Apparatus and a method for detecting and measuring trace...

Details Apparatus and a method for detecting and measuring trace... Apparatus and a method for detecting and measuring trace...

G - Physics

01

N

358/21

G01N 27/62 (2006.01) G01N 27/64 (2006.01)

Patent

CA 1110370

ABSTRACT OF THE DISCLOSURE Method and apparatus for detecting the presence of very small concentrations of certain vapors and gases in air or other gaseous backgrounds. A gas sample ionized by a source of ionizing radiation. The sample of ionized gas is then directed through a recombination region where ions are selectively recombined. The ionized gas is further directed through a drift region where the ions are subjected to a drift potential and separated into different groups, depending upon their mobilities. In an alternate embodiment, the ionized gas is first directed through a drift region, followed by a recombination region.

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