Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Patent
1979-03-08
1981-06-02
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
250282, 250283, B01D 5944, H01J 4900
Patent
active
042713579
ABSTRACT:
An apparatus is provided for detecting trace quantities of chemical species in the form of a vapor by subjecting ions produced in a sample of the mixed gas under flow to an ion repulsive electric field which is directed in the opposite direction to the flow of the gases, and comprises a fan for drawing the sample through a hollow body, having an inlet, a first region containing means for ionizing at least a proportion of the molecules of the sample by a corona discharge, a second region in which the sample is subjected to an oppositely directed ion repulsive electric field and a third region having an electrode for collecting ions of selected polarity. Ions of a selected polarity whose ionic mobilities exceed a value dependent on the strength of the ion repulsive electric field and the velocity of the gas flow are prevented from entering the third region. A resistor may be provided to limit the current of the corona electric discharge to a value not greater than 100 nanoamps.
REFERENCES:
patent: 3522425 (1970-08-01), Rich
patent: 3668385 (1972-06-01), Cohen
Bradshaw Robert F. D.
Kraicer Alec
Anderson Bruce C.
Briody Thomas A.
Mayer Robert T.
Miller Paul R.
PYE (Electronic Products) Limited
LandOfFree
Trace vapor detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Trace vapor detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trace vapor detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1866824