Positive and negative ion recording system for mass spectrometer

Details Positive and negative ion recording system for mass spectrometer Positive and negative ion recording system for mass spectrometer

1976-01-20

1978-01-03

Smith, Alfred E.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250285, 250282, H01J 3934

Patent

active

040668940

ABSTRACT:
A method and an apparatus are disclosed for adapting a conventional quadrupole mass spectrometer to substantially simultaneously produce and record both positive and negative ions. The apparatus includes a control circuit for rapidly switching the repeller, source and lens electrodes of a quadrupole mass spectrometer between positive and negative potentials. This switching of the potentials, along with the selection of appropriately favorable ionization conditions, permits the generation of suitable streams of positive and negative ions. A dual electron multiplier detector is used for separately sensing the positive and negative ions transmitted through the quadrupole mass spectrometer. The disclosed method and apparatus are particularly suitable for obtaining accurate mass measurements using a quadrupole mass spectrometer.

REFERENCES:
patent: 2816243 (1957-12-01), Herb et al.
patent: 2939952 (1960-06-01), Paul et al.
patent: 3193722 (1965-07-01), Opitz
patent: 3280326 (1966-10-01), Gunther
patent: 3555272 (1971-01-01), Munson et al.
patent: 3629573 (1971-12-01), Carrico et al.
patent: 3641340 (1972-02-01), Grinten et al.
patent: 3767914 (1973-10-01), Mueller et al.
patent: 3849656 (1974-11-01), Wallington
patent: 3925662 (1975-12-01), Dawson

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