Measuring and testing – Gas analysis – Gas chromatography
Patent
1997-12-18
2000-05-02
Williams, Hezron
Measuring and testing
Gas analysis
Gas chromatography
7386312, 96105, 422 78, G01N 3004, G01N 116, G01N 3112, B01D 5302
Patent
active
060558458
ABSTRACT:
The invention relates to a method for applying samples to be analyzed by gas chromatography using a sampling tube, which has a section which contains the adsorbing agent and narrows essentially conically towards a bore which is free of adsorbing agent and has a reduced diameter, in such a manner that the flow rate of a gas which is guided through towards the narrowed section on the outlet side is at least approximately equal to the inlet-side flow rate, liquid or gaseous starting sample material being guided through the sampling tube towards the narrowed section, so that substances to be analyzed are adsorbed on the adsorbing agent, the sampling tube being flushed with drying gas, which is guided through the sampling tube in the same direction as the starting sample material, until the liquid phase, which is contained in the sampling tube, or the starting sample material is essentially removed, and the adsorbed sample being desorbed by means of a carrier gas which is introduced through the sampling tube from the narrowed side.
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patent: 4344917 (1982-08-01), Schorno
patent: 4849179 (1989-07-01), Reinhardt et al.
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patent: 5434665 (1995-07-01), Tobe et al.
patent: 5588988 (1996-12-01), Gerstel
patent: 5672810 (1997-09-01), Shibamoto
Bremer Ralf
Gerstel Eberhard
Christensen Douglas J.
Gerstel GmbH
Politzer Jay L.
Williams Hezron
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