A mobile phase temperature control device for a supercritical fluid apparatus is used in a supercritical fluid apparatus including a separation column, and includes a cartridge heater, a flow path portion and a first temperature sensor. The cartridge heater has a rod shape. The flow path portion is wound around the cartridge heater, and a mobile phase is guided to the separation column of the supercritical fluid apparatus by the flow path portion. The mobile phase is put in a supercritical state at least in the separation column. The first temperature sensor is attached to the flow path portion, and the temperature of the flow path portion is detected by the first temperature sensor.

A heater integrated gas chromatography (GC) column device according to the present invention is capable of precisely and uniformly controlling a temperature by having a high thermal conductivity, and raising and lowering a temperature at a high speed by having a low thermal mass, such that a measuring time is significantly decreased. The GC column is in contact with a bobbin with a homogeneous temperature distribution, and thus a temperature is homogeneously distributed in each GC column. Further, the heater integrated GC column device according to the present invention has the above-described effects and may have a smaller size.

This disclosure relates a device for a chromatographic system, comprising: a chamber defining an internal portion, a capillary disposed within the chamber, the capillary having an input, an output, and an elongate body extending between the input and the output, a cold finger having a first portion in thermal contact with a portion of the elongate body to define a capillary trapping zone, wherein the first portion of the cold finger extends to a second portion that is situated external to the chamber, a heater in thermal contact with the trapping zone of the capillary and configured to transfer heat to the trapping zone, a thermal buffer configured to buffer the heat from the heater into the cold finger and thereby retain the heat within the trapping zone of the capillary, a cooling device arranged external to the chamber and thermally connected to the second portion of the cold finger to define a primary conduction zone, wherein the cooling device is configured to generate a cooling temperature zone at the primary conduction zone, a controller configured to selectively alternate the trapping zone between a cooling temperature by turning off the heat and using the cooling device together with its engagement with the cold finger, and an injection temperature using the heater, wherein the heater alternates between an off state and an on state and a user defined frequency.

A heating assembly includes a heater extending in a longitudinal direction from a first end to a second end. Heat transfer fins are thermally coupled to the heater and extend in a direction transverse to the longitudinal direction. An airflow component is positioned proximate one of the first and second end and is configured to generate airflow along the plurality of heat transfer fins toward the other of the first and second end.

A method for modulating analytes in a gaseous stream passing through a capillary, wherein the analytes are retained in a trapping zone of the capillary, or allowed to pass therethrough, based on certain conditions. The method includes, during a first time period, heating the trapping zone of the capillary to a first temperature to desorb analytes therewithin and allow the analytes to pass therethrough, and during a second time period, cooling the capillary to a second temperature that is sufficient to trap and focus the analytes within the trapping zone. During the first time period, the method also includes retaining heat at the capillary during to minimize the load on a cooling device thermally connected thereto, and during the second time period, selectively allowing thermal transfer toward the cooling device.

A modular gas detection system includes a primary gas chromatograph, a constant volume extractor positionable to provide a continuous fluid sample to the primary gas chromatograph, and a total hydrocarbon analyzer. The modular gas detection system also includes a processing device and a memory device including instructions executable by the processing device for causing the processing device to perform operations. The operations include adjusting a detection scheme of the primary gas chromatograph to update a detection range for the continuous fluid sample to detect different hydrocarbons within a single column. Further, the operations include controlling routing of the continuous fluid sample from the constant volume extractor to the primary gas chromatograph and the total hydrocarbon analyzer.

A system and method of determining levels of contaminants in a base gas. A gas chromatography column is used as part of a cold trap. A sample of a base gas is fed through the gas chromatography column. Due to the temperature of the gas chromatography column, some of the contaminants concentrate. A purified carrier gas is directed through the reinforced tube assembly after contaminants have collected. The gas chromatography column is heated to a second temperature that releases at least some of the concentrated contaminants. The contaminants mix with the purified carrier gas to create a contaminated carrier gas. The contaminated carrier gas is directed to one or more testing units that analyze the contaminated carrier gas to quantify the contaminants.

A thermal modulator for gas chromatography includes an analytical capillary to be traversed by analytes and that is interposed between two gas chromatographic columns; a cooling system having a cold zone, a support element associated with the cold zone and supporting a portion of the analytical capillary at a corresponding or slightly higher temperature than the cold zone, so as to define a trapping portion of the analytes; a control system, which selectively controls the emission of pulsed current to electrically conductive elements associated with the analytical capillary to heat the trapping portion and cause the release or desorption of previously immobilized analytes; and a heating system of a portion of the analytical capillary, positioned outside of the support element and upstream of the support element, so as to generate a rapid expansion of the gas contained in the portion and facilitate the advancement of the released or desorbed analytes.

A flexible, foldable light-weight gas chromatography transfer line suitable for connecting a gas chromatograph (GC) to a spectrometer, such as a mass spectrometer or optical spectrometer, in particular to the ion source of the spectrometer, such as an inductively coupled plasma (ICP) ion source. The transfer line has a heating arrangement that allows maintaining an even temperature profile, which improves quality of spectra. The transfer line has low thermal mass and the heating can be controlled with the control unit of the GC.

A system and method for sample analysis using a portable gas chromatography (GC)-mass spectrometry (MS) is provided. The GC-MS system includes an injector configured to accept a sample containing a mixture of chemicals and release at least part of the sample for a separation by GC, a MEMS GC column with an integrated heater configured to accept and at least partly separate the mixture of chemicals, and a mass analyzer in a vacuum chamber configured to accept and mass-analyze the released separated chemicals. The MEMS GC column with the integrated heater is located mostly inside the MS vacuum chamber.