Chromatographic interface for thermal desorption systems

Details Chromatographic interface for thermal desorption systems Chromatographic interface for thermal desorption systems

2007-10-23

2007-10-23

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Gas analysis

Gas chromatography

C073S023350, C096S101000, C096S105000, C096S106000, C095S082000

Reexamination Certificate

active

11169935

ABSTRACT:
Disclosed are systems and methods that include a thermal desorption unit, a chromatographic column, and an interface device between the unit and the column. The interface device controls the fluid flowing into the column, such as by providing additional carrier gas to maintain a substantially constant gas flow or velocity, by proving a controlled temperature increase, or by venting a portion of the gas received from the thermal desorption unit, thereby removing the dependence on the thermal desorption unit for such control. In some embodiments, the interface is a chromatographic injector. In certain embodiments, a transfer line from the desorption unit is coupled to the same port of the interface device as the chromatographic column. In some of these embodiments, this is accomplished by employing a special adaptor.

REFERENCES:
patent: 6402947 (2002-06-01), Altamirano et al.
patent: 6652625 (2003-11-01), Tipler et al.
patent: 2002/0157453 (2002-10-01), Van der Maas
patent: 43 16 375 (1994-06-01), None
patent: WO 2005/040786 (2005-05-01), None
International Search Report, PCT, Oct. 15, 2005, 7 pages.

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