Method and apparatus for concentrating vapors for analysis
US8191435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2008 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Feb 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/126
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pre-concentration device and a method are disclosed for concentrating gaseous vapors for analysis. Vapors sorbed and concentrated within the bed of the pre-concentration device are thermally desorbed, achieving at least partial separation of the vapor mixtures. The pre-concentration device is suitable, e.g., for pre-concentration 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 direct sampling and analysis systems. Features are particularly useful for continuous unattended monitoring applications. The invention finds application in conjunction with, e.g., analytical instruments where low detection limits for gaseous vapors are desirable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.