A hydrogen flame ionization detector includes a nozzle configured to eject a sample gas upward, a cylindrical collector provided above the nozzle with a longitudinal direction thereof vertically oriented, the collector being configured to collect ions generated by a hydrogen flame formed at a tip of the nozzle, an insulator provided to hold the collector therein in such a manner as to extend in a radially inward direction of the collector, and a collector housing configured to accommodate the collector therein in such a manner as to surround an outer peripheral surface of the collector while holding a peripheral portion of the insulator. An accumulation suppression structure is provided above the insulator to suppress a material emitted from an upper end of the collector from being accumulated in such a manner as to shorten an insulation distance between the collector and the collector housing.

A hydrogen flame ionization detector includes a nozzle configured to eject a sample gas upward, a cylindrical collector provided above the nozzle with a longitudinal direction thereof vertically oriented, the collector being configured to collect ions generated by a hydrogen flame formed at a tip of the nozzle, an insulator provided to hold the collector therein in such a manner as to extend in a radially inward direction of the collector, and a collector housing configured to accommodate the collector therein in such a manner as to surround an outer peripheral surface of the collector while holding a peripheral portion of the insulator. An accumulation suppression structure is provided above the insulator to suppress a material emitted from an upper end of the collector from being accumulated in such a manner as to shorten an insulation distance between the collector and the collector housing.

The present disclosure provides methods for determining adsorption isotherms for complex mixtures. In at least one embodiment, a method for obtaining adsorption isotherms for liquid mixtures includes providing a column comprising an adsorbent. The method includes delivering a composition to the column, the composition comprising a multi-component feed and a solvent. The method includes collecting a sample from the column and introducing the sample to a two dimensional gas chromatograph to determine a time-series concentration of one or more components of the sample. The method includes integrating the time-series concentration of at least one of the one or more components to determine an isotherm of the at least one component. The method includes obtaining quantitative information of the at least one component, based on the isotherm of the at least one component.

The present disclosure provides methods for determining adsorption isotherms for complex mixtures. In at least one embodiment, a method for obtaining adsorption isotherms for liquid mixtures includes providing a column comprising an adsorbent. The method includes delivering a composition to the column, the composition comprising a multi-component feed and a solvent. The method includes collecting a sample from the column and introducing the sample to a two dimensional gas chromatograph to determine a time-series concentration of one or more components of the sample. The method includes integrating the time-series concentration of at least one of the one or more components to determine an isotherm of the at least one component. The method includes obtaining quantitative information of the at least one component, based on the isotherm of the at least one component.

A method for analyzing light n-alkane components and carbon isotopes in deep and ultra-deep source rocks includes: (S1) subjecting a 5A molecular sieve column to aging; (S2) pyrolyzing a source rock; and allowing a pyrolysis product to enter the 5A molecular sieve column; where n-alkanes are adsorbed and retained by the 5A molecular sieve column; allowing an outflow to pass through a fractionation plate and an empty column or a weak polarity column to be discharged; and (S3) performing programmed heating such that the n-alkanes adsorbed on the 5A molecular sieve column are successively desorbed according to molecular weight, and then pass through the fractionation plate and the HP-5 or DB-5 column to enter a mass spectrometer for composition analysis or isotopic analysis. An analysis system is further provided.

A method for analyzing light n-alkane components and carbon isotopes in deep and ultra-deep source rocks includes: (S1) subjecting a 5A molecular sieve column to aging; (S2) pyrolyzing a source rock; and allowing a pyrolysis product to enter the 5A molecular sieve column; where n-alkanes are adsorbed and retained by the 5A molecular sieve column; allowing an outflow to pass through a fractionation plate and an empty column or a weak polarity column to be discharged; and (S3) performing programmed heating such that the n-alkanes adsorbed on the 5A molecular sieve column are successively desorbed according to molecular weight, and then pass through the fractionation plate and the HP-5 or DB-5 column to enter a mass spectrometer for composition analysis or isotopic analysis. An analysis system is further provided.

A hydrogen flame ionization detector includes a nozzle configured to eject a sample gas upward, a cylindrical collector provided above the nozzle with a longitudinal direction thereof vertically oriented, the collector being configured to collect ions generated by a hydrogen flame formed at a tip of the nozzle, an insulator provided to hold the collector therein in such a manner as to extend in a radially inward direction of the collector, and a collector housing configured to accommodate the collector therein in such a manner as to surround an outer peripheral surface of the collector while holding a peripheral portion of the insulator. An accumulation suppression structure is provided above the insulator to suppress a material emitted from an upper end of the collector from being accumulated in such a manner as to shorten an insulation distance between the collector and the collector housing.

A hydrogen flame ionization detector includes a nozzle configured to eject a sample gas upward, a cylindrical collector provided above the nozzle with a longitudinal direction thereof vertically oriented, the collector being configured to collect ions generated by a hydrogen flame formed at a tip of the nozzle, an insulator provided to hold the collector therein in such a manner as to extend in a radially inward direction of the collector, and a collector housing configured to accommodate the collector therein in such a manner as to surround an outer peripheral surface of the collector while holding a peripheral portion of the insulator. An accumulation suppression structure is provided above the insulator to suppress a material emitted from an upper end of the collector from being accumulated in such a manner as to shorten an insulation distance between the collector and the collector housing.

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).

One end of carrier gas channel, purge gas channel and split gas channel is connected to sample gasification chamber. The other end of carrier gas channel, purge gas channel, and split gas channel is connected to a flow rate control mechanism in the form of carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block respectively. Carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block constitute a flow rate control unit. This reduces the possibility of leakage of gas to the outside and admixture of impurities from the outside in the flow rate control mechanism.