
609.20
to set the center mass for the
scan range to
m/z
609.20.
j.
In the Width text box, type
2.00
to set the width of the scan range
to
m/z
2.00.
k. Verify that the settings in your Define Scan dialog box are the same
as those shown in
.
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).
