US 12,476,100 B2
Ionization device, mass spectrometry system, and ionization method
Kazumasa Kinoshita, Kanagawa (JP); Takao Nishiguchi, Kanagawa (JP); Tomoaki Endo, Kanagawa (JP); and Kenzo Hiraoka, Yamanashi (JP)
Assigned to BIOCHROMATO, INC., Kanagawa (JP); and UNIVERSITY OF YAMANASHI, Yamanashi (JP)
Filed by BIOCHROMATO, INC., Kanagawa (JP); and UNIVERSITY OF YAMANASHI, Yamanashi (JP)
Filed on Aug. 22, 2022, as Appl. No. 17/821,221.
Application 17/821,221 is a continuation of application No. PCT/JP2021/003896, filed on Feb. 3, 2021.
Claims priority of application No. 2020-029310 (JP), filed on Feb. 25, 2020.
Prior Publication US 2023/0187197 A1, Jun. 15, 2023
Int. Cl. H01J 49/04 (2006.01); H01J 49/16 (2006.01)
CPC H01J 49/168 (2013.01) [H01J 49/0422 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An ionization device comprising:
an ion formation section configured to ionize an analyte via a corona discharge; and
a transfer section configured to transfer an ionized analyte to a mass spectrometry apparatus;
wherein the ion formation section and the transfer section are partitioned by one electrode of a pair of electrodes that generate the corona discharge, the one electrode having an opening;
wherein the ion formation section is defined by a space formed between a recess provided in a first end face of a first insulating plate and a second end face of a second insulating plate;
wherein the first insulating plate and the second insulating plate are fixed together with no gap and without any intervening member between the first insulating plate and the second insulating plate;
wherein a discharge needle of the other electrode is inserted into a through-hole formed in the second end face; and
wherein the one electrode is disposed in the recess of the first insulating plate to face the discharge needle at a predetermined distance across the ion formation section.