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:
Apr. 27, 1993
Filed:
Dec. 18, 1991
Paul E Kelley, San Jose, CA (US);
Teledyne MEC, Mountain View, CA (US);
Abstract
A mass spectrometry method in which a trapping field signal (such as a three-dimensional quadrupole trapping field signal or other multipole trapping field signal) set to store ions of interest is superimposed with a notch-filtered broadband ('filtered noise') signal, and ions are formed or injected in the resulting combined field. The filtered noise signal resonates all ions (except selected ones of the ions) from the combined field, so that only selected ones of the ions remain trapped in the combined field. The combined filtered noise and trapping field signal (the 'combined signal') is then changed to excite the trapped ions sequentially, so that the excited ions can be detected sequentially. The invention can be applied to perform an (MS).sup.n or CI, or combined CI/(MS).sup.n, mass spectrometry operation.