Collision cell for mass spectrum analyzer and mass spectrum analyzer

Abstract

The utility model relates to the technical field of mass spectrum analysis, and discloses a collision cell for a mass spectrum analyzer and the mass spectrum analyzer, the collision cell comprises a sleeve, an electrode stem, a binding post and a sealing assembly, the interior of the sleeve is provided with a cavity which is through along the axial direction, and the side wall of the sleeve is provided with a first through hole which is communicated with the cavity; the electrode stem is arranged in the cavity in the axial direction of the sleeve, a channel penetrating in the axial direction is formed in the electrode stem, and a second through hole communicated with the channel is formed in the side wall of the electrode stem; the binding post penetrates through the first through hole and the second through hole, one end of the binding post is connected with the electrode rod, and the other end of the binding post is outwards connected with a feeder line; the sealing assembly sleeves the outer wall of the binding post and blocks the first through hole. The utility model aims to solve the technical problems that the collision pool is poor in sealing performance and cannot meet the actual production requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of mass spectrometry analysis, in particular to a collision cell for a mass spectrometer and a mass spectrometer. Background Art

[0002] A mass spectrometer is a precision multi-functional analytical instrument that separates molecules of different molecular weights according to the different mass-to-charge ratios of ions, thereby determining the molecular weight and conducting component and structure analysis.

[0003] A collision cell, also known as a collision reaction cell, is an important component in the structure of a mass spectrometer. Daughter ions are generated through collision reactions in the collision cell, and then qualitative and quantitative information of the parent ions is obtained. In the related art, due to the poor sealing performance of the collision cell, it cannot meet the requirements of actual production. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a collision cell for a mass spectrometer to solve the technical problem that the sealing performance of the collision cell is poor and it cannot meet the requirements of actual production.

[0005] To achieve the above purpose, the utility model provides a collision cell for a mass spectrometer, which includes:

[0006] A sleeve, the interior of the sleeve has an axially penetrating cavity, and a first through hole communicating with the cavity is provided on the side wall of the sleeve;

[0007] An electrode rod, the electrode rod is arranged in the cavity along the axis of the sleeve, the interior of the electrode rod has an axially penetrating channel, and a second through hole communicating with the channel is provided on the side wall of the electrode rod;

[0008] A terminal, the terminal passes through the first through hole and the second through hole, one end of the terminal is connected to the electrode rod, and the other end of the terminal is externally connected to a feeder line;

[0009] A sealing assembly, the sealing assembly is sleeved on the outer wall of the terminal and blocks the first through hole.

[0010] Optionally, the sealing assembly includes a sealing insulating sleeve and a first sealing ring. The sealing insulating sleeve is sleeved on the outer wall of the terminal, and the first sealing ring is sleeved on the outer wall of the sealing insulating sleeve and abuts against the inner wall of the first through hole to block the first through hole.

[0011] Optionally, a first annular groove surrounding the center of the sealing insulating sleeve is provided on the outer wall of the sealing insulating sleeve, and the first sealing ring is embedded in the first annular groove.

[0012] Optionally, the sealing assembly further includes a second sealing ring, which is sleeved on the outer wall of the terminal post and abuts against the inner wall of the sealing insulating sleeve.

[0013] Optionally, the inner wall of the sealing insulating sleeve is provided with a second annular groove surrounding the center of the sealing insulating sleeve, and the second sealing ring is embedded in the second annular groove.

[0014] Optionally, the terminal post includes a first cylinder, a second cylinder, and a third cylinder. The first cylinder is connected to one end of the second cylinder and passes through the second through hole. The second cylinder passes through the first through hole. The third cylinder is connected to the end of the second cylinder away from the first cylinder.

[0015] Wherein, the diameter of the third cylinder is larger than that of the second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, and the sealing insulating sleeve is sleeved on the outer wall of the second cylinder.

[0016] Optionally, the side wall of the sleeve is provided with a plurality of the first through holes, and the plurality of the first through holes are arranged at intervals along the circumferential direction of the sleeve.

