CN220106428U - Positive and negative ion switching device of mass spectrometer - Google Patents
Positive and negative ion switching device of mass spectrometer Download PDFInfo
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- CN220106428U CN220106428U CN202320260078.1U CN202320260078U CN220106428U CN 220106428 U CN220106428 U CN 220106428U CN 202320260078 U CN202320260078 U CN 202320260078U CN 220106428 U CN220106428 U CN 220106428U
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- 239000002184 metal Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 abstract description 88
- 230000001133 acceleration Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000005040 ion trap Methods 0.000 description 3
- 238000001819 mass spectrum Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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Abstract
The utility model discloses a positive and negative ion switching device of a mass spectrometer, and relates to the technical field of mass spectrometers. The device comprises a shell, wherein one end inside the shell is fixedly connected with a sample bin, and both ends of the sample bin are respectively provided with a positive ion source and a negative ion source. According to the utility model, through the arrangement of the closing device, the power supply positive and negative electrode switching device, the first photographic film and the second photographic film, one ion source is closed by the closing device, the other ion source is opened, the ion source is opened, positive ions or negative ions which are required to be selected by the user are definitely, the polarities of the two metal plates are changed sequentially through the power supply positive and negative electrode switching device, acceleration is realized, ions can appear on the photographic film after passing through the speed selector and the deflection magnetic field generating device, and through the structure, the switching of the positive ions and the negative ions can be realized, so that the types of detectable analytes are increased, meanwhile, the structure is simple, the manufacturing is convenient, and the production cost can be reduced.
Description
Technical Field
The utility model relates to the technical field of mass spectrometers, in particular to a positive and negative ion switching device of a mass spectrometer.
Background
Mass spectrometers, also called mass spectrometers, are instruments for separating and detecting different isotopes, i.e. a class of instruments for separating and detecting the composition of a substance according to the mass difference of atoms, molecules or fragments of a substance according to the principle that charged particles are able to deflect in an electromagnetic field, ions being charged particles formed by the loss or acquisition of one or more electrons of an atom or group of atoms.
An ion trap mass spectrometer with fast switching of positive and negative ion detection modes as disclosed in application number 201811411779.0. The mass spectrometer comprises a reagent auxiliary photoionization ion source, a discontinuous atmospheric pressure interface, two direct-current high-voltage power supply groups, a vacuum cavity, a radio-frequency high-voltage power supply and an analog-to-digital conversion module. The ion trap mass spectrometer with the fast switching positive and negative ion detection modes can greatly widen the detection range of ion trap mass spectrum, simplify mass spectrum detection flow, reduce mass spectrum detection cost and have wide prospect in the field of on-site fast analysis and detection
When the structure of the mass spectrometer realizes the rapid switching of the positive and negative ion detection modes, two direct current high-voltage power supplies are arranged and provided with switches matched with the direct current high-voltage power supplies, and the mass spectrometer has higher production cost due to the complex structure of the mass spectrometer, so that the positive and negative ion switching device of the mass spectrometer is provided.
Disclosure of Invention
The utility model aims to provide a positive and negative ion switching device of a mass spectrometer, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a positive and negative ion auto-change over device of mass spectrometer, includes the shell, the inside one end fixedly connected with sample storehouse of shell, positive ion source and negative ion source are installed respectively at the both ends of sample storehouse, install closing device between sample storehouse and the positive ion source, install closing device between sample storehouse and the negative ion source, accelerating device is installed to the one end of sample storehouse, accelerating device electric connection has positive and negative auto-change over device of power, speed selector is installed to accelerating device's one end, deflection magnetic field generating device is installed to speed selector's one end, first photographic film and second photographic film are installed respectively to the both sides of deflection magnetic field generating device one end.
Preferably, the accelerating device comprises a through pipe, two metal plates are respectively arranged on two sides of the inner wall of the through pipe, one side of each metal plate is provided with a hole, and the two metal plates are respectively electrically connected with the power supply positive and negative electrode switching device.
Preferably, the closing device comprises an electric push rod, the bottom end of the electric push rod is fixed with the top end of the inside of the shell, and the telescopic end of the electric push rod is fixedly connected with a moving block.
Preferably, one side of the moving block is contacted with one side of the positive ion source, the other side of the moving block is contacted with one side of the sample bin, a round hole is formed in one side of the moving block, and a sealing cover is arranged at one end of the sample bin.
Preferably, the closure means at the negative ion source is identical in construction to the closure means at the positive ion source.
Preferably, the power supply positive and negative electrode switching device is electrically connected with a power supply, and a vacuum pump is arranged on the side wall of the through pipe.
