Radiant energy – Ionic separation or analysis – With sample supply means
Patent
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
Brock Michael
Shimadzu Corporation
Tran Thuy Vinh
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