Quadrupole mass filter with unbalanced R.F. voltage

Details Quadrupole mass filter with unbalanced R.F. voltage Quadrupole mass filter with unbalanced R.F. voltage

1987-11-04

1989-03-28

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Methods

250292, B01D 5944

Patent

active

048166758

ABSTRACT:
An unbalanced radio frequency voltage is supplied between two pairs of conductive rods of a quadrupole mass filter of a mass spectrometer system. Means are provided for d.c. voltage polarity reversal for monitoring positive and negative ions. The d.c. voltage is derived by rectification of the radio frequency voltage.

REFERENCES:
patent: 3147445 (1964-09-01), Wuerker et al.
patent: 3321623 (1967-05-01), Brubaker
patent: 3621464 (1971-11-01), Bryndza
patent: 4214158 (1980-07-01), Schmidt

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