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Dual ion sources matrix ion trap mass spectrograph

An ion trap mass spectrometer and a rectangular ion trap technology, applied in the field of scientific instruments, can solve problems such as troublesome and impossible two ion sources to work at the same time, and achieve the effect of expanding the application field, maximizing the utilization rate, and improving the cost performance.

Inactive Publication Date: 2007-08-15
JILIN UNIV
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  • Abstract
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Problems solved by technology

Existing multi-ion source mass spectrometers only have one ion source working at the same time. When using different ion sources, the ion source that has been installed and debugged must be replaced. Generally, manual or mechanical switching is used to replace the ion source, which is troublesome. It is also impossible to realize two ion sources working at the same time to study the reaction mechanism of molecular ions

Method used

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  • Dual ion sources matrix ion trap mass spectrograph
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Examples

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Embodiment 1

[0021] Example 1 Rectangular ion trap mass spectrometer with external dual ion sources

[0022] The schematic diagram of the dual-source rectangular ion trap is shown in Fig. 4 .

[0023] The electric field of the rectangular ion trap is a cuboid area surrounded by three pairs of electrodes, that is, x electrode 1, y electrode 2 and z electrode 3. The distance between the x-electrode 1 and the y-electrode 2 is designed according to a certain ratio, and the commonly used ratio is 5:4. The distance between the two z-electrodes 3 is generally several times the distance between the two x-electrodes. There is a certain insulation distance between any electrode plate, depending on the size of the RIT. The electrodes of the ion trap are finely machined from non-magnetic stainless steel, and PEEK is used as the fixed support material. There is a rectangular hole 4 in the center of the x-electrode 1, through which ions are scanned out to reach the detector.

[0024] In this embodime...

Embodiment 2

[0027] Example 2 Rectangular Ion Trap Mass Spectrometer with Dual Ion Sources Using Internal Ionization Mode

[0028] Fig. 5 is a schematic diagram of one of the ion sources being an electron bombardment ion source (EI) for internal ionization, and the other ion source is one of the ion sources described in Example 1, which is not shown in Fig. 5 . In Fig. 5, 6 is a detector, and 9 is a filament of an ion source for internal electron bombardment.

[0029] If the internal ionization mode is adopted, the EI source structure of the internal ionization is the same as that of the prior art, and the rectangular hole 4 on the x electrode 1 is used for the entrance of electrons emitted by the internal ionization filament 9; Have a small circular hole 5 to enter the ion trap.

[0030] In this embodiment, the electric field is 10×8×43mm 3 (x 0 ,y 0 ,z 0 ) The ion trap in the cuboid area, the insulation distance between the x, y and z electrode plates is the same as in embodiment 1;...

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Abstract

The bi-ionic-source rectangular ion trap mass spectrometer comprises: an electric field of rectangular ion trap enclosed by x electrode (1), y electrode (2) and z electrode (3), a rectangular hole on x electrode, a circular hole (5) on z electrode center to inject ion, two ion sources (8) on end covers of mass analyzer; or when bombarding ion source (9) by inner-ionized electron, injecting electron and ion through hole (4) and (5) respectively. This invention increases device capability-price ratio, and benefit to deep research on molecular ion reaction mechanism.

Description

technical field [0001] The invention belongs to the technical field of scientific instruments, and relates to a mass spectrometer and an application method. technical background [0002] Mass spectrometry is one of the most important methods in the field of analysis. With the development of the times, mass spectrometry not only plays an important role in conventional chemical analysis, but also gradually becomes an One of the main methods in hot fields. Subsequently, mass spectrometry instruments have also been developed rapidly, and various new mass spectrometry instruments and new technologies are constantly emerging. While common mass spectrometers such as quadrupole, time-of-flight, and Paul ion trap are constantly being improved, mass spectrometers using new mass analyzers such as rectangular ion traps, cylindrical ion traps, and Orbitrap have also made great progress. [0003] A prior art close to the present invention is the Rectangular Ion Trap (RIT) mass spectrome...

Claims

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Application Information

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IPC IPC(8): H01J49/02H01J49/10H01J49/28
Inventor 金钦汉姜杰周建光费强金伟李明许晓宇
Owner JILIN UNIV
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