公开(公告)号：US20180061622A1

公开(公告)日：2018-03-01

申请号：US15558389

申请日：2016-08-24

Applicant: PUBLIC UNIVERSITY CORPORATION YOKOHAMA CITY UNIVERSITY ,  AMR INCORPORATED

Inventor： Kanako SEKIMOTO ,  Mitsuo TAKAYAMA ,  Hiroshi HIKE ,  Motoshi SAKAKURA

IPC: H01J49/14

CPC classification number: H01J49/145 ,  H01J49/168

Abstract: An atmospheric pressure ionization method uses: a gas flow passage control unit (26) and a gas outlet nozzle (24) configured to jet argon gas to an atmospheric atmosphere; a needle electrode (19) arranged between an outlet port of the gas outlet nozzle (24) and an introduction port of an ion introduction pipe (6) that includes a tip end portion formed into a curved surface; a needle electrode support mechanism (20); and an electric power generation unit (22) configured to apply extremely low electric power to the needle electrode (19). The atmospheric pressure ionization method includes: applying the extremely low electric power to the needle electrode (19) from the electric power generation unit (22) to generate a dark discharge; exciting the argon gas with the dark current; and causing the excited argon gas and the sample to react with each other, to thereby ionize the sample.

公开(公告)号：US10262852B2

公开(公告)日：2019-04-16

申请号：US15558389

申请日：2016-08-24

Applicant: PUBLIC UNIVERSITY CORPORATION YOKOHAMA CITY UNIVERSITY ,  AMR INCORPORATED

Inventor： Kanako Sekimoto ,  Mitsuo Takayama ,  Hiroshi Hike ,  Motoshi Sakakura

IPC: H01J49/14 ,  H01J49/16

Abstract: An atmospheric pressure ionization method uses: a gas flow passage control unit (26) and a gas outlet nozzle (24) configured to jet argon gas to an atmospheric atmosphere; a needle electrode (19) arranged between an outlet port of the gas outlet nozzle (24) and an introduction port of an ion introduction pipe (6) that includes a tip end portion formed into a two-sheeted hyperboloid of revolution having a radius of curvature of 1 μm or more and less than 30 μm; a needle electrode support mechanism (20); and an electric power generation unit (22) configured to apply a voltage to the needle electrode (19). The atmospheric pressure ionization method includes: applying a voltage of 1.8 kV or more to the needle electrode (19) from the voltage generation unit (22) to generate a dark discharge; exciting the argon gas with the dark current; and causing the excited argon gas and the sample to react with each other, to thereby ionize the sample.