Mass spectrometer and mass spectrometry
US11031226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2017 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Oct 25, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4215
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a mass spectrometric method including steps of transporting ions generated in an ion source 2 to a mass spectrometer section 4 through an ion optical system 3 having a plurality of ion lenses 31, 32 and 33, and detecting the ions after performing mass separation of the ions. The method further includes steps of: adjusting a voltage applied to a first ion lens 33 which is one of the ion lenses 31, 32 and 33 so that the detection sensitivity for an ion having a predetermined mass-to-charge ratio satisfies a previously specified requirement; and applying, to a second ion lens 32 which is one of the ion lenses 31, 32 and 33 except the first ion lens 33, a voltage at which a change in the ion detection sensitivity with respect to the voltage applied to the second ion lens 33 is within a previously specified range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.