Reducing Doubly Charged Ions - Agilent Technologies 7500 ICP-MS Operator's Manual

Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning

Reducing Doubly Charged Ions

When tuning parameters are changed to achieve greater sensitivity, this can
inadvertently increase the level of doubly charged ions. You can use the Sensitivity
tuning window to check for doubly charged ions, but ChemStation provides another
window with the mass values already set for the standard tuning solution. This
procedure explains how to identify and reduce doubly charged ions using the
Doubly Charged Ion tuning window.
To tune for doubly charged ions, complete the following steps:
1 If measuring sensitivity or resolution, click Stop in the Tuning window.
The real-time display is stopped.
2 Select Tune>>Doubly Charged Ion.
The ICP-MS Tuning- Doubly Charged Ion window appears showing the real time
display for a doubly charged ion. The window is similar to the Sensitivity tuning
window, but the m/z channels are different.
ICP-MS Tuning-Doubly Charged Ion Window
4-15