Measuring and testing – Gas analysis – Gas chromatography
Patent
1988-11-03
1989-09-12
Williams, Hezron E.
Measuring and testing
Gas analysis
Gas chromatography
422 89, G01N 3108
Patent
active
048648434
ABSTRACT:
A liquid sample to be analyzed is subjected to a vaporizing step. The vaporized components are submitted to a first separation stage by introducing said components into a packed chromatography column and flowing carrier gas through said column. The effluent of the first stage is passed through a flow dividing chamber. A second separation stage is performed by passing the effluent of the flow dividing chamber to a capillary chromatography column and flowing carrier gas therethrough. After a predetermined period of time, flushing gas is introduced through the flow dividing chamber and flowed through the first-stage packed column in a direction opposite to the original direction of flow while the direction of flow remains unchanged in the capillary column.
REFERENCES:
patent: 3030798 (1962-04-01), Lichtenfels
patent: 3169389 (1965-02-01), Green, Jr. et al.
patent: 3444722 (1969-05-01), Roof
patent: 3607075 (1971-09-01), Wolf
patent: 4035168 (1977-07-01), Jennings
patent: 4287752 (1981-09-01), Ury
McCoy et al; On-Line Stream Analysis with a Chromatograph; Control Engineering, vol. 17, No. 7 (Jul. 1970).
Guieze Paul B.
Varotsis Nikos
Bouchard John H.
Garrana Henry N.
Schlumberger Technology Corporation
Williams Hezron E.
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