US 12,146,868 B2
Pump unit and chromatograph
Jun Yanagibayashi, Kyoto (JP); Shinya Imamura, Kyoto (JP); Kenichi Yasunaga, Kyoto (JP); Yasushi Ishihama, Kyoto (JP); Koshi Imami, Kyoto (JP); Tomoya Niinae, Kyoto (JP); and Yumi Komori, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP); and Kyoto University, Kyoto (JP)
Appl. No. 17/778,832
Filed by SHIMADZU CORPORATION, Kyoto (JP); and Kyoto University, Kyoto (JP)
PCT Filed Nov. 5, 2020, PCT No. PCT/JP2020/041340
§ 371(c)(1), (2) Date May 21, 2022,
PCT Pub. No. WO2021/100474, PCT Pub. Date May 27, 2021.
Claims priority of application No. 2019-211764 (JP), filed on Nov. 22, 2019.
Prior Publication US 2023/0010923 A1, Jan. 12, 2023
Int. Cl. G01N 30/32 (2006.01); G01N 30/14 (2006.01); G01N 30/02 (2006.01)
CPC G01N 30/32 (2013.01) [G01N 30/14 (2013.01); G01N 2030/027 (2013.01); G01N 2030/146 (2013.01); G01N 2030/326 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A pump unit of a chromatograph including a separation column, the pump unit comprising:
a pump that pumps a mobile phase through a flow path to the separation column; and
a metal ion trap including a filter element provided at a position farther downstream than the pump in the flow path between pump and the separation column, wherein
the pump includes a metal member that comes into contact with the mobile phase, and
the filter element includes a metal ion retention structure for retaining metal ions by interacting with the metal ions eluted into the mobile phase due to contact between the metal member and the mobile phase.