Diathermy knife ionisation source
US9053914B2 · kind B2 · utility
32Cited by
19References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2218/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of detecting one or more compounds, chemicals or contaminants in a substrate by mass spectrometry is disclosed. A non-living substrate is analyzed by contacting the substrate with a diathermy knife. An electric current is applied to the diathermy knife such that the diathermy knife vaporizes a portion of the substrate. The vapor is aspirated via a sampling tube pumped by a venturi pump into a vacuum chamber of a mass spectrometer. Analyte molecules are aspirated into the vacuum chamber whereupon they impact a surface of the vacuum chamber and are ionized to form analyte ions which are then mass analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.