Space charge adjustment of activation frequency

Details Space charge adjustment of activation frequency Space charge adjustment of activation frequency

2005-04-26

2005-04-26

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

Methods

C250S292000, C250S283000, C250S290000

Reexamination Certificate

active

06884996

ABSTRACT:
Methods, systems and apparatus, including computer program products, for operating a quadrupole ion trap in mass spectrometry. A calibrated resonant frequency is determined precursor ions in a first ion population in an ion trap. A frequency adjustment is determined for the precursor ions in a second ion population based on the number of ions in the second ion population. The ion trap is operated using an adjusted resonant frequency that is based on the calibrated resonant frequency and the determined frequency adjustment.

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