Mass spectrometer, mass spectrometry, and monitoring system
US6838664B2 · kind B2 · utility
2Cited by
8References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 2, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Sep 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/724
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ion source using a corona discharge for ionizing a sample at high efficient is provided. In the corona discharge generated at a tip end of a needle electrode by application of high voltage thereto, the direction in which the sample is introduced to the region of corona discharge and the direction in which ions are drawn out of the corona discharge region are substantially opposed to each other to improve the efficiency of ionization and to maintain a stable discharge for a long period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.