Mass spectrometer
US7041972B2 · kind B2 · utility
35Cited by
2References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2004 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Oct 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/168
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An Atmospheric Pressure Chemical Ionisation ion source is disclosed wherein the current applied to a corona needle 2 is repeatedly varied between two or more settings during a single experimental run or acquisition. Two or more separate sets of mass spectral or mass analysed data are obtained. The ion source in one embodiment comprises a heated tube 1 arranged to discharge gas and analyte into a housing 7 enclosing corona needle 2. The housing 7 comprises a gas outlet port 3 via which analyte ions exit. According to another embodiment the corona needle does not have to be enclosed within a housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.