Atmospheric pressure ionization mass spectrometer
USRE35681E · kind E · reissue
3Cited by
5References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 13, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Feb 13, 2016 |
Classification
- Technology area (CPC —)General
Abstract
An atmospheric pressure ionization mass spectrometer which comprises an ion source for ionizing a sample gas, a low pressure region provided with a mass filter and a collector therein, a differential pumping region provided between the ion source and the low pressure region and with electrodes provided on the side of the ion source and on the side of the low pressure region, respectively, and a pressure-gradient electrode means for dissociation and removal of cluster ions, as connected to the electrode on the side of the ion source among the electrodes provided in the differential pumping region is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.