Method and apparatus for concentrating vapors for analysis
US7430928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2006 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Dec 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/126
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method are disclosed for pre-concentrating gaseous vapors for analysis. The invention finds application in conjunction with, e.g., analytical instruments where low detection limits for gaseous vapors are desirable. Vapors sorbed and concentrated within the bed of the apparatus can be thermally desorbed achieving at least partial separation of vapor mixtures. The apparatus is suitable, e.g., for preconcentration and sample injection, and provides greater resolution of peaks for vapors within vapor mixtures, yielding detection levels that are 10-10,000 times better than for direct sampling and analysis systems. Features are particularly useful for continuous unattended monitoring applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.