The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2019
Filed:
Aug. 24, 2016
Public University Corporation Yokohama City University, Kanagawa, JP;
Amr Incorporated, Tokyo, JP;
Kanako Sekimoto, Kanagawa, JP;
Mitsuo Takayama, Kanagawa, JP;
Hiroshi Hike, Tokyo, JP;
Motoshi Sakakura, Tokyo, JP;
PUBLIC UNIVERSITY CORPORATION YOKOHAMA CITY UNIVERSITY, Kanagawa, JP;
AMR INCORPORATED, Tokyo, JP;
Abstract
An atmospheric pressure ionization method uses: a gas flow passage control unit () and a gas outlet nozzle () configured to jet argon gas to an atmospheric atmosphere; a needle electrode () arranged between an outlet port of the gas outlet nozzle () and an introduction port of an ion introduction pipe () 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 (); and an electric power generation unit () configured to apply a voltage to the needle electrode (). The atmospheric pressure ionization method includes: applying a voltage of 1.8 kV or more to the needle electrode () from the voltage generation unit () 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.