Detection of polar vapours

Details Detection of polar vapours Detection of polar vapours

G - Physics

01

N

358/21

G01N 27/62 (2006.01) G01N 27/66 (2006.01)

Patent

CA 1093714

ABSTRACT OF THE DISCLOSURE The invention provides all improved apparatus for the detection of polar vapours in a gas which avoids the need for liquid reagents and requires little maintenance. In its simplest form the apparatus comprises a body member defining a passage through which a gas stream may be caused to pass; an ionising source for ionising the gas stream; and a collector electrode positioned in the passage downstream of the ionising source for collecting ions carried by the gas stream. Improved performance can be obtained by the provision of means for selectively removing uncombined gas ions from the gas stream between the ionising source and the collector electrode whilst permitting ion clusters formed on polar molecules to remain therein.

267765

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