Chemistry: analytical and immunological testing – Heterocyclic carbon compound – Diverse hetero atoms in same or different rings
Patent
1994-07-29
1995-12-19
Alexander, Lyle A.
Chemistry: analytical and immunological testing
Heterocyclic carbon compound
Diverse hetero atoms in same or different rings
436111, 436107, 436901, 436156, 422 61, 73 1G, F42B 1310
Patent
active
054767946
ABSTRACT:
Disclosed is a method of rapidly checking surfaces for the presence of traces of specific compounds such as certain explosives and drugs. A hand-covering such as a cotton glove is used to wipe surfaces to pick up particles of the specific compound which may indicate the presence of larger amounts or previous contact of a surface by a person who has handled the compound. The particles are transferred--unheated--to collection surfaces of a hand-held sample probe by vacuuming of the gloved hand by the battery-operated probe. Heat is then supplied by a source external to the probe to vaporize the particles, and the vapors are analyzed by a suitable technique such as high speed gas chromatography. The method permits checking of surfaces for explosives at processing rates of up to several samples per minute.
REFERENCES:
patent: 3672351 (1972-06-01), Ubersax et al.
patent: 4909090 (1990-03-01), McGown et al.
patent: 5092218 (1992-03-01), Fine et al.
patent: 5092219 (1992-03-01), Rounbehler et al.
Fine David H.
Fraim Freemand W.
O'Brien Stephen E.
Alexander Lyle A.
Thermedics Inc.
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