[0017] The collision cell includes a plurality of electrode rods. The plurality of electrode rods are arranged at intervals along the circumferential direction of the sleeve in the cavity, and the second through holes of the respective electrode rods correspond to the respective first through holes one by one.

[0018] Optionally, the two ends of the sleeve are respectively an inlet end and an outlet end, and electronic lenses are provided at both the inlet end and the outlet end of the sleeve.

[0019] The collision cell includes a connecting member and a fixing member. The electronic lens is connected to the sleeve through the connecting member. The fixing member is sleeved inside the connecting member, and the plurality of electrode rods are fixed to the connecting member through the fixing member.

[0020] Optionally, the collision cell includes a third sealing ring, which is sleeved on the outer wall of the fixing member and abuts against the inner wall of the connecting member.

[0021] In a second aspect, the present invention provides a mass spectrometer, which includes the collision cell.

[0022] The present invention provides a collision cell for a mass spectrometer, and its beneficial effects are as follows:

[0023] The collision cell of the present utility model includes a sleeve, an electrode rod, a terminal and a sealing assembly. In order to ensure the sealing performance of the collision cell, a sealing assembly is sleeved on the outer wall of the terminal. The sealing assembly can be made of elastic materials such as rubber and silica gel and has sealing property. The inner diameter of the sealing assembly is slightly smaller than the outer diameter of the terminal. It is closely attached to the terminal by an interference fit and seals the first through hole of the sleeve, improving the sealing performance of the collision cell and preventing gas leakage or external interference. The collision cell of the present utility model adopts the above structure to achieve a reliable connection between the electrode rod and the external feeder line, while ensuring the good sealing performance of the collision cell. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Structural schematic diagram of the collision cell provided by the embodiment of the present utility model;

[0026] Figure 2 Exploded view of the collision cell provided by the embodiment of the present utility model;

[0027] Figure 3 Another exploded view of the collision cell provided by the embodiment of the present utility model;

[0028] Figure 4 Assembly schematic diagram of the terminal and the sealing assembly provided by the embodiment of the present utility model;

[0029] Figure 5 For Figure 4 exploded view;

[0030] Figure 6 For Figure 4 another exploded view.

[0031] The marks in the figure are as follows:

[0032] 10, sleeve; 11, first through hole; 20, electrode rod; 21, second through hole; 30, terminal; 31, first cylinder; 32, second cylinder; 33, third cylinder; 40, sealing assembly; 41, first sealing ring; 42, sealing insulating sleeve; 43, first annular groove; 44, second sealing ring; 45, second annular groove; 50, electron lens; 60, connecting piece; 70, fixing piece; 80, third sealing ring. Detailed Embodiments

[0033] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. in the present utility model is based on the positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0035] In the description of the present utility model, it should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0036] In the related art, after the ions in the collision cell collide with gas molecules, specific signals are generated. The signals need to be transmitted through a feeder line to the detection system of the mass spectrometer for analysis and processing. Therefore, usually a feeder line is externally connected to the body of the collision cell to achieve signal transmission, but the externally connected feeder line may cause the sealing performance of the collision cell to deteriorate.

[0037] Based on this, as Figures 1 to 3 shown, an embodiment of the present utility model provides a collision cell for a mass spectrometer. The collision cell includes a sleeve 10, an electrode rod 20, a terminal 30, and a sealing assembly 40. The inside of the sleeve 10 has an axially penetrating cavity, and the side wall of the sleeve 10 is provided with a first through hole 11 communicating with the cavity; the electrode rod 20 is arranged in the cavity along the axis of the sleeve 10, the inside of the electrode rod 20 has an axially penetrating channel, and the side wall of the electrode rod 20 is provided with a second through hole 21 communicating with the channel; the terminal 30 passes through the first through hole 11 and the second through hole 21, one end of the terminal 30 is connected to the electrode rod 20, and the other end of the terminal 30 is externally connected to a feeder line (not shown in the drawings); the sealing assembly 40 is sleeved on the outer wall of the terminal 30 and seals the first through hole 11.

