Provided is a gas chromatograph device capable of appropriately determining that a temperature of an entirety of a heating target has stabilized after cooling the heating target in a column oven to a target temperature after a temperature-rising analysis. A gas chromatograph device capable of performing a temperature-rising analysis cools an inside of a column oven by a cooling mechanism. When a detection temperature by a temperature sensor for detecting a temperature of the heating target has reached a target temperature after the inside of the column oven has been cooled, the heating target is heated by a heater. Upon reaching of the detection temperature of the temperature sensor to the target temperature, it is determined whether or not the temperature of the entirety of the heating target has stabilized based on power consumption of the heater.

A column oven is provided with an inner casing forming an inner space therein, the inner space being configured to adjust a temperature of a separation column for gas chromatography in a state in which the separation column is accommodated in the inner space, a temperature control element provided in the inner space to adjust the temperature of the inner space, and a heat insulation material layer surrounding an outer peripheral surface of the inner casing, the heat insulation material being composed of a fibrous material. The heat insulation material layer includes a first layer having a first bulk density ρ.sub.1 and a second layer enclosing an outer side of the first layer, the second layer having a second bulk density ρ.sub.2 smaller than the first bulk density ρ.sub.1.

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.

The disclosed chromatographic system enables sample slices to be moved back and forth between columns to rapidly isolate and measure a single or multiple components in a complex matrix. The independently controlled, two column system allows for the flow-recycling to take place since the sample slice can be effectively halted on either column until the second column is thermally ready to accept it again. The plumbing scheme also allows one to make an infinitely long column by being able to move components back and forth between the two by activating and deactivating the valve at the appropriate times.

A column oven includes a main unit, an auxiliary unit, an outside sensor, an internal sensor, a temperature range holding section for holding a plurality of temperature ranges, a temperature range specifying portion for specifying the temperature range to which the outside temperature belongs, a temperature control program holding section for holding a temperature control program for a control method of the main unit and the auxiliary unit in each temperature range in such a way that outputs of the main unit and the auxiliary unit are continuous in the temperature ranges that are adjacent to each other, a control method setting portion for setting a control method of the main unit and the auxiliary unit based on the temperature range specified and the temperature control program, and a temperature control portion for controlling the main unit and the auxiliary unit.

A heating assembly includes a base plate. The heating assembly also includes a heating component coupled to the base plate configured to heat an enclosure of the heating assembly and a fan assembly coupled to the base plate configured to circulate the heated air within the enclosure of the heating assembly.

A detector for a chromatograph includes a light source, and a light detector that detects light generated based on turning on of the light source, wherein the light source includes a deuterium lamp, and a deuterium lamp power supply circuit connected to the deuterium lamp, and the deuterium lamp power supply circuit includes a DC voltage generation circuit that generates a DC voltage by performing a switching operation, a rectifying operation and a smoothing operation, a voltage application circuit that applies a DC voltage generated by the DC voltage generation circuit to the deuterium lamp, a first feedback circuit that feeds a first feedback voltage changing depending on a DC voltage to the DC voltage generation circuit such that the DC voltage generated by the DC voltage generation circuit becomes close to a discharge maintaining voltage, after electric discharge of the deuterium lamp is started, and a constant current control circuit that controls a discharge current of the deuterium lamp to be constant.

An analysis system includes a setting device, an execution device, a determination device, and a notification device, and analyzes a sample by combining functions of a plurality of units. The setting device sets an analysis condition for each of the plurality of units. The execution device can execute the function of each of the plurality of units prior to the analysis of the sample. The determination device determines whether preparation for starting the analysis is completed for each of the plurality of units based on a comparison between a state of the unit and the analysis condition corresponding to the unit. The notification device notifies an analyst of a determination result by the determination device.

An object is to increase an efficiency of removing carbon dioxide derived from inorganic carbon. An inspection apparatus includes: a column that separates a group of substances contained in an aqueous sample by size; an addition unit that adds a reagent, which acidifies the aqueous sample, into a channel; a degassing unit provided downstream of the addition unit for degassing carbon dioxide; a measurement unit that measures organic carbon contained in each substance from which the carbon dioxide has been removed; and a temperature maintaining unit that maintains a temperature of each of the column and a container in which a gas-permeable tube of the degassing unit is housed.

Implemented is an analysis apparatus column oven equipped with a plurality of columns, which is capable of efficiently performing heat conduction on column basis, recognizing a column cartridge that holds a column, and being easily exchanged on column basis. The column change mechanism 105 includes the ferrule 206, the movable ferrule connector 207, the pipe 208, the fastener pull 209, the fastener fitting 210, the column cartridge presser 211, the slide guide 212, the RFID reader 214, the fixed wall 215, the column changer heat insulating member 216, the fixed bottom plate 217, the receiver 218, and the fixed fitting 219. A plurality of column cartridges 104 can be installed in the heat block 101, and are in contact with the column heat block 103 to control the temperature in the column cartridges 104. The column cartridge 104 is fixed between left and right column change mechanisms 105, and when the fixed column cartridge 104 is opened, the column change mechanism 105 on the left side is moved leftward and opened.