US 12,222,336 B2
Sample introduction device
Akira Aono, Kyoto (JP); Shota Hata, Kyoto (JP); Naru Maruoka, Kyoto (JP); and Hideki Sato, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/641,679
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed Nov. 18, 2020, PCT No. PCT/JP2020/043036
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/111881, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. PCT/JP2019/047647 (WO), filed on Dec. 5, 2019.
Prior Publication US 2022/0326195 A1, Oct. 13, 2022
Int. Cl. G01N 30/20 (2006.01); G01N 30/26 (2006.01); G01N 30/88 (2006.01)
CPC G01N 30/20 (2013.01) [G01N 30/26 (2013.01); G01N 30/88 (2013.01); G01N 2030/201 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A sample introduction device comprising:
an insertion tube inserted into a head space of a sample container;
a gas supply pipe that can communicate with the insertion tube and pressurizes the head space to a predetermined pressure by supplying gas into the sample container via the insertion tube;
a collection unit that can communicate with the insertion tube and collects a component in gas derived from the head space;
a discharge pipe that can communicate with the insertion tube via the collection unit; and
a plurality of valves configured to perform switching between a pressurized state in which gas is supplied from the gas supply pipe to the insertion tube and a derivation state in which gas in the head space that is pressurized is derived from the insertion tube to the discharge pipe via the collection unit, wherein
the plurality of valves includes a discharge valve that puts the insertion tube and the discharge pipe into a non-communication state in the pressurized state, and puts the insertion tube and the discharge pipe into a communication state in the derivation state, the sample introduction device further comprising:
an additional channel for supplying gas to a channel formed by the gas supply pipe or a pipe that connects the gas supply pipe to the discharge pipe between the collection unit and the discharge valve in the derivation state, wherein
the plurality of valves includes an introduction valve,
the additional channel supplies gas to the channel between the collection unit and the discharge valve at a pressure lower than the predetermined pressure and higher than a pressure inside the discharge pipe, and
the additional channel branches from the gas supply pipe on an upstream side of the introduction valve and merges with the gas supply pipe on a downstream side of the introduction valve.