Skip to Content
Find More Like This
Return to Search

Apparatus for thermally evolving chemical analytes from a removable substrate

United States Patent

June 3, 2003
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Method and apparatus suited to convenient field use for heating a porous metallic substrate swiped on the surface of an article possibly bearing residue of contraband or other target chemical substances. The preferred embodiment of the device includes means for holding the swiped substrate between electrodes bearing opposite electrical charges, thereby completing an electrical circuit in which current can flow through the porous metallic substrate. Resistance causes the substrate to heat, thus driving adherent target chemicals, if present, into a space from which they are carried via gas flow into a detector such as a portable IMS for analysis.
Linker; Kevin L. (Albuquerque, NM), Hannum; David W. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
09/ 410,976
October 4, 1999
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.