Ionization device

Details Ionization device Ionization device

1998-06-24

1999-05-25

Brock, Michael

Radiant energy

Ionic separation or analysis

With sample supply means

31511181, B01D 5944

Patent

active

059071540

ABSTRACT:
An ionization device has an ionization chamber in which sample molecules are ionized, an electrode such as a repeller electrode affixed to the ionization chamber through an insulating holder member having a surface exposed to the interior of the ionization chamber, and a detector for detecting the changes in the resistance of this insulating holder member. As contaminants are deposited on the inner walls of the ionization chamber, they are also deposited on the exposed surface of the insulating holder member, affecting the resistance value of the insulating holder member. The level of contamination inside the ionization chamber can be estimated by monitoring the output of the detector.

REFERENCES:
patent: 4093913 (1978-06-01), O'Neal, III
patent: 4849628 (1989-07-01), McLuckey et al.
patent: 5296713 (1994-03-01), Tanaka

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