Agilent Technologies 7500 ICP-MS Operator's Manual page 89

Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning
3 Select Tune >> Acq. Params.
The Acquisition Parameters - Oxide Ion dialog box will appear.
Acquisition Parameters - Oxide Ion Dialog Box
4 Select the check boxes of the channels to be displayed in the ICP-MS Tuning -
Oxide Ion window.
5 When using a tuning solution different from the standard tuning solution,
change the mass value in the Mass or Ratio text box.
Enter the mass (m/z) of the element used for tuning and the mass (m+16) of its
oxide.
Since Ce has a high oxide bond strength, it will show a high oxide ion generation
rate. Therefore, the use of Ce is recommended for tuning applications in which
suppression of oxide ion generation is desired. When using Ce, set the mass values
to 140 amu and 156 amu so that the strength ratio becomes 156/140 amu.
6 Enter the data collection time (integration time) for each mass in the Integration
Time: text box.
Generally, set 0.1 seconds per one mass value.
7 Select the Plot check boxes for the channels to be displayed on the graph in the
ICP-MS Tuning - Oxide Ion window.
8 In the Displayed Tuning Parameters tree display, select the check boxes of the
tuning parameters to be displayed in the ICP-MS Tuning - Oxide Ion window.
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