Compared with the prior art, the utility model has the beneficial effects that:
the positive and negative ion switching device of the mass spectrometer is characterized in that one ion source is closed by the closing device, the positive and negative electrode switching device of the power supply, the first photographic negative film and the second photographic negative film are arranged, the other ion source is opened, the positive ions or the negative ions which are required to be selected by the closing device are definitely opened, the polarities of the two metal plates are changed sequentially through the positive and negative electrode switching device of the power supply, acceleration is realized, after passing through the speed selector and the deflection magnetic field generating device, ions can appear on the photographic negative film, and through the structure, the switching of the positive ions and the negative ions can be realized, so that the types of detectable analytes are increased.
According to the positive and negative ion switching device of the mass spectrometer, the polarities of the two metal plates are changed through the arrangement of the positive and negative electrode switching device of the power supply, so that the voltage between the two metal plates is changed, acceleration of positive ions or negative ions is achieved, and the mass spectrometer can achieve mutual switching between the positive ions and the negative ions.
Drawings
FIG. 1 is an isometric view of the present utility model;
FIG. 2 is a cross-sectional view of the accelerator apparatus of the present utility model;
FIG. 3 is an isometric view of a closure device of the present utility model;
fig. 4 is a partial cross-sectional view of the present utility model.
In the figure: 1. a sample bin; 2. an acceleration device; 201. a through pipe; 202. a metal plate; 3. a power supply anode-cathode switching device; 4. a speed selector; 5. deflection magnetic field generating means; 6. a first photographic negative; 7. a second photographic negative; 8. a source of positive ions; 9. a source of negative ions; 10. a closure device; 101. an electric push rod; 102. a moving block; 11. a housing.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.
As shown in fig. 1 to 4, the present utility model provides a technical solution: the utility model provides a positive and negative ion auto-change over device of mass spectrometer, including shell 11, the inside one end fixedly connected with sample storehouse 1 of shell 11, positive ion source 8 and negative ion source 9 are installed respectively at the both ends of sample storehouse 1, install closing device 10 between sample storehouse 1 and the positive ion source 8, install closing device 10 between sample storehouse 1 and the negative ion source 9, accelerating device 2 is installed to the one end of sample storehouse 1, accelerating device 2 electric connection has positive and negative auto-change over device 3 of power, speed selector 4 is installed to the one end of accelerating device 2, deflection magnetic field generating device 5 is installed to the one end of speed selector 4, photographic film 6 and photographic film 7 No. two are installed respectively to the both sides of deflection magnetic field generating device 5 one end.
The accelerating device 2 comprises a through pipe 201, two metal plates 202 are respectively arranged on two sides of the inner wall of the through pipe 201, holes are formed in one side of each metal plate 202, and the two metal plates 202 are respectively and electrically connected with the power supply anode-cathode switching device 3.
The closing device 10 comprises an electric push rod 101, wherein the bottom end of the electric push rod 101 is fixed with the top end of the inside of the shell 11, and the telescopic end of the electric push rod 101 is fixedly connected with a moving block 102.
One side of the moving block 102 is contacted with one side of the positive ion source 8, the other side of the moving block 102 is contacted with one side of the sample bin 1, a round hole is formed in one side of the moving block 102, and a sealing cover is arranged at one end of the sample bin 1.
The closing means 10 at the negative ion source 9 is identical in structure to the closing means 10 at the positive ion source 8.
The power source anode-cathode switching device 3 is electrically connected with a power source, and a vacuum pump is installed on the side wall of the through pipe 201.
