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Asymmetric triangular electrode structure ion trap

An electrode structure and triangular technology, which is applied in the field of mass spectrometers, can solve the problems of reduced mass resolution of rectangular ion traps, achieve the effects of improving mass resolution and sensitivity, improving mass resolution, and improving analysis performance

Pending Publication Date: 2019-08-23
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the change of the electrode shape of the rectangular ion trap, too many high-order field components are introduced into the internal electric field of the ion trap, resulting in a decrease in the mass resolution of the rectangular ion trap.

Method used

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  • Asymmetric triangular electrode structure ion trap
  • Asymmetric triangular electrode structure ion trap
  • Asymmetric triangular electrode structure ion trap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment one: if Figure 1-3 As shown, an ion trap with an asymmetric triangular electrode structure includes four triangular columnar electrodes 11, 12, 13, 14 and at least two end cap electrodes 15, wherein the electrode angle of one triangular columnar electrode 14 is different from that of the other three triangular columnar electrodes. The electrodes 11, 12, 13 have different electrode angles, and the four triangular columnar electrodes 11, 12, 13, 14 and the end cap electrode 15 form a three-dimensional structure similar to a cuboid, and the two oppositely arranged triangular columnar electrodes are parallel to each other and Adjacent triangular columnar electrodes are separated by an insulating material to maintain insulation between the electrodes; the electrode angles of the triangular columnar electrodes 11, 12, and 13 with equal angles are α, and the electrode angles of the triangular columnar electrodes 14 with different angles are 12° °±Δα, 10°≥Δα>0°; the...

Embodiment 2

[0030] Embodiment two: if Figure 1-3 As shown, an ion trap with an asymmetric triangular electrode structure includes four triangular columnar electrodes 11, 12, 13, 14 and at least two end cap electrodes 15, wherein the electrode angle 14 of one triangular columnar electrode is different from that of the other three triangular columnar electrodes. The electrodes 11, 12, 13 have different electrode angles, and the four triangular columnar electrodes 11, 12, 13, 14 and the end cover electrode 15 form a three-dimensional structure similar to a cuboid, and the two oppositely arranged triangular columnar electrodes are parallel to each other. Adjacent triangular columnar electrodes are separated by an insulating material to keep the insulation between the electrodes; the electrode angles of the triangular columnar electrodes 11, 12, and 13 with equal angles are 140°, and the electrode angles of the triangular columnar electrodes 14 with different angles are 140°±Δα, 10°≥Δα>0°; th...

Embodiment 3

[0031] Embodiment three: as Figure 1-3As shown, an ion trap with an asymmetric triangular electrode structure includes four triangular columnar electrodes 11, 12, 13, 14 and two end cap electrodes 15, wherein the electrode angle of one triangular columnar electrode 14 is different from that of the other three triangular columnar electrodes The electrode angles of 11, 12, and 13 are different. The four triangular columnar electrodes 11, 12, 13, 14 and the end cap electrode 15 form a three-dimensional structure similar to a cuboid. The two oppositely arranged triangular columnar electrodes are parallel to each other and adjacent to each other. The triangular columnar electrodes are separated by an insulating material to maintain the insulation between the electrodes; the electrode angles of the triangular columnar electrodes 11, 12, and 13 with equal angles are α, and the electrode angles of the triangular columnar electrodes 14 with different angles are 160° ±Δα, 10°≥Δα>0°; th...

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Abstract

The invention discloses an asymmetric triangular electrode structure ion trap. The ion trap comprises three triangular columnar electrodes with equal angles, a triangular columnar electrode with a different angle, and at least two end cover electrodes, wherein the two oppositely arranged triangular columnar electrodes are parallel to each other, and the electrode angles of the triangular columnarelectrodes with the same angle are alpha, and the electrode angles of the triangular columnar electrodes with different angles are alpha+ / -delta(alpha), wherein 10 degrees >= delta(alpha) > 0 degree;an ion lead-out groove is formed at the center of each triangular columnar electrode, and the triangular columnar electrodes with different angles are arranged in an ion emitting direction. The ion trap has the advantages that a quadrupole electric field is mainly generated in the ion trap, and a certain amount of component potential distribution of a six-pole field and an eight-pole field is introduced, so that the mass resolution of the ion trap is improved by at least two times, and the analysis performance of the method is improved; the working circuit of the ion trap does not need to be changed; the ion trap is simple in structure, is easy to machine and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of a mass spectrometer, in particular to an ion trap with an asymmetrical triangular electrode structure. Background technique [0002] Mass spectrometer is a modern analytical instrument with high sensitivity and high specificity, which has been widely used in biology, food safety, pharmaceutical industry, environmental monitoring and homeland security and other fields. It has excellent ability of qualitative and quantitative analysis of chemical substances. It is mainly composed of ion source, ion transmission system, mass analyzer, ion detection and data acquisition control system. The mass analyzer is one of the core components of the mass spectrometer. [0003] In different mass analyzers, ion traps have the advantages of small size, low vacuum requirements, low assembly requirements and tandem mass spectrometry capabilities, making ion traps widely used in physics, analytical chemistry, medicine, env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/42
CPCH01J49/4225H01J49/4255
Inventor 丁传凡陈新徐福兴古连城唐科奇方向
Owner NINGBO UNIV
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