Ion trapping mass spectrometry method and apparatus therefor
US5679950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1996 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Apr 2, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ion trapping mass spectrometer permitting highly sensitive mass spectrometry through in-situ observation. The mass spectrometer comprises ion trapping electrodes, a laser device for generating a cooling laser beam and a photo detector. The ion trapping electrodes generate a field in which to store sample ions and laser-cooled probe ions concurrently. The ions are cooled by laser as well as by the effect of sympathetic cooperative cooling, whereby intense resonance scattering light is acquired from the probe ions. An analyzing AC electric field is applied to the sample ions while the field is being scanned in frequency. Resulting changes in the resonance scattering light and spatial distribution of the probe ions are observed for mass spectrometry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.