A column oven includes a substantially sealed space surrounded by wall surfaces made of a heat conductive material to accommodate an analytical column, a heater for heating the wall surfaces made of the heat conductive material, and a heat insulating material surrounding an outside of the wall surfaces made of the heat conductive material. That is, a space inside the column oven in which the analytical column is accommodated is formed as a substantially sealed structure surrounded by the heat conductive wall surfaces, and the wall surfaces surrounding the substantially sealed space are heated by the heater, thereby heating the substantially sealed space uniformly from circumferential directions.

A gas chromatography guard column assembly is disclosed including a guard column having an inlet and an outlet. The guard column is disposed in a coil having a column coil aspect ratio of less than 15. A gas chromatography system is disclosed including an oven cavity, a heater assembly, an inlet, a guard column, an analytical column, and a detector. The guard column is in fluid communication with the inlet and is disposed in a guard column coil. The analytical column is in fluid communication with the guard column and is disposed in an analytical column coil. The detector is in fluid communication with the analytical column. The analytical column coil has an analytical column coil central axis aligned with a central axis of the heater assembly, and the guard column coil has a guard column coil central axis remote from the central axis of the heater assembly.

A temperature control chamber includes a heat impact unit configured for heat impacting a sensor unit in accordance with a heat profile, the sensor unit configured for sensing heat impact response data over time in response to being heat impacted with the heat profile, and a determining unit configured for determining information indicative of a heat transfer characteristic in the temperature control chamber based on the sensed heat impact response data.

Provided is a gas chromatograph capable of efficiency circulating air in a column oven. The gas chromatograph is provided with a column oven, a heater, a fan, and a cylindrical member. The column oven accommodates a column. The heater heats the inside of the column oven. The fan has a blade that rotates about a rotation axis in the column oven, and sends air toward the column provided in the axial direction that is a direction along the rotation axis. The cylindrical member is arranged to accommodate at least a part of the fan in a state of being spaced apart from the column in the axial direction and surrounding an outer periphery of the fan along a rotational direction of the blade.

The invention relates to a system and micro monitor apparatus, a space-, time-, and cost-efficient device to concentrate, identify, and quantify organic compounds in gas environments. The invention further relates to a method centered on gas chromatography for identifying and quantifying organic compounds in gas environments, using air as the carrier gas, without the need for a compressed pre-bottled purified carrier gas.

A first attachment portion to which a packed column is attachable and a second attachment portion to which a chip column is attachable are housed in a column oven. Designation of a temperature of the column oven is received by a designated temperature receiver. In a case in which the chip column is not attached to the second attachment portion, an upper limit temperature of the column oven is set to a first temperature by a setter. An upper limit temperature of the column oven is set to a second temperature lower than the first temperature in a case in which the chip column is attached to the second attachment portion. A temperature of the column oven is adjusted to a received temperature by a temperature adjuster in a case in which the received temperature is equal to or lower than an upper limit temperature.

A first mixer mixes solvents therein. A second mixer has a capacity different from that of the first mixer, and mixes solvents therein. A first separation column is associated with the first mixer. A second separation column is associated with the second mixer. A first valve enables switchover between a first communication state in which the first mixer and the first separation column communicate with a detector, and a second communication state in which the second mixer and the second separation column communicate with the detector. Only by switching the first valve, it is possible to switch between the first communication state and the second communication state. The internal capacity of a flow channel in the first communication state differs from that in the second communication state. Therefore, it is easy to perform analysis with different internal capacities.

The invention relates to a system and micro monitor apparatus, a space-, time-, and cost-efficient device to concentrate, identify, and quantify organic compounds in gas environments. The invention further relates to a method centered on gas chromatography for identifying and quantifying organic compounds in gas environments, using air as the carrier gas, without the need for a compressed pre-bottled purified carrier gas.

For providing a column oven and chromatography capable of reliably preventing misconnection of a storage unit to a connecting part, the column oven includes: a hollow casing; a column unit including an analysis column, which is arranged in the casing and allows a mobile phase (Q) to flow through, and a storage unit, which is attached to the analysis column and stores data of the analysis column; multiple holding parts, which are arranged in the casing and hold the analysis column; a tabular fixing plate, which is arranged in the casing and fixes the respective holding parts to the casing; multiple connecting parts, which are arranged in the casing and connect the storage unit electrically and detachably; and a heating part, which heats the analysis column held by the holding parts in the casing. When viewing the analysis column from a side facing the fixing plate with the analysis column held by the holding parts, the connecting parts connected to the storage unit of the column unit including the analysis column are arranged adjacent to the analysis column.

A chromatography analysis system includes a liquid delivery pump (2), an autosampler (4), a separation column (12), a column oven (6), a detector (8). The chromatography analysis system further comprising a shutdown execution part (22) configured to start shutdown to finally stop driving of the liquid delivery pump (2) and temperature control operation of the column oven (6) at a time when a predetermined situation occurs, by controlling operation of the liquid delivery pump (2) and the column oven (6), and a column protection temperature setter (24) configured to set a column protection temperature for preventing deterioration of the separation column (12) due to overheating. The shutdown execution part (22) is configured to stop driving of the heater (14) in a state where the liquid delivery pump (2) is driven when the shutdown is started, and then, stop driving of the liquid delivery pump (2) after a temperature of the internal space detected by the temperature sensor (18) becomes equal to or less than the column protection temperature.