Short path thermal desorption apparatus for use in gas chromatography techniques
US5065614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Jul 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/3046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A short path thermal desorption apparatus for use in a gas chromatoagraphy-detector unit (GC-DET) such as a gas chromatography-mass spectrometry system has a housing defining an upper compartment, and a desorption compartment. An upper front panel on the housing has an elongated longitudinally disposed opening which provides communication between the upper compartment and the exterior of the housing. An injection assembly is disposed at the exterior of the housing adjacent the upper front panel and is actuated from a disengaged position to an engaged position with the gas chromatography unit by a suitable gas powered cylinder mounted in the upper compartment. The injection assembly includes, a desorption tube for collecting and storing the sample compound to be analyzed and includes, means for passing a carrier gas therethrough to desorb the sample component when the desorption unit is heated, and a needle injector for passing the desorbed sample component to the GC-DET system for identification and quantification of the sample component. The desorption tube is operatively associated with a desorption block assembly having a pair of coacting heating blocks made of materials having …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.