Method and apparatus for improving the specificity of an ion mobility spectrometer utillizing sulfur dioxide dopant chemistry
US5095206A · kind A · utility
26Cited by
5References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1991 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Apr 17, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J47/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved ion mobility spectrometer (IMS) and method for operating the same which enables analysis of a specific acid gas analyte in a mixture of such gases when air is used as the carrier gas and the drift gas in the IMS. A controlled concentration of sulfur dioxide dopant is added to the air carrier gas stream prior to application of the carrier gas stream. In the IMS, the drift times of the ions generated from the doped air carrier gas differ from the drift times of the ions generated from the acid gas analyte, thereby enabling identification and quantification of the analyte.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.