The invention provides a device for extracting a vaporizable analyte from a sample gas containing the analyte and unwanted aerosol particles; the device comprising a vapour extraction chamber (2), first (3) and second (4) inlets, and first (5) and second (6) outlets; the vapour extraction chamber (2) being provided with or being linked to a heat source for heating the vapour extraction chamber (2) to a desired temperature to facilitate vaporization of analyte present in the sample gas; the first (3) and second (4) inlets being linked to an upstream end of the vapour extraction chamber (2) and the first (5) and second (6) outlets being linked to a downstream end of the extraction chamber (2); the first inlet (3) allowing a sample of gas containing the analyte and unwanted aerosol particles to be introduced into the vapour extraction chamber (2); the second inlet (4) being connected or connectable to a clean gas supply that does not contain the analyte or unwanted aerosol particles; the device being configured such that, in use, a sample gas flow (7) is established through the vapour extraction chamber between the first inlet (3) and the first outlet (5), and a clean gas flow (8) is established through the vapour extraction chamber between the second inlet (4) and the second outlet (6); whereby analyte in vapour form present in the sample gas flow (7) diffuses into the clean gas flow (8), but the clean gas flow (8) reaching the second outlet is substantially free of the said unwanted aerosol particles; the first outlet (5) serving as a waste outlet for the sample gas flow, and the second outlet (6) being connected or connectable to an instrument for analysing analyte that has diffused into the clean gas flow.

The invention provides a device for extracting a vaporizable analyte from a sample gas containing the analyte and unwanted aerosol particles; the device comprising a vapour extraction chamber (2), first (3) and second (4) inlets, and first (5) and second (6) outlets; the vapour extraction chamber (2) being provided with or being linked to a heat source for heating the vapour extraction chamber (2) to a desired temperature to facilitate vaporization of analyte present in the sample gas; the first (3) and second (4) inlets being linked to an upstream end of the vapour extraction chamber (2) and the first (5) and second (6) outlets being linked to a downstream end of the extraction chamber (2); the first inlet (3) allowing a sample of gas containing the analyte and unwanted aerosol particles to be introduced into the vapour extraction chamber (2); the second inlet (4) being connected or connectable to a clean gas supply that does not contain the analyte or unwanted aerosol particles; the device being configured such that, in use, a sample gas flow (7) is established through the vapour extraction chamber between the first inlet (3) and the first outlet (5), and a clean gas flow (8) is established through the vapour extraction chamber between the second inlet (4) and the second outlet (6); whereby analyte in vapour form present in the sample gas flow (7) diffuses into the clean gas flow (8), but the clean gas flow (8) reaching the second outlet is substantially free of the said unwanted aerosol particles; the first outlet (5) serving as a waste outlet for the sample gas flow, and the second outlet (6) being connected or connectable to an instrument for analysing analyte that has diffused into the clean gas flow.

A gas chromatograph includes a sample introduction portion and a heater block. A contact portion is fit into a first recess of a main body of the sample introduction portion. The heater block is fixed to and positioned with respect to the main body of the sample introduction portion by directly coming into contact with the contact portion provided on the main body of the sample introduction portion. For this reason, the heater block may be securely positioned with respect to the sample introduction portion.

Certain embodiments described herein are directed to systems and methods that can be used to analyze species in a fluid stream. In some configurations, a sorbent tube effective to directly sample aromatics and/or polyaromatics in a fluid stream is described.

A vaporizer device and associated methodology for providing accurate sampling through substantially efficient, complete and uniform single pass vaporization of a liquid sample by avoiding liquid pre-vaporization and downtime attributable to system damage from incomplete vaporization, particularly in the distribution, transportation, and custody transfer of natural gas. The vaporizer device includes at least one input port for receiving a liquid sample, a channel for directing the liquid to a vaporizer core and a heating assembly within the vaporizer core configured to flash vaporize the liquid sample. The vaporized sample can then be passed to an outlet for sample analysis.

A method of detecting an analyte by: providing a derivatizing agent that is reactive with the analyte; delivering the derivatizing agent into a chamber; delivering a sample of a gas suspected of containing the analyte into the chamber before or after delivering the derivatizing agent, while the chamber is maintained at a temperature that retains the derivatizing agent and any analyte and that allows reaction between the derivatizing agent and any analyte in the chamber to form a derivatized analyte; warming the chamber to cause evaporation of any derivatized analyte; and delivering the derivatized analyte in the chamber into a gas chromatograph column.

A vaporizer device and associated methodology for providing accurate sampling through substantially efficient, complete and uniform single pass vaporization of a liquid sample by avoiding liquid pre-vaporization and downtime attributable to system damage from incomplete vaporization, particularly in the distribution, transportation, and custody transfer of natural gas. The vaporizer device includes at least one input port for receiving a liquid sample, a channel for directing the liquid to a vaporizer core and a heating assembly within the vaporizer core configured to flash vaporize the liquid sample. The vaporized sample can then be passed to an outlet for sample analysis.

A vaporizer device and associated methodology for providing accurate sampling through substantially efficient, complete and uniform single pass vaporization of a liquid sample by avoiding liquid pre-vaporization and downtime attributable to system damage from incomplete vaporization, particularly in the distribution, transportation, and custody transfer of natural gas. The vaporizer device includes at least one input port for receiving a liquid sample, a channel for directing the liquid to a vaporizer core and a heating assembly within the vaporizer core configured to flash vaporize the liquid sample. The vaporized sample can then be passed to an outlet for sample analysis.

A gas chromatograph is provided which is capable of effectively reducing the amount consumed of a carrier gas, reducing the time and effort required for an operator to manually set parameters, and preventing damages to a column and a detector due to a setting mistake. In a case where a stop operation for the power supply of the gas chromatograph is performed (Yes in step S101), the flow rate of a carrier gas to be supplied to a sample vaporization chamber is decreased and the temperatures of the column and the detector are sufficiently lowered (steps S102 to S104), and then the power supply of the gas chromatograph is switched over from an ON state to an OFF state (step S106).

Technologies for rapid equilibration for water isotope analysis are disclosed. In at least one illustrative embodiment, a vaporizer may include an injection block that defines a chamber and a septum positioned over an inlet of the chamber to seal the chamber. The chamber may be configured to be fluidly coupled to a pump to develop a vacuum within the chamber, and the septum may be configured to receive a needle that is inserted into the chamber. A thermally conductive wool may be positioned within the chamber and may be configured to receive a tip of the needle.