Agilent Technologies 7500 ICP-MS Operator's Manual page 210

5 Edit the equation in the table.
N O T E
6 Click OK when you are finished editing for that mass.
7 Click OK after you are finished editing the interference equations.
Agilent 7500 ICP-MS ChemStation Operator's Manual
Creating a Method
For example, if the interference equation for As is:
75 75 77
M x 1 + M x (-3.1278) +
As =
75
(where M represents 75 AMU), it would be edited.
This equation is taken from EPA Method 6020 (CLP-M Ver.9).
The edited interference correction equation is a user-defined interference correction
equation to be used only with the currently created method. The default library file
will not be updated. To save a user-defined interference correction equation, click on
Save and enter the name. The equation is saved as a library file. The library file is
added to the drop-down list and can be used for other methods.
ChemStation will return to the Interference Equation dialog box, where you can
select the next mass for which you want to edit the interference equation.
The Acquisition Mode dialog box appears. To continue creating the method, see
"Setting the Acquisition Mode" in the next section.
5-18
78
M x 1.0177