Gas separation: apparatus – Chromatography type apparatus – Plural separate and distinct stages
Patent
1993-12-28
1996-08-20
Woo, Jay H.
Gas separation: apparatus
Chromatography type apparatus
Plural separate and distinct stages
73 2341, 95 82, 95 85, 95 86, 95 87, 96105, 96106, B01D 1508
Patent
active
055474977
ABSTRACT:
A gas chromatograph system including a cold trap having two portions, a capillary tube and a porous layer open tubular (PLOT) column, for substantially simultaneously trapping lower and higher boiling point gasses. The capillary tube enables cold trapping of lower boiling point gasses while the PLOT column enables cold trapping of higher boiling point gasses. The capillary tube interconnects at one end to an analytical column and a sample gas source and interconnects at its other end to a first end of the PLOT column. The other end of the PLOT column interconnects to a carrier gas source and a vacuum source. The capillary tube and PLOT column are both positioned within a temperature controlled environment of the cold trap. During the collection mode, the temperature control device maintains a relatively low temperature to condense the sample components. During injection of the sample from the cold trap to the analytical column, the temperature control device maintains a relatively high temperature to vaporize the sample components.
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Cryofocusing Inlet with Reverse Flow Sample Collection for Gas Chromatography, Mark A. Klemp, Michael L. Akard, and Richard D. Sacks, 266b Analytical Chemistry, 65 (1993) Sep. 15, No. 18, Washington, D.C. U.S .
Klemp Mark A.
Peters Anita J.
Chromatofast, Inc.
Smith Duane S.
Woo Jay H.
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