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:
Jan. 28, 2003
Filed:
Jun. 02, 2000
Alexandre V. Loboda, Winnipeg, CA;
Andrei Krouttchinskikh, New York, NY (US);
Victor Spicer, Winnipeg, CA;
Werner Ens, Winnipeg, CA;
Kenneth Standing, Winnipeg, CA;
University of Manitoba, Manitoba, CA;
Abstract
A method and apparatus are provided for selective collision-induced dissociation of a substance, by resonance excitation of ions. An ion stream is supplied into a quadrupole ion guide operated at elevated pressure with a buffer gas. In addition to a radio frequency field for guiding ions through the ion guide, an extra field or other excitation is provided. This field is selected to cause resonance excitation of parent ions of interest. These ions gain kinetic energy and undergo enhanced collision-induced dissociation with a buffer gas. This generates fragment ions, so that the resultant ion stream, containing remaining parent ions and fragment ions can be analyzed in a suitable analyzer. The method essentially enables the two steps of selection of a particular parent ion and generation of fragment ions by collision-induced dissociation to be carried out in a single step, giving a simpler apparatus and enhanced efficiency.