Title:
METHOD FOR CLEANING THE FLASH CHAMBER OF A GAS CHROMATOGRAPHIC DEVICE AND INJECTOR FOR THE IMPLEMENTATION OF SAID METHOD
Document Type and Number:
WIPO Patent Application WO2000062053
Kind Code:
A8
Abstract:
The invention relates to an improvement in gas chromatographic analysis, consisting in burning off the non-volatile products remaining in the injector after an analysis. The invention also relates to an advanced injection device comprising a combustion-flash chamber (7), wherein the sample that is to be analyzed is introduced with the aid of a syringe, and a lateral tube (8) that enables a combustion gas containing oxygen to be introduced through a pressure drop (35). The flash-combustion chamber is connected to the chromatography column (18). When the volatile constituents have been vaporized and analyzed on the chromatography column (18), the combustion gas is introduced in the tube (7) by opening a valve (32) when the valve (31) enabling the vector gas to arrive inside the injector is closed and a valve (5) is open. The injector becomes de-pressurized and the combustion gas flows through the injector, is brought to a sufficient temperature to enable combustion of the non-volatile residues and is then discharged, together with the combustion gas, via the valve (5).
Inventors:
WITIER PIERRE (FR)
Application Number:
PCT/FR2000/000936
Publication Date:
March 29, 2001
Filing Date:
April 12, 2000
Export Citation:
Assignee:
WITIER PIERRE (FR)
International Classes:
G01N30/12; G01N30/40; (IPC1-7): G01N30/12
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