Method and apparatus for improved mass spectrometer operation
US10679841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2018 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Oct 24, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4215
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating a quadrupole mass filter is disclosed. A first set of RF and resolving DC voltages are applied to electrodes of a quadrupole mass filter to selectively transmit first ions having a first mass-to-charge ratio (m/z). A second set of RF and resolving DC voltages are applied to electrodes of the quadrupole mass filter to selectively transmit second ions having a second m/z. Detection of the second ions is initiated after completion of a settling time. The settling time is determined in accordance with the relationship: Eq. 1, where ts is the settling time, (m/z)1 is the first mass-to-charge ratio, (m/z)2 is the second mass-to-charge ratio and A, B and C are empirically derived coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.