US 12,217,953 B2
Ion source and mass spectrometer
Hideki Hasegawa, Tokyo (JP); Masuyuki Sugiyama, Tokyo (JP); and Yuichiro Hashimoto, Tokyo (JP)
Assigned to HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
Appl. No. 17/781,449
Filed by Hitachi High-Tech Corporation, Tokyo (JP)
PCT Filed Oct. 15, 2020, PCT No. PCT/JP2020/038983
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2021/124666, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-229656 (JP), filed on Dec. 19, 2019.
Prior Publication US 2023/0005730 A1, Jan. 5, 2023
Int. Cl. H01J 49/00 (2006.01); G01N 27/623 (2021.01); H01J 49/04 (2006.01); H01J 49/16 (2006.01)
CPC H01J 49/167 (2013.01) [G01N 27/623 (2021.01); H01J 49/0445 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ion source comprising:
a capillary into which a sample liquid solution is introduced, the capillary being configured to supply an ion or a droplet; and
a pipe configured to supply a sample liquid solution to the capillary, wherein:
the capillary has a capillary upstream-side end face on an upstream side, and has a capillary downstream-side end face on a downstream side, and an outer diameter of the capillary upstream-side end face is greater than an outer diameter of the capillary downstream-side end face;
the capillary has a large-diameter part that forms the capillary upstream-side end face on the upstream side, and the large-diameter part has a large-diameter part downstream side face on the downstream side;
the pipe has a pipe downstream end face on the downstream side;
the ion source includes a capillary retaining unit configured to retain the capillary, the capillary retaining unit having an upstream end and a downstream end;
the capillary retaining unit has a hole proximate to the upstream end of the capillary retaining unit through which the capillary downstream-side end face is passable and has a face on which the large-diameter part downstream side face is installable;
the ion source includes a pipe retaining unit configured to retain the pipe; and
the capillary retaining unit and the pipe retaining unit are disposed such that the capillary upstream-side end face contacts the pipe downstream end face to connect the capillary to the pipe,
wherein the capillary retaining unit hole comprises a tapered part, the tapered part having a wider diameter at the upstream end of the capillary retaining unit and tapering to a narrower diameter downstream of the upstream end of the capillary retaining unit.