FAIMS Apparatus Comprising Source of Dry Gas
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United States of America Patent
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Issued Date -
Dec 17, 2009
app pub date -
Sep 21, 2007
filing date -
Sep 22, 2006
priority date (Note) -
Abandoned
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Abstract
An ion mobility spectrometer has an inlet opening into an ionization region including a conventional ionization source. A series of several charged, circular electrode plates with aligned apertures extending therethrough provides a drift region on the opposite side of the ionization region from the inlet. A gas inlet connected to a source of clean, dry flushing gas opens between the ends of the drift region, with the gas flowing against the ion flow to one side to remove water molecules from the analyte. Gas flowing in the opposite direction is effective to help drive the dry analyte ions to an analysis region provided by two parallel asymmetric field plates.
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