Atmospheric pressure ionization mass spectrometer

Details Atmospheric pressure ionization mass spectrometer Atmospheric pressure ionization mass spectrometer

1996-02-13

1997-12-02

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Methods

250281, H01J 4904

Patent

active

RE0356816

ABSTRACT:
An atmospheric pressure ionization mass spectrometer which comprises an ion source for ionizing a sample gas, a low pressure region provided with a mass filter and a collector therein, a differential pumping region provided between the ion source and the low pressure region and with electrodes provided on the side of the ion source and on the side of the low pressure region, respectively, and a pressure-gradient electrode means for dissociation and removal of cluster ions, as connected to the electrode on the side of the ion source among the electrodes provided in the differential pumping region is disclosed.

REFERENCES:
patent: 3842266 (1974-10-01), Thomas
patent: 4023398 (1977-05-01), French et al.
patent: 4121099 (1978-10-01), French et al.
patent: 4144451 (1979-03-01), Kambara
patent: 4542293 (1985-09-01), Fenn et al.
Gray and Date, "Inductively Coupled Plasma Source Mass Spectrometry Using Continuum Flow Ion Extraction", The Analyst, vol. 108, No. 1290, pp. 1033-1050, Sep. 1983.

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