The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1997
Filed:
Mar. 28, 1996
Applicant:
Inventors:
Jochen Franzen, Bremen, DE;
Claus Koster, Lilienthal, DE;
Assignee:
Bruker-Franzen Analytik GmbH, Bremen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250288 ; 250282 ;
Abstract
The invention relates to a device and method for the ionization of non-vaporizable substance molecules at atmospheric pressure by chemical ionization (APCI=atmospheric pressure chemical ionization). The invention consists of desorbing the analyte substances which are mixed with decomposable substances (matrix substances) in solid form on a solid support, by laser irradiation at atmospheric pressure into a gas stream, and to add sufficient ions for proton transfer reactions to the gas stream. Explosives like cellulosis trinitrate or trinitro toluene (TNT) form a preferred class of decomposable matrix substances.