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:
Jul. 30, 2024
Filed:
Apr. 22, 2020
Thermo Finnigan Llc, San Jose, CA (US);
Thermo Fisher Scientific (Bremen) Gmbh, Bremen, DE;
Michael W. Senko, Sunnyvale, CA (US);
Ping F. Yip, Salem, MA (US);
Dmitry E. Grinfeld, Bremen, DE;
Steven C. Beu, Austin, TX (US);
Thermo Finnigan LLC, San Jose, CA (US);
Thermo Fisher Scientific (Bremen) GmbH, Bremen, DE;
Abstract
Apparatus and methods for performing charge detection mass spectrometry for measurement of the mass of a single ion of interest are disclosed. The ion of interest is caused to undergo harmonic oscillatory movement in the trapping field of an electrostatic trap, such that an image current detector generates a time-varying signal representative of the ion's oscillatory movement. This time-varying signal (transient) is processed (e.g., via a Fourier transform) to derive the ion's frequency and consequently determine the ion's mass-to-charge ratio (m/z). Ion charge is determined by construction of a Selective Temporal Overview of Resonant Ion (STORI) plot, which tracks the temporal evolution of signals attributable to the ion of interest, and where the slope of the STORI plot is related to the charge. The STORI plot may also be employed to identify ion decay events during transient acquisition and/or the presence of multiple ions of the same mass or non-resolvable ions.