Mass spectrometer and method of mass spectrometry

Details Mass spectrometer and method of mass spectrometry Mass spectrometer and method of mass spectrometry

2007-05-08

2010-10-26

Berman, Jack I (Department: 2881)

Radiant energy

Ionic separation or analysis

C250S282000, C250S290000, C250S293000, C250S292000

Reexamination Certificate

active

07820961

ABSTRACT:
A linear trap having high ejection efficiency and low ejection energy is realized. In a mass spectrometer in which ions generated by an ion source are introduced to a quadrupole rod structure applied with RF voltage and ejected from the quadrupole rod structure so as to be detected by a detection mechanism, a mass dependent potential is formed in the axial direction of the quadrupole rod structure and ions are ejected mass selectively from the vicinity of a minimum point of the potential, the mass dependent potential being formed by applying electrostatic voltage and RF voltage to an insertion electrode inserted in the quadrupole rods.

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