Compliant column sheath assembly for gas chromatography
AssigneeUniversity of Dayton
InventorsWayne A. Rubey, Richard C. Striebich, Jesse A. Contreras
Life of this patent
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Abstract
A compliant column sheath assembly for use in a gas chromatograph is provided which includes an open tubular column in the form of a helical coil having a coiled lengt of between about 5 and 15 cm. The sheath assembly further includes an insulating sheath which surrounds the open tubular column and a frame. When incorporated in a gas chromatograph, the compliant column sheath assembly allows samples to be analyzed in about 2 to 10 seconds.
Claims16
A compliant column sheath assembly for use in a gas chromatograph comprising:
- an open tubular column in the form of a helical coil having front and back ends;
- said column having a length of from about 5 to 15 cm in coiled form;
- and
- a frame.
A gas chromatograph comprising:
- a sample inlet for admitting and receiving a sample to be analyzed;
- a chamber including a compliant column sheath assembly therein, said assembly including an open tubular column in the form of a helical coil having a length of from about 5 to 15 cm in coiled form;
- a frame, and an insulating sheath surrounding said open tubular column and frame;
- a heat exchange gas for regulating the heating and cooling of said open tubular column;
- a sample outlet;
- and
- a detection device.
A method of analyzing a sample in a gas chromatograph comprising:
- providing a gas chromatograph including a compliant column sheath assembly comprising an open tubular column having front and back ends, said column being in the form of a helical coil having a length of from about 5 to 15 cm in coiled form;
- a frame;
- and an insulating sheath surrounding said open tubular column and said frame;
- and a heat exchange gas for regulating the heating and cooling of said column;
- admitting a sample into said open tubular column;
- wherein said open tubular tubular column has been cooled;
- and
- rapidly heating said front end of said open tubular column such that a negative temperature gradient is produced along the length of said column;
- wherein said sample is analyzed in about 2 to 10 seconds.
Dependencies are inferred from the claim text.