[0038] In this embodiment, the sleeve 10 is the main part of the collision cell, and its inside has an axially penetrating cavity for accommodating components such as the electrode rod 20. The side wall of the sleeve 10 is provided with a first through hole 11 communicating with the cavity, and the first through hole 11 is used to pass through the terminal 30 to realize the connection between the electrode rod 20 and the external feeder line.

[0039] Among them, the electrode rod 20 is axially arranged in the cavity along the sleeve 10, and is used to generate an electric field or a magnetic field in the collision cell to guide and collide with ions. The inside of the electrode rod 20 has an axially penetrating channel for transmitting gas or other media. A second through hole 21 communicating with the channel is provided on the side wall of the electrode rod 20, and the second through hole 21 corresponds to the first through hole 11 on the sleeve 10 for installing the terminal 30.

[0040] Based on this, the terminal 30 passes through the first through hole 11 of the sleeve 10 and the second through hole 21 of the electrode rod 20, and functions to connect the electrode rod 20 with the external feeder. One end of the terminal 30 is fixedly connected to the electrode rod 20 by means of threads, welding or other methods, and the other end extends out of the sleeve 10 to connect the feeder of the mass spectrometer.

[0041] Based on the above technical solution, in order to ensure the sealing performance of the collision cell, a sealing assembly 40 is sleeved on the outer wall of the terminal 30. The sealing assembly 40 can be made of an elastic material such as rubber or silica gel, and has good sealing performance and corrosion resistance. The inner diameter of the sealing assembly 40 is slightly smaller than the outer diameter of the terminal 30, and is tightly fitted on the terminal 30 by an interference fit method, and blocks the first through hole 11 of the sleeve 10, improving the sealing performance of the collision cell and effectively preventing gas leakage or external interference. The collision cell of the present utility model adopts the above structure, realizing a reliable connection between the electrode rod 20 and the external feeder, and at the same time ensuring the good sealing performance of the collision cell.

[0042] In some embodiments, as Figure 3 and Figure 4 shown, the sealing assembly 40 includes a sealing insulating sleeve 42 and a first sealing ring 41. The sealing insulating sleeve 42 is sleeved on the outer wall of the terminal 30, and the first sealing ring 41 is sleeved on the outer wall of the sealing insulating sleeve 42 and abuts against the inner wall of the first through hole 11 to block the first through hole 11.

[0043] Specifically, the sealing insulating sleeve 42 is made of an insulating material such as ceramic, glass or a polymer insulating material, and has good insulation performance. Its inner diameter is slightly larger than the outer diameter of the terminal 30, and is sleeved on the outer wall of the terminal 30 by an interference fit method. The sealing insulating sleeve 42 not only plays an insulating role, but also seals the first through hole 11 of the sleeve 10.

[0044] The first sealing ring 41 is made of an elastic material such as rubber, silica gel or fluororubber, and has good sealing performance. Its inner diameter is slightly smaller than the outer diameter of the sealing insulating sleeve 42, and can be sleeved on the outer wall of the sealing insulating sleeve 42 by elastic deformation and tightly abut against the inner wall of the first through hole 11, further ensuring the sealing performance between the terminal 30 and the sleeve 10 and preventing gas leakage or external interference.

[0045] During the actual installation process, first slip the sealing insulating sleeve 42 over the outer wall of the terminal 30 and ensure it is firmly fixed. Then, slip the first sealing ring 41 over the outer wall of the sealing insulating sleeve 42 and push the terminal 30 into the first through-hole 11 of the sleeve 10 until the first sealing ring 41 tightly abuts against the inner wall of the first through-hole 11. At this time, the sealing assembly 40 seals the gap between the terminal 30 and the sleeve 10, achieving a sealing effect.

