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. 10, 2013
Filed:
Feb. 04, 2010
Dual ion trapping for ion/ion reactions in a linear rf multipole trap with an additional dc gradient
Applicants:
Dirk Nolting, Bremen, DE;
Jens Griep-raming, Ganderkesee, DE;
Inventors:
Dirk Nolting, Bremen, DE;
Jens Griep-Raming, Ganderkesee, DE;
Assignee:
Thermo Fisher Scientific (Bremen) GmbH, Bremen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 49/42 (2006.01); H01J 49/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A novel method and mass spectrometer apparatus is introduced to enable the simultaneous isolation of cations and anions (i.e., precursor and reagent ions) in a linear multipole ion trap via the application of an additional axial DC gradient in combination with coupled RF potential(s). Thus, the combination of the RF and DC voltages in such an arrangement forms a pseudopotential designed to provide for minima for the trapped positively and negatively charged particles that result in the overlap of the ion clouds so as to provide for beneficial ion/ion reactions.