Title:
Mass spectrometer and ion mobility analyzer
Document Type and Number:
Japanese Patent JP6319466
Kind Code:
B2
Abstract:
An auxiliary electrode 6 which has a cylindrical shape and a reflecting electrode (7) which also has a cylindrical shape are located anterior to a spray flow ejected from an ESI ionization probe (5). An inlet end (8a) of a heated capillary (8) extends into the space between the two electrodes (6, 7). The auxiliary electrode (6) and heated capillary (8) are grounded, while the reflecting electrode (7) is supplied with a direct-current voltage having the same polarity as measurement target ions. As a result, a reflecting electric field which reflects ions originating from sample components as well as charged droplets, being carried by the spray flow, is created within the space between the two electrodes (6, 7), and a focusing electric field for focusing ions onto the inlet end (8a) is also created in an area near the inlet end (8a). The ions originating from sample components are thereby separated from the gas flow and gathered around the inlet end (8a), to be drawn into the heated capillary (8) and sent into a vacuum chamber. Consequently, more ions are subjected to mass spectrometry than in a conventional case, and analysis sensitivity is improved.
Inventors:
Nishiguchi Katsu
Application Number:
JP2016570409A
Publication Date:
May 09, 2018
Filing Date:
January 22, 2015
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
H01J49/10; G01N27/62; H01J49/26; H01J49/42
Domestic Patent References:
| JP200710667A |
Foreign References:
| US20050072934 |
Attorney, Agent or Firm:
Kyoto International Patent Office
Previous Patent: A nondirectional electromagnetic plate and sheet and a manufacturing method for the same
Next Patent: JPS6319467
Next Patent: JPS6319467