Supercritical fluid extractor and ion mobility

Details Supercritical fluid extractor and ion mobility Supercritical fluid extractor and ion mobility

G - Physics

01

N

G01N 30/96 (2006.01) G01N 25/14 (2006.01) G01N 27/64 (2006.01)

Patent

CA 2079387

ABSTRACT A chemical analysis system is comprised of an ion mobility detector cell having an ionization region adjoining a drift region and a detection region adjoining the drift region, a repeller plate in the ionization region, an electrometer plate in the collector region, and further comprising a needle-shaped restrictor axially disposed in the ionization region insulated from the cell, apparatus for feeding a supercritical fluid carrying chemicals to be detected into the ionization region cell as the restrictor, apparatus for charging the restrictor to a predetermined potential relative to the repeller plate, and apparatus for maintaining a high potential difference between the repeller plate and electrometer plate whereby chemical ions are collected by the electrometer plate for detection.

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