Method and apparatus for analysis and ion source
US8835838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion source is formed by a chamber 2. A capillary tube 6 forms an inlet to the chamber. A heater 7 is associated with the capillary tube to heat air drawn into the chamber. An electrode 4 is provided in the chamber and maintained at a voltage in the range 100 to 500 volts. In use the source is connected to an analyzer such as a mass spectrometer 10. The capillary tube is open to the atmosphere. Pressure in the chamber is reduced, and pressure in the analyzer is further reduced. An electrical potential is applied to the electrode to create a discharge within the chamber. Ionization of air molecules within the chamber leads to ionization of any sample molecules present in the chamber. Ions are swept into the analyzer for analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.