Detectors And Ion Sources

A field asymmetric ion mobility spectrometer (FAIMS) has an analyte ion source assembly by which an analyte substance is ionized and supplied to the inlet of the spectrometer. The ion source assembly has an upstream source of clean, dry air and two ion sources of opposite polarity arranged at the sa...

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Bibliographic Details
Main Authors TAYLOR STEPHEN JOHN, CLARK ALASTAIR, TURNER ROBERT BRIAN, TURNER RICHARD, MUNRO WILLIAM ANGUS
Format Patent
LanguageEnglish
Published 04.11.2010
Subjects
BASIC ELECTRIC ELEMENTS
CORONA DEVICES
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
OVERVOLTAGE ARRESTERS USING SPARK GAPS
SPARK GAPS
SPARKING PLUGS
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Summary:A field asymmetric ion mobility spectrometer (FAIMS) has an analyte ion source assembly by which an analyte substance is ionized and supplied to the inlet of the spectrometer. The ion source assembly has an upstream source of clean, dry air and two ion sources of opposite polarity arranged at the same distance along the flow path. The ion sources are arranged so that the overall charge of the plasma produced is substantially neutral. The analyte substance is admitted via an inlet downstream of the ion sources and flows into a reaction region of enlarged cross section to slow the flow and increase the time for which the analyte molecules are exposed to the plasma.
Bibliography:Application Number: US20080595014