Ion source and sample introduction method and apparatus using tw

Details Ion source and sample introduction method and apparatus using tw Ion source and sample introduction method and apparatus using tw

1992-03-24

1993-06-08

Berman, Jack I.

Radiant energy

Ionic separation or analysis

With sample supply means

250287, 250282, H01J 4926

Patent

active

052182037

ABSTRACT:
A high pressure interface device for introducing sample ions to a drift tube, an ion detection means or a mass mobility measurement means, having an ion source ionization region containing an isolated ionization source, a sample introduction port, and a reaction region in which specific sample ion species are formed by reaction of sample molecules with selected ion source ions formed by radioactive bombardment of a sample gas by the ion source ions results in an ionized gaseous sample. When coupled to a ion or mass detection or measurement means, this invention makes possible detection sensitivities of trace sample species in the subparts-per-trillion range, and under proper condition does not need calibration.

REFERENCES:
patent: 3621239 (1971-11-01), Cohen
patent: 3626178 (1971-12-01), Cohen
patent: 3626180 (1971-12-01), Carroll
patent: 3668383 (1972-06-01), Carroll
patent: 4378499 (1983-03-01), Spangler et al.
patent: 4797554 (1989-01-01), Blanchard et al.
Hill, H. H., et al., Ion Mobility Spectrometry, 62 Anal. Chem. No. 23, 1201-(Dec. 1, 1990).

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