Thermal analyser

Details Thermal analyser Thermal analyser

1994-02-24

1995-08-22

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas chromatography

73 2341, 73 2501, 422 681, 422 78, G01N 3122, G01N 2522

Patent

active

054429498

ABSTRACT:
In a gas scavenging unit for gas chromatography analysis of gas generated in a thermal analyzer, the thermal analyser is equipped with a gas scavenging unit for scavenging gas generated in the thermal analyzer without usage of a carrier gas and no influence of a switching valve exists in the case of multi-stage sampling. For scavenging, there can be provided multiple sampling flow paths each have an aperture placed between the sample and the carrier gas outlet of the thermal analyzer, a flow regulator, a flow path switching valve, and a suction unit which is connected to the switching valve. The gas generated in the thermal analyzer is suctioned by the suction unit through a sampling flow path which is changed with the flow path switching valve. The appropriate volume of gas is scavenged to the GC analysis without any influence of the flow (rate) of the carrier gas even when the scavenging is done through switching to multiple scavengers.

REFERENCES:
patent: 3346341 (1967-10-01), Sternberg
patent: 3847546 (1974-11-01), Paul
patent: 4244917 (1981-01-01), Woods et al.
patent: 4980131 (1990-12-01), Meuzelaar et al.
patent: 5108928 (1992-04-01), Menard et al.
patent: 5191211 (1993-03-01), Gorman, Jr.

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