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:
Dec. 27, 1994
Filed:
May. 26, 1993
Kenneth G Standing, Winnipeg, CA;
Werner Ens, Winnipeg, CA;
University of Manitoba, Winnipeg, CA;
Abstract
An improved apparatus and method for the analysis of ions generated by matrix-assisted laser desorption is disclosed. This apparatus and method enhances the mass spectral resolution compared to previous devices and methods by producing electrical modulation of the kinetic energy imparted to the generated ions in a matrix-assisted laser desorption mass spectrometer. This modulation causes parent ions of interest to be substantially reflected (and detected) or substantially not reflected (and not detected) within the spectrometer, while fragment ions produced from the parent ion of interest are substantially reflected (and detected) independent of said modulation. A difference signal is generated between electrical signals sensed when the parent ions are reflected and electrical signals sensed when the parent ions are not reflected thereby mitigating the effects on the mass spectrum of the undesired fragment ions.