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Agilent 7500 ICP-MS ChemStation Operator’s Manual
Tuning
mass toward higher mass.
• Axis Offset
Adjusts mass calibration. The higher the value, shifts the peak position of all
masses toward higher mass.
• QP Bias
Controls the speed of ions as they pass through the Q-pole. A typical value is 0 V
without the ShieldTorch system. It may be used up to 6 V when the peak shape
and resolution are not good. This voltage should be the same as the Plate Bias to
avoid higher background. A typical value with the ShieldTorch installed will be
-10 to 0 V.
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