[0046] It can be understood that in the design of the sealing assembly 40, if the first sealing ring 41 is directly slipped over the outer wall of the sealing insulating sleeve 42, although this method is simple, after long-term use, the sealing ring may shift or become loose, affecting the sealing effect of the sealing assembly 40.

[0047] Based on this, in some embodiments, as Figure 5 and Figure 6 shown, the outer wall of the sealing insulating sleeve 42 is provided with a first annular groove 43 surrounding the center of the sealing insulating sleeve 42, and the first sealing ring 41 is embedded in the first annular groove 43.

[0048] Specifically, the outer wall of the sealing insulating sleeve 42 is provided with a first annular groove 43 surrounding the center of the sealing insulating sleeve 42. The depth and width of the first annular groove 43 are designed according to the size of the first sealing ring 41, and the first sealing ring 41 can be stably embedded in the first annular groove 43. Among them, the first annular groove 43 can be made by machining or injection molding. During the installation process, first embed the first sealing ring 41 in the first annular groove 43. Due to the limiting effect of the annular groove, the first sealing ring 41 is not easily displaced or loosened during operation.

[0049] In some embodiments, as Figure 6 shown, the sealing assembly 40 further includes a second sealing ring 44. The second sealing ring 44 is slipped over the outer wall of the terminal 30 and abuts against the inner wall of the sealing insulating sleeve 42.

[0050] In order to further enhance the sealing effect of the sealing assembly 40, in this embodiment, on the basis of the sealing assembly 40, a second sealing ring 44 is added to form a double-sealing structure.

[0051] Specifically, the second sealing ring 44 is made of an elastic material, such as rubber, silica gel or fluororubber, etc., and has sealing performance and corrosion resistance. Its inner diameter is slightly smaller than the outer diameter of the terminal 30. It is slipped over the outer wall of the terminal 30 by elastic deformation and tightly abuts against the inner wall of the sealing insulating sleeve 42. In this way, the second sealing ring 44 forms an additional sealing layer between the terminal 30 and the sealing insulating sleeve 42. The second sealing ring 44 and the first sealing ring 41 form a double-sealing structure on the terminal 30, thereby further enhancing the sealing effect of the sealing assembly 40.

[0052] In some embodiments, Figure 6 As shown, the inner wall of the sealing insulating sleeve 42 is provided with a second annular groove 45 surrounding the center of the sealing insulating sleeve 42 , and the second sealing ring 44 is embedded in the second annular groove 45 .

[0053] Specifically, similar to the first annular groove 43, in this embodiment, a second annular groove 45 is provided on the inner wall of the sealing insulating sleeve 42 surrounding the center thereof. The depth, width and shape of the second annular groove 45 are designed according to the specific size and shape of the second sealing ring 44. The cross-sectional shape of the second sealing ring 44 matches the second annular groove 45 so that it can be tightly embedded therein.

[0054] Combined with the design of the first sealing ring 41 and the first annular groove 43, the sealing assembly 40 in this embodiment forms a double sealing structure. The first sealing ring 41 ensures the sealing effect between the sealing insulating sleeve 42 and the first through hole 11 of the sleeve 10, and the second sealing ring 44 further enhances the sealing effect between the terminal 30 and the sealing insulating sleeve 42. This double sealing structure greatly improves the sealing performance of the collision cell and ensures the accuracy and stability of mass spectrometry analysis.

[0055] In some embodiments, Figure 5 and Figure 6 As shown, the terminal 30 includes a first column 31, a second column 32 and a third column 33. The first column 31 is connected to one end of the second column 32 and is passed through the second through hole 21. The second column 32 is passed through the first through hole 11. The third column 33 is connected to one end of the second column 32 away from the first column 31. The diameter of the third column 33 is larger than that of the second column 32. The diameter of the second column 32 is larger than that of the first column 31. The sealing insulating sleeve 42 is sleeved on the outer wall of the second column 32.

