A heat insulating member 13 is provided on the outer circumference of a connection pipe 11. The heat insulating member 13 includes: a tube 12; and an air layer 15 between the connection pipe 11 and the tube 12. Accordingly, it is possible to always keep the temperature of a sample component at the time of detection by a detector constant and thus prevent an influence of the temperature on an output result of the detector, in a low flow rate analysis using a modularized column unit and a modularized detection unit.

A heat insulating member 13 is provided on the outer circumference of a connection pipe 11. The heat insulating member 13 includes: a tube 12; and an air layer 15 between the connection pipe 11 and the tube 12. Accordingly, it is possible to always keep the temperature of a sample component at the time of detection by a detector constant and thus prevent an influence of the temperature on an output result of the detector, in a low flow rate analysis using a modularized column unit and a modularized detection unit.

A heat insulating member 13 is provided on the outer circumference of a connection pipe 11. The heat insulating member 13 includes: a tube 12; and an air layer 15 between the connection pipe 11 and the tube 12. Accordingly, it is possible to always keep the temperature of a sample component at the time of detection by a detector constant and thus prevent an influence of the temperature on an output result of the detector, in a low flow rate analysis using a modularized column unit and a modularized detection unit.

A gas chromatograph device is provided with a column oven, an opening-and-closing mechanism, a cooling fan, a control chamber, and a switching mechanism. The column oven includes an air intake port and an air outlet port. The opening-and-closing mechanism opens and closes the air intake port and the air outlet port. The control chamber is provided outside the column oven. The control chamber is communicated with the inside of the column oven via the air intake port in a state in which the air intake portion is opened by the opening-and-closing mechanism. The control chamber is provided inside thereof with the controller. The switching mechanism switches a wind direction of the cooling fan in a state in which the air intake portion is opened by the opening-and-closing mechanism to direct at least a part of wind from the cooling fan to the air intake port.

A gas chromatograph device is provided with a column oven, an opening-and-closing mechanism, a cooling fan, a control chamber, and a switching mechanism. The column oven includes an air intake port and an air outlet port. The opening-and-closing mechanism opens and closes the air intake port and the air outlet port. The control chamber is provided outside the column oven. The control chamber is communicated with the inside of the column oven via the air intake port in a state in which the air intake portion is opened by the opening-and-closing mechanism. The control chamber is provided inside thereof with the controller. The switching mechanism switches a wind direction of the cooling fan in a state in which the air intake portion is opened by the opening-and-closing mechanism to direct at least a part of wind from the cooling fan to the air intake port.

A thermal module for pre-heating liquid flowing into a liquid chromatography column, includes a trough compartment with two ends, one of the two ends having an electrical socket, a first fluidic assembly, a second fluidic assembly, and a clamp assembly. The clamp assembly includes a rail configured to receive the first fluidic assembly. The clamp assembly includes a carriage slidably mounted to the rail and configured to receive the second fluidic assembly. The carriage is operable to establish a first fluid tight seal between the first fluidic assembly and a chromatography column received within the clamp assembly, and to establish a second fluid tight seal between the second fluidic assembly and the chromatography column. The clamp assembly is disposed within the trough compartment, and the first fluidic assembly is plugged into the electrical socket at the one end of the trough compartment.

A thermal module for pre-heating liquid flowing into a liquid chromatography column, includes a trough compartment with two ends, one of the two ends having an electrical socket, a first fluidic assembly, a second fluidic assembly, and a clamp assembly. The clamp assembly includes a rail configured to receive the first fluidic assembly. The clamp assembly includes a carriage slidably mounted to the rail and configured to receive the second fluidic assembly. The carriage is operable to establish a first fluid tight seal between the first fluidic assembly and a chromatography column received within the clamp assembly, and to establish a second fluid tight seal between the second fluidic assembly and the chromatography column. The clamp assembly is disposed within the trough compartment, and the first fluidic assembly is plugged into the electrical socket at the one end of the trough compartment.

A pump unit comprises a primary piston pump, a secondary piston pump, and a flow path adapted for fluidically connecting in series the primary piston pump and the secondary piston pump. The pump unit's duty cycle comprises a delivery-and-fill phase, in which the primary piston pump supplies a flow of liquid to the secondary piston pump, and during the delivery-and-fill phase, the flow of liquid supplied by the primary piston pump is partly used for filling up the secondary piston pump and partly used for maintaining another flow of liquid dispensed across the secondary piston pump. The flow path comprises a heat exchanger, wherein liquid supplied by the primary piston pump passes through the heat exchanger before being supplied to the secondary piston pump. The heat exchanger is adapted for reducing a temperature difference between a temperature of liquid supplied to heat exchanger and a temperature of the secondary piston pump, in that the heat exchanger is kept at a temperature of the secondary piston pump, so that after having passed the heat exchanger, liquid supplied to the secondary piston pump has substantially the same temperature as the secondary piston pump itself.

A pump unit comprises a primary piston pump, a secondary piston pump, and a flow path adapted for fluidically connecting in series the primary piston pump and the secondary piston pump. The pump unit's duty cycle comprises a delivery-and-fill phase, in which the primary piston pump supplies a flow of liquid to the secondary piston pump, and during the delivery-and-fill phase, the flow of liquid supplied by the primary piston pump is partly used for filling up the secondary piston pump and partly used for maintaining another flow of liquid dispensed across the secondary piston pump. The flow path comprises a heat exchanger, wherein liquid supplied by the primary piston pump passes through the heat exchanger before being supplied to the secondary piston pump. The heat exchanger is adapted for reducing a temperature difference between a temperature of liquid supplied to heat exchanger and a temperature of the secondary piston pump, in that the heat exchanger is kept at a temperature of the secondary piston pump, so that after having passed the heat exchanger, liquid supplied to the secondary piston pump has substantially the same temperature as the secondary piston pump itself.

Certain configurations described herein are directed to gas chromatography devices. In some instances, the gas chromatography devices may comprise at least one heating device which can be moved along a chromatography column to provide a thermal gradient to the chromatography column. In other instances, the gas chromatography devices may comprise a heating device that can receive a moving chromatography column to provide a thermal gradient to the chromatography column. The gas chromatography devices may be configured as portable devices which can be used to perform remote analyses.