Method and apparatus for ionizing a sample under atmospheric pre

Details Method and apparatus for ionizing a sample under atmospheric pre Method and apparatus for ionizing a sample under atmospheric pre

1997-08-29

1999-12-21

Berman, Jack I.

Radiant energy

Ionic separation or analysis

250288, H01J 4906

Patent

active

060052457

ABSTRACT:
A method in which cutting of small droplets, neutral particles or photons through to a slit provided between a differential pumping portion and a mass analysis portion is combined with slight deflection of ions just before introduction of the ions into the mass analysis portion so that noises are greatly reduced without reduction of signals to thereby improve the signal-to-noise ratio which is an index of detecting sensitivity or lower limit.

REFERENCES:
patent: 4746794 (1988-05-01), French et al.
patent: 4999492 (1991-03-01), Nakagawa
patent: 5376791 (1994-12-01), Swanson et al.
patent: 5426301 (1995-06-01), Turner
patent: 5481107 (1996-01-01), Takada et al.

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