Ion guide for mass spectrometer and ion source using same

A technology of ion guidance and ion source, which is applied in the direction of mass spectrometer, ion source/gun, electron/ion optical device, etc., to achieve the effect of improving ion transfer efficiency

Pending Publication Date: 2021-01-22
BIONEER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ion guides of this form have the disadvantage that the electric field generated from the RF multipole ring 120' is only formed around the RF multipole ring 120'

Method used

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  • Ion guide for mass spectrometer and ion source using same
  • Ion guide for mass spectrometer and ion source using same
  • Ion guide for mass spectrometer and ion source using same

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Embodiment Construction

[0044] In the case of mass spectrometers using atmospheric pressure ionization (API-MS), how efficiently ions are transferred from the ion source to the vacuum with the mass spectrometer is a major factor in determining the analytical performance of the device.

[0045] In other words, ion transfer efficiency becomes an important factor in determining the detection limit of a mass spectrometer. Modern API-MS uses a vacuum system that goes through several vacuum stages in which the pressure is gradually reduced, and uses an ion guide in each vacuum stage. The present invention effectively collects ions scattered at various angles, and reduces the energy of ions generated due to collisions of ions with background gas, so ions are collected on the central axis of the ion guide and are efficiently transferred to the lower level one.

[0046] The ion guide according to the present invention has a shape in which DC rings and RF multipole rings (low-thickness annular multipole elect...

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Abstract

The present invention relates to an ion guide for transferring ions to a mass spectrometer. The ion guide of the present invention is characterized in that a plurality of DC rings and a plurality of RF multi-pole rings with a plurality of electrodes are arranged so as to intersect with each other between an inlet into which the ions move and an outlet for transferring the ions, wherein the inner diameter of the DC rings is kept constant and the inner diameter of the RF multi-pole rings gradually decreases in a direction from the inlet to the outlet.

Description

technical field [0001] The present invention relates to mass spectrometers, and more particularly to ion guides for mass spectrometers and ion sources using the ion guides. Background technique [0002] Various methods are known as methods for ionizing target compound components in a sample using mass spectrometry. Ionization can be roughly classified into a method of ionization in a vacuum atmosphere and a method of ionization in an atmosphere of approximately atmospheric pressure, and the atmosphere of approximately atmospheric pressure may be collectively referred to as atmospheric pressure ionization or ambient ionization. [0003] In mass spectrometers using atmospheric pressure ionization, means are needed for efficiently transferring ions from the ion source into the high vacuum chamber with the mass spectrometer. For this purpose a vacuum system is used which comprises several vacuum stages in which the pressure is gradually reduced. [0004] However, to efficientl...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01J49/06H01J49/10H01J49/26
CPCH01J49/062H01J49/063H01J49/10H01J49/26H01J49/065H01J49/161H01J49/24
Inventor金泰晚朴翰浯
OwnerBIONEER