Ion-trap mass spectrometry system containing high-order field components

A technology of mass spectrometry system and ion trap, which is applied in the direction of mass spectrometer, ion source/gun, particle separator tube parts, etc., can solve the problems of hyperbolic electrode precision processing and assembly difficulties, and achieve easy processing and assembly, and improve Analyzing performance and analyzing the effects of performance optimization

Active Publication Date: 2016-05-25
WUHAN FRASERGEN CO LTD
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Problems solved by technology

The ideal pure quadrupole electric field is realized by hyperbolic electrode systems, such as three-dimensional ion traps and hyperbolic quadrupole rods, but the precision machining and assembly of hyperbolic electrodes is quite difficult

Method used

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  • Ion-trap mass spectrometry system containing high-order field components
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  • Ion-trap mass spectrometry system containing high-order field components

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Embodiment 1

[0037] The driving voltage of the ion trap is mainly a radiofrequency voltage (radiofrequency, referred to as RF). Currently, there are two types of RF voltages for driving ion traps, one is traditional sine wave driving, and the other is digital square wave driving. The method proposed by the present invention is mainly applied in the digital square wave driving mode. The following takes digital square wave as an example to illustrate.

[0038] In an ion trap driven by a digital square wave, the amplitude of the square wave used to trap ions is generally several hundred volts, and is a certain value. When the ion trap is working, by scanning the frequency of the digital square wave, the dipole resonance excitation signal is superimposed on the digital square wave during the scanning phase. Resonance pops. The dipole excitation square wave used for ion resonance excitation is generated and controlled in the same way as the bound square wave, but its amplitude is lower, gene...

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Abstract

The invention belongs to the technical field of mass spectrometry analysis and test, in particular to an ion-trap mass spectrometry system containing high-order field components. The ion-trap mass spectrometry system comprises four linear rod electrodes which are in a circular section structure; a quadrupole electrode system can generate the high-order field components which take a quadrupole field A2 as a main component and comprise a partial octupole field A4, a twelve-pole field A6, a hexadecapole field A8, a twenty-pole field A10 and the like by adjusting the size proportional relation of circular arc radiuses of the circular arc electrodes. After proper high-order field components are introduced into the quadrupole ion-trap mass spectrometry system, the mass resolution ratio of an ion-trap, the ion mass spectrometry signal strength and the tandem mass spectrometry analysis efficiency can be effectively improved; meanwhile, the low mass cut-off value of the ion-trap can be effectively improved; the main difficulty in low mass number detection of a traditional ion trap mass spectrometer in the tandem mass spectrometry process is overcome; and the ion-trap mass spectrometry system containing the high-order field components provided by the invention has the advantages of being simple in structure, easy to process, unique in performance and the like.

Description

technical field [0001] The invention belongs to the technical field of mass analysis, in particular to an ion trap mass spectrometry system. Background technique [0002] Mass spectrometer is currently one of the most important analytical scientific instruments in the field of analysis and testing. It is widely used in modern scientific research and production activities. It plays an indispensable role in the field of trace substance detection, and has become an indispensable analytical tool in the development of modern science and technology and in daily life. [0003] Ion trap mass spectrometer is one of many mass spectrometers, which has the advantages of simple structure, small volume, and easy processing. The core key component of the ion trap mass spectrometer is the ion trap mass analyzer. The ion trap mass analyzer can realize the functions of ion storage and tandem mass spectrometry in a single mass analyzer at the same time, and can obtain more measured sample com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/10H01J49/42
CPCH01J49/10H01J49/42
Inventor 徐福兴党乾坤丁航宇汪源源周鸣飞丁传凡
Owner WUHAN FRASERGEN CO LTD
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