Ion trapping mass spectrometry apparatus
US5783824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1997 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/423
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometry apparatus having a constitution for attaining analysis with high sensitivity and high resolving power comprising a linear radio-frequency quadrupole ion trap and means for avoiding degradation of analysis performance due to field disturbance caused by an end electrode thereof, where said purpose is achieved by means for forming a harmonic potential in the central axis thereof in whose potential ions are resonantly oscillated to be ejected outside of the ion trap for detection along the axis, or by means to eliminate undesirably- degraded signals originating near the ion trap portions that are disturbed by the end electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.