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Multi-section quadrupole rod electrode system and series connection method thereof

An electrode system and quadrupole technology, applied in the direction of circuits, discharge tubes, electrical components, etc., can solve the problems of reducing ion transmission efficiency and ion loss, and achieve the effects of improving transmission efficiency, preventing ion loss, and avoiding fringe field effects

Pending Publication Date: 2019-12-13
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing tandem mass spectrometer transmits ions, due to the influence of the fringe field effect, some ions will deviate from the axial trajectory and cause losses, reducing the transmission efficiency of ions

Method used

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  • Multi-section quadrupole rod electrode system and series connection method thereof
  • Multi-section quadrupole rod electrode system and series connection method thereof
  • Multi-section quadrupole rod electrode system and series connection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] As shown in the figure, a multi-section quadrupole electrode system for improving ion transmission efficiency in quadrupole mass spectrometry according to the present invention includes at least two sets of adjacently placed quadrupole electrode systems: the first quadrupole electrode system 1 and the second quadrupole electrode system 2, the first quadrupole electrode system 1 is composed of four identical first electrodes 11, and the second quadrupole electrode system 2 is composed of four identical second electrodes 21 Each first electrode 11 of the first quadrupole electrode system 1 is arranged coaxially with each second electrode 21 of the adjacent corresponding second quadrupole electrode system 2 .

[0028] One end adjacent to the corresponding second electrode 21 on each first electrode 11 is provided with a first extension 12, and one end adjacent to the corresponding first electrode 11 on each second electrode 21 is provided with a shape and The first extensi...

Embodiment 2

[0034] A multi-stage quadrupole electrode system for improving ion transmission efficiency in quadrupole mass spectrometry, the rest of the structure is the same as that of Embodiment 1, the difference is that in this embodiment, such as Figure 5 Each first extension 12 is shown as being beveled, and each second extension 22 is beveled. The end surface of the first extension portion 12 is parallel to the end surface of the adjacent second extension portion 22 with a gap d between them.

Embodiment 3

[0036] A series method for a multi-stage quadrupole electrode system, comprising the following steps:

[0037] 1) Among the two or more quadrupole electrode systems, arbitrarily select two groups placed adjacently before and after as the first quadrupole electrode group and the second quadrupole electrode group, and each of the first quadrupole electrode groups A first extension is provided at the end of each electrode, and a second extension with a matching shape is provided at the front end of each electrode on the second quadrupole electrode rod group;

[0038] 2) The first quadrupole electrode rod group and the second quadrupole electrode rod group are connected in series, and each first extension part overlaps with the corresponding second extension part and keeps the positions symmetrical. A gap is left between the parts or an insulating material is filled between the first extension part and the second extension part.

[0039] In three or more groups of quadrupole rod ...

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Abstract

The invention discloses a series connection method and device for two or more groups of quadrupole rod electrode systems. The device comprises at least two adjacent quadrupole electrode rod groups, namely a first electrode rod group and a second electrode rod group, and is characterized in that the first electrode rod group is composed of four identical electrodes, and the second electrode rod group is composed of four identical electrodes; the first electrodes and the adjacent corresponding second electrodes are coaxially arranged; a first extension part and a second extension part which arepartially overlapped are formed between the first electrode and the corresponding second electrode; and a gap is formed between the first extension part and the second extension part. The system and the method disclosed in the invention have the advantages that the fringe field effects generated by the arrangement of a planar electrode between the two groups of quadrupole rod electrode systems canbe avoided, the ion loss of the two quadrupole rod electrode systems in the transmission process is prevented, and the ion transmission efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry instruments, in particular to a multi-section quadrupole electrode system and a series connection method for improving ion transmission efficiency in quadrupole mass spectrometry. Background technique [0002] Mass spectrometer is widely used in material analysis and component identification. It has the advantages of fast and accurate, and can perform high-sensitivity analysis of chemical components. Its basic working principle is: firstly ionize the detected substance into ions, separate different ions according to the mass-to-charge ratio (m / z) by electric field or magnetic field, and then detect these separated ions by ion detector, thus Get a mass spectrum. Through the analysis of the mass spectrum, the chemical composition, structure and content of the detected substance can be obtained. In a mass spectrometer, the part that ionizes substances is called the ion source, and the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/42
CPCH01J49/4225H01J49/068H01J49/004
Inventor 闫迎华高文清唐科奇胡军丁传凡徐铁峰
Owner NINGBO UNIV