US 12,078,618 B2
Gas chromatograph-mass spectrometer
Hideki Sato, Kyoto (JP); and Takeshi Uchida, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/617,508
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed Jun. 10, 2019, PCT No. PCT/JP2019/022968
§ 371(c)(1), (2) Date Dec. 8, 2021,
PCT Pub. No. WO2020/250282, PCT Pub. Date Dec. 17, 2020.
Prior Publication US 2022/0252552 A1, Aug. 11, 2022
Int. Cl. G01N 30/06 (2006.01); H01J 49/04 (2006.01); G01N 30/02 (2006.01)
CPC G01N 30/06 (2013.01) [H01J 49/04 (2013.01); G01N 2030/025 (2013.01); G01N 2030/062 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A gas chromatograph-mass spectrometer comprising:
a gas chromatograph having a column that separates a sample into components;
a mass spectrometer provided in a vacuum housing; and
an interface that introduces a sample that has been separated into components in the gas chromatograph into the mass spectrometer,
the interface comprising:
a partition wall fixed to the vacuum housing to close an opening formed in the vacuum housing;
a line pipe that is fixed to the partition wall to penetrate the partition wall, includes a sample outlet line of the column and introduces the sample into the mass spectrometer;
a heater that heats the line pipe in an axial direction; and
a fixer that fixes the heater being in contact with the partition wall,
wherein the fixer presses the heater against the partition wall,
the heater is placed around the line pipe,
the fixer is a nut member on which a female screw portion, that is to be engaged with a male screw portion formed on an outer periphery of the line pipe, is formed, and
the heater is fixed to be pressed against the partition wall when the nut member is rotated and fastened with respect to the line pipe.