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Human portable preconcentrator system

United States Patent

August 12, 2003
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A preconcentrator system and apparatus suited to human portable use wherein sample potentially containing a target chemical substance is drawn into a chamber and through a pervious screen. The screen is adapted to capture target chemicals and then, upon heating, to release those chemicals into the chamber. Chemicals captured and then released in this fashion are then carried to a portable chemical detection device such as a portable ion mobility spectrometer. In the preferred embodiment, the means for drawing sample into the chamber comprises a reversible fan which, when operated in reverse direction, creates a backpressure that facilitates evolution of captured target chemicals into the chamber when the screen is heated. The screen can be positioned directly in front of the detector prior to heating to improve detection capability.
Linker; Kevin L. (Albuquerque, NM), Brusseau; Charles A. (Tijeras, NM), Hannum; David W. (Albuquerque, NM), Puissant; James G. (Albuquerque, NM), Varley; Nathan R. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
09/ 917,017
July 26, 2001
This invention was made with Government support under Contract DE-AC04-94AL85000 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.