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US 5,808,178 AGranted
High speed gas chromatography
AssigneeThermedics Detection Inc.
InventorsDavid P. Rounbehler, Eugene K. Achter, David H. Fine, George B. Jarvis, Stephen J. MacDonald, David B. Wheeler, Clayton D. Wood
Life of this patent
Estimating the term…
Abstract
A high speed gas chromatography system includes a heated isothermal region and a gas chromatography column located externally to the isothermal region. The system also includes a detector and a flow path between the column and the detector. At least a portion of the flow path is positioned in the isothermal region.
Claims112
A flash chromatography module, including:
- a coiled sheath;
- a gas chromatography column positioned within and separate from the sheath, wherein a layer of gas chromatography material is located on an inner surface of the column, and an outer diameter of the column is smaller than an inner diameter of the sheath;
- and
- connectors positioned at ends of the sheath;
- wherein cross sections of the connectors are substantially larger than cross sections of the sheath so that the connectors provide rigid structures for mechanically connecting the flash chromatography module to a gas chromatography system.
2 more elements
A high speed gas chromatography system, comprising:
- a gas chromatography module, including:
- a coiled sheath;
- a gas chromatography column positioned within and separate from the sheath, wherein a layer of gas chromatography material is located on an inner surface of the column, and an outer diameter of the column is smaller than an inner diameter of the sheath;
- and
- connectors positioned at ends of the sheath;
- wherein cross sections of the connectors are substantially larger than cross sections of the sheath so that the connectors provide rigid structures for mechanically connecting the chromatography module to a gas chromatography system;
- a heated, controlled-temperature region,
- an enclosure external to the controlled-temperature region and containing the chromatography module, and
- an insulating wall between the controlled-temperature region and the enclosure, the insulating wall providing an abrupt temperature transition between the enclosure and the controlled-temperature region.
6 more elements
Dependencies are inferred from the claim text.