Physical isolation of adducts and other complicating factors in precursor ion selection for IDA
US11069517B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2018 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Mar 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system is disclosed for identifying precursor ions originating from an ion source device. A mass filter filters an ion beam by using a series of overlapping precursor ion mass selection windows across the precursor ion mass range. A mass analyzer analyzes the precursor ions of each precursor ion mass selection window of the series, producing a plurality of precursor ion spectra for the precursor ion mass range. A precursor ion is selected from the spectra. The intensities for the selected precursor ion are retrieved from the spectra and a trace is produced that describes how the intensity of the selected precursor ion varies with the location of the precursor ion mass selection window. The selected precursor ion is identified as a precursor ion originating from the ion source device if the trace includes a nonzero intensity for the m/z value of the selected precursor ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.