Thermal desorption device for a gas chromatograph
US5588988A · kind A · utility
Inventors
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/128
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a thermal desorption device for a gas chromatograph, having a thermostatically controlled oven (1) provided with a carrier gas connection and having an evaporator tube. In this case, the evaporator tube is an interchangeable sample holder tube (5) which can be held by a holding chamber (2) in the oven (1), which sample holder tube can be fitted into a holder piece (6) with one end externally sealed by a seal (8), the holder piece (6) having two seals (9) arranged separated in the region of its casing and being capable of being fitted into a correspondingly designed holder (10), the carrier gas connection (14) opening in the region (12) of an annular gap (13) between the holder (10) and the holder piece (6) between the two seals (9) located on the casing, which annular gap (13) is, for its part, connected to an annular gap (15) surrounding the inserted end of the sample holder tube (5), a trap (18) being connected downstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.