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

Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning

Reducing Oxide Ions

When changing tuning parameters to achieve greater sensitivity, you can
inadvertently increase the level of oxide ions. The Sensitivity tuning window can be
used to check for oxide ions, but ChemStation provides another window with the
mass values already set for the standard tuning solution, 10 parts per billion (ppb) of
Li, Y, Ce and Tl. This procedure explains how to identify and reduce oxide ions
using the Oxide Ion tuning window.
To identify and reduce oxide 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>>Oxide Ion.
The ICP-MS Tuning-Oxide Ion window appears showing the real time display for
an oxide ion. The window is similar to the Sensitivity tuning window, but the m/z
channels are different.
ICP-MS Tuning-Oxide Ion Window
4-12