	US 12,106,954 B2
	Dielectric barrier discharge ionization, analytical instrument and ionization method
Yiming Lin, Shanghai (CN); and Wenjian Sun, Shanghai (CN)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/277,999
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed Oct. 17, 2019, PCT No. PCT/JP2019/040900 § 371(c)(1), (2) Date Mar. 19, 2021, PCT Pub. No. WO2020/080464, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 201811212474.7 (CN), filed on Oct. 18, 2018.
Prior Publication US 2021/0351027 A1, Nov. 11, 2021
Int. Cl. H01J 49/16 (2006.01); H01J 49/04 (2006.01); H01J 49/26 (2006.01)

CPC H01J 49/16 (2013.01) [H01J 49/04 (2013.01); H01J 49/26 (2013.01)]

15 Claims

1. A dielectric barrier discharge ionization apparatus, comprising a dielectric barrier discharge tube and an electrode pair consisting of a first electrode and a second electrode, wherein at least a portion of the dielectric barrier discharge tube is provided between the first electrode and the second electrode, the electrode pair ionizing a sample after power is turned on to the electrode pair, the dielectric barrier discharge tube is in communication with a vacuum pump, and a pressure range in the dielectric barrier discharge tube is 0.01 to 100 Pa, further comprising a sample inlet communicated with the dielectric barrier discharge tube, wherein the sample inlet is a through hole covered by a semi-permeable membrane, and the semi-permeable membrane isolates air from entering the dielectric barrier discharge tube while the sample to be detected permeates the semi-permeable membrane.