# US 12,007,372 B2 · Gas chromatograph device and analysis support method for gas chromatograph device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,372 B2 - Document ID: US12007372B2 - Status: Granted - Kind: B2 - Application number: 17/258,996 - Filed: 2018-09-03 - Published: 2021-10-07 - Granted: 2024-06-11 - Earliest claimed: 2018-09-03 - Assignees: Shimadzu Corporation - Applicants: Shimadzu Corporation - Inventors: Yasuhiro Kimoto; Takuya Isoi - Web page: https://patentgrep.com/patent/US12007372B2 ## CPC - G01N 30/78: using more than one detector - G06F 3/0482: Interaction with lists of selectable items, e.g. menus - G01N 35/00: Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor - G01N 2030/025: {Gas chromatography} - G06F 3/04847: Interaction techniques to control parameter settings, e.g. interaction with sliders or dials - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A gas chromatograph device (100) includes a calculator (2) configured to acquire information on conduits (36) between a branch unit (33) and detectors (34) and information that identifies types of the detectors connected to the conduits, the calculator being configured to calculate at least one of gas flow rates in the conduits, gas linear velocities in the conduits, or a pressure in the branch unit based on the acquired information. ## Claims ### Claim 1 A gas chromatograph device comprising: a sample introduction unit configured to send a carrier gas and a sample gas; a column configured to separate components of the sample gas introduced from the sample introduction unit; a branch unit provided downstream of the column where a conduit of the sample gas is branched into a plurality of branched conduits; a plurality of detectors connected to the branch unit; and a calculator configured to acquire; information on a connection of the plurality of branched conduits between the branch unit and the plurality of detectors; and information for identifying types of the plurality of detectors connected to the plurality of branched conduits, the calculator being configured to calculate at least one of; gas flow rates in the plurality of branched conduits, gas linear velocities in the plurality of branched conduits, or a pressure in the branch unit based on the acquired information, wherein the branch unit is connected to the plurality of detectors via a plurality of resistance tubes as the plurality of branched conduits and is configured to distribute the sample gas from the column to each of the plurality of resistance tubes, and wherein the calculator is further configured to calculate a branch ratio of a gas distributed to each of the plurality of resistance tubes connected to the plurality of detectors based on both information of the plurality of resistance tubes and information that identifies types of the plurality of detectors respectively connected to the plurality of resistance tubes. ### Claim 2 (depends on 1) The gas chromatograph device according to claim 1, wherein the calculator is configured to: acquire information on lengths and inner diameters of the plurality of branched conduits as the information on the plurality of branched conduits; acquire information on pressures in the plurality of detectors connected to the plurality of branched conduits based on the information that identifies the types of the plurality of detectors; and acquire information on an analysis condition including any one of the gas flow rates, the gas linear velocities, and the pressure in the branch unit so as to calculate any other of the gas flow rates, the gas linear velocities, and the pressure in the branch unit based on the acquired information. ### Claim 3 (depends on 1) The gas chromatograph device according to claim 1, further comprising: a display configured to display an interface screen configured to receive an information input; wherein the calculator is configured to cause the display to display the interface screen configured to allow the information on the plurality of branched conduits and the information that identifies the types of the plurality of detectors connected to the plurality of branched conduits to be entered in association with each other for respective conduits of the plurality of branched conduits branched from the branch unit. ### Claim 4 (depends on 3) The gas chromatograph device according to claim 3, wherein the calculator is configured to cause the display to display the interface screen including a first entry field for entering the information on the plurality of branched conduits and a second entry field for entering the information that identifies the types of the plurality of detectors connected to the plurality of branched conduits identified by the first entry field. ### Claim 5 (depends on 4) The gas chromatograph device according to claim 4, further comping: a plurality of connectors configured to allow the plurality of branched conduits from the branch unit and the plurality of detectors to be connected thereto; wherein the calculator is configured to selectably display the types of the plurality of detectors connected to the plurality of connectors in the second entry field. ### Claim 6 (depends on 1) The gas chromatograph device according to claim 1, wherein the branch unit is connected to one of the plurality of detectors via a second column a one of the plurality of branched conduits, the second column being provided separately from a first column on an upstream side thereof; and the calculator is configured to calculate at least one of a gas flow rate in the second column, a gas linear velocity in the second column, or the pressure in the branch unit for achieving a flow rate or a linear velocity specified as an analysis condition based on information on the second column and information that identifies a type of detector connected to the second column. ### Claim 7 An analysis support method for a gas chromatograph device comprising a branch unit provided downstream of a column configured to separate components of a sample gas introduced from a sample introduction unit where a conduit of the sample gas is branched into a plurality of branched conduits, and a plurality of detectors connected to the branch unit, the analysis support method comprising: acquiring information on a connection of the plurality of branched conduits between the branch unit and the plurality of detectors; and acquiring information for identifying types of the plurality of detectors connected to the plurality of branched conduits; and calculating at least one of: gas flow rates in the plurality of branched conduits, gas linear velocities in the plurality of branched conduits, or a pressure in the branch unit based on the acquired information, wherein the branch unit is connected to the plurality of detectors via a plurality of resistance tubes as the plurality of branched conduits, and wherein the analysis support method further comprises: distributing the sample gas from the column to each of the plurality of resistance tubes, and calculating a branch ratio of a gas distributed to each of the plurality of resistance tubes connected to the plurality of detectors based on both information of the plurality of resistance tubes and information that identifies types of the plurality of detectors respectively connected to the plurality of resistance tubes.