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Ion mobility spectrometer using frequency-domain separation

United States Patent

*** EXPIRED ***
August 4, 1998
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
An apparatus and method is provided for separating and analyzing chemical species in an ion mobility spectrometer using a frequency-domain technique wherein the ions generated from the chemical species are selectively transported through an ion flow channel having a moving electrical potential therein. The moving electrical potential allows the ions to be selected according to ion mobility, with certain of the ions being transported to an ion detector and other of the ions being effectively discriminated against. The apparatus and method have applications for sensitive chemical detection and analysis for monitoring of exhaust gases, hazardous waste sites, industrial processes, aerospace systems, non-proliferation, and treaty verification. The apparatus can be formed as a microelectromechanical device (i.e. a micromachine).
Martin; Stephen J. (Albuquerque, NM), Butler; Michael A. (Albuquerque, NM), Frye; Gregory C. (Cedar Crest, NM), Schubert; W. Kent (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
08/ 959,659
October 28, 1997
GOVERNMENT RIGHTS This invention was made with Government support under Contract No. DEAC04-94AL85000 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.