Placing a sample in the sample bin 1, and dividing the sample into a positive ion source 8, a negative ion source 9 and the like according to the generated ion types, so that the positive ion source 8 and the negative ion source 9 are arranged, when one ion source is used, a closing device 10 of the other ion source is used for closing a channel between the ion source and the sample bin 1, positive ions are prevented from entering the negative ion source 9, and vice versa, the electric push rod 101 stretches and contracts, the moving block 102 moves, and the channel between the ion source and the sample bin 1 is opened or closed; the accelerating device 2 accelerates ions, and the mass spectrometer can accelerate positive ions and negative ions, so that the power supply positive and negative electrode switching devices 3 are arranged on two sides of an accelerating electric field, and the polarities of the two metal plates 202 are changed through the power supply positive and negative electrode switching devices 3, so that the positive ions and the negative ions can be accelerated respectively; the electric field intensity and the magnetic induction intensity in the speed selector 4 are mutually perpendicular, the deflection situation is different after the charged particles with different horizontal speeds are injected, the particles with specific speed can be selected by the speed selector 4, and the speed selector 4 only selects the speed and is irrelevant to the positive and negative of the charge, so that the speed selector 4 can be used for both positive ions and negative ions, the charged particles can pass through the speed selector 4 at a uniform speed (or along a straight line) with only determined speed (including the size and the direction), otherwise, the charged particles deflect, the positive ions or the negative ions enter a deflection magnetic field, the deflection directions of the positive ions and the negative ions are different under the condition of the internal magnetic field direction of the deflection magnetic field generating device 5, a first photographic film 6 and a second photographic film 7 are arranged, the positive ions and the negative ions pass through different photographic films respectively, the positive ions or negative ions received by the first photographic film 6 are related to the magnetic field direction in the deflection magnetic field generating device 5, one of the ion sources is closed by the closing device 10, the power supply positive and negative electrode switching device 3, the first photographic film 6 and the second photographic film 7, the other ion source is opened by the closing device 10, the positive ions or the negative ions which need to be selected by the user are definitely opened, the polarities of the two metal plates 202 are changed by the power supply positive and negative electrode switching device 3 in sequence, the acceleration is realized, the ions can appear in the photographic film after passing through the speed selector 4 and the deflection magnetic field generating device 5, the switching of the positive ions and the negative ions can be realized through the structure, so that the detectable analyte species is increased, meanwhile, the structure is simple, the manufacturing is convenient, the production cost can be reduced, by setting the power supply positive and negative electrode switching device 3, the polarities of the two metal plates 202 are changed, so that the voltage between the two metal plates 202 is changed, the acceleration of positive ions or negative ions is realized, and the mass spectrometer can realize the mutual switching between positive ions and negative ions.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Positive and negative ion switching device of mass spectrometer, including shell (11), its characterized in that: the utility model discloses a negative ion source, including shell (11), sample storehouse (1), speed selector (4) are installed to the one end of shell (11) inside one end fixedly connected with sample storehouse (1), positive ion source (8) and negative ion source (9) are installed respectively at the both ends of sample storehouse (1), install closing device (10) between sample storehouse (1) and positive ion source (8), install closing device (10) between sample storehouse (1) and negative ion source (9), accelerating device (2) are installed to the one end of sample storehouse (1), accelerating device (2) electric connection has positive negative pole auto-change over device (3) of power, speed selector (4) are installed to the one end of accelerating device (2), deflection magnetic field generation device (5) are installed to the one end of speed selector (4), photographic film (6) and photographic film (7) No. two are installed respectively to the both sides of deflection magnetic field generation device (5) one end.
2. The positive and negative ion switching device of a mass spectrometer according to claim 1, wherein: the accelerating device (2) comprises a through pipe (201), two metal plates (202) are respectively arranged on two sides of the inner wall of the through pipe (201), holes are formed in one side of each metal plate (202), and the two metal plates (202) are respectively electrically connected with the power supply anode-cathode switching device (3).
3. The positive and negative ion switching device of a mass spectrometer according to claim 1, wherein: the closing device (10) comprises an electric push rod (101), wherein the bottom end of the electric push rod (101) is fixed with the top end of the inside of the shell (11), and the telescopic end of the electric push rod (101) is fixedly connected with a moving block (102).
4. A positive and negative ion switching device for a mass spectrometer according to claim 3, wherein: one side of the moving block (102) is contacted with one side of the positive ion source (8), the other side of the moving block (102) is contacted with one side of the sample bin (1), a round hole is formed in one side of the moving block (102), and a sealing cover is arranged at one end of the sample bin (1).
5. The positive and negative ion switching device of a mass spectrometer according to claim 1, wherein: the closing device (10) at the negative ion source (9) and the closing device (10) at the positive ion source (8) have the same structure.
6. A positive and negative ion switching device of a mass spectrometer according to claim 2, wherein: the power supply anode-cathode switching device (3) is electrically connected with a power supply, and a vacuum pump is arranged on the side wall of the through pipe (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320260078.1U CN220106428U (en) | 2023-02-20 | 2023-02-20 | Positive and negative ion switching device of mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320260078.1U CN220106428U (en) | 2023-02-20 | 2023-02-20 | Positive and negative ion switching device of mass spectrometer |
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| Publication Number | Publication Date |
|---|---|
| CN220106428U true CN220106428U (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320260078.1U Active CN220106428U (en) | 2023-02-20 | 2023-02-20 | Positive and negative ion switching device of mass spectrometer |
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| Country | Link |
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| CN (1) | CN220106428U (en) |
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- 2023-02-20 CN CN202320260078.1U patent/CN220106428U/en active Active
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