Miniature quadrupole mass spectrometer array

Details Miniature quadrupole mass spectrometer array Miniature quadrupole mass spectrometer array

Filed on

1996-10-23

Date issued

1998-02-17

Examiner

Berman, Jack I.

Patent Class

Radiant energy

SubClass

Ionic separation or analysis

SubSubClass

Cyclically varying ion selecting field means

Other Related Categories

250281, H01J 4942

Type

Patent

Status

active

Patent number

057193932

Description

ABSTRACT:
The present invention provides a minature quadrupole mass spectrometer array for the separation of ions, comprising a first pair of parallel, planar, nonmagnetic conducting rods each having an axis of symmetry, a second pair of planar, nonmagnetic conducting rods each having an axis of symmetry parallel to said first pair of rods and disposed such that a line perpendicular to each of said first axes of symmetry and a line perpendicular to each of said second axes of symmetry bisect each other and form a generally 90 degree angle. A nonconductive top positioning plate is positioned generally perpendicular to the first and second pairs of rods and has an aperture for ion entrance along an axis equidistant from each axis of symmetry of each of the parallel rods, a nonconductive bottom positioning plate is generally parallel to the top positioning plate and has an aperture for ion exit centered on an axis equidistant from each axis of symmetry of each of the parallel rods, means for maintaining a direct current voltage between the first and second pairs of rods, and means for applying a radio frequency voltage to the first and second pairs of rods.

REFERENCES:
patent: 5596193 (1997-01-01), Chutjian et al.

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