[0056] The terminal 30 of this embodiment adopts a three-section design, which includes a first column 31, a second column 32 and a third column 33. The first column 31 is connected to the lower end of the second column 32, and its diameter is small, which is convenient for being inserted into the second through hole 21 of the electrode rod 20. The second column 32 is located between the first column 31 and the third column 33, and its diameter is larger than the first column 31 and smaller than the third column 33. The sealing insulating sleeve 42 is tightly sleeved on the outer wall of the second column 32. The second column 32 is inserted into the first through hole 11 of the collision cell 10, and is sleeved by the sealing insulating sleeve 42 to seal the first through hole 11. The third column 33 is connected to the upper end of the second column 32, and its diameter is the largest, and is connected to the external feeder. During the assembly process, the sealing insulating sleeve 42 is first sleeved on the second column 32 to ensure that it is tightly matched with the second column 32, and then the terminal 30 is inserted into the first through hole 11 and the second through hole 21 as a whole to achieve the connection between the electrode rod 20 and the external feeder.

[0057] In some embodiments, as Figure 3 shown, a plurality of first through holes 11 are provided on the side wall of the sleeve 10, and the plurality of first through holes 11 are arranged at intervals along the circumferential direction of the sleeve 10; the collision cell includes a plurality of electrode rods 20, and the plurality of electrode rods 20 are arranged at intervals along the circumferential direction of the sleeve 10 in the cavity, and the second through holes 21 of each electrode rod 20 correspond to each of the first through holes 11 one by one.

[0058] Exemplarily, four first through holes 11 are provided on the side wall of the sleeve 10, and the four first through holes 11 are equally spaced, and the included angle between two adjacent first through holes 11 is 90 degrees. The collision cell includes four electrode rods 20, and the four electrode rods 20 are aligned with the four first through holes 11 one by one. Correspondingly, each electrode rod 20 is connected to an external feeder through a terminal 30, and each of the first through holes 11 is sealed by a sealing assembly 40.

[0059] In some embodiments, as Figure 2 and Figure 3 shown, the two ends of the sleeve 10 are respectively an inlet end and an outlet end, and electronic lenses 50 are provided at both the inlet end and the outlet end of the sleeve 10; the collision cell includes a connecting member 60 and a fixing member 70, and the electronic lens 50 is connected to the sleeve 10 through the connecting member 60, and the fixing member 70 is sleeved inside the connecting member 60, and the plurality of electrode rods 20 are fixed to the connecting member 60 through the fixing member 70.

[0060] Specifically, the sleeve 10 is a long cylindrical structure, and its two ends are respectively an inlet end and an outlet end. The sleeve can be made of a metal material. The electronic lenses 50 are respectively installed at the inlet end and the outlet end of the sleeve 10 by means of pasting and are connected to the sleeve 10 through the connecting member 60. The fixing member 70 is a tubular structure, which is sleeved inside the connecting member 60 and is in close fit with the connecting member 60. The inner diameter of the fixing member 70 is slightly larger than the outer diameter of the electrode rod 20 so that the electrode rod 20 can pass through and be fixed inside the fixing member 70. For example, the fixing member 70 may be provided with a groove or a locking mechanism matching the electrode rod 20 inside to ensure that the electrode rod 20 will not loosen or shift. In this way, the plurality of electrode rods 20 are fixed inside the sleeve 10 through the fixing member 70 and the connecting member 60, forming a compact and stable multi-stage rod structure.

[0061] In some embodiments, as Figure 3 shown, the collision cell includes a third sealing ring 80, and the third sealing ring 80 is sleeved on the outer wall of the fixing member 70 and abuts against the inner wall of the connecting member 60.

[0062] Specifically, when the fixing member 70 is inserted into the connecting member 60, the third sealing ring 80 is deformed by extrusion, so as to fill the gap between the fixing member 70 and the connecting member 60, and seal the sleeve 10 from both ends of the sleeve 10, further improving the sealing effect of the collision cell.

[0063] In a second aspect, an embodiment of the present invention provides a mass spectrometer, which includes a collision cell.

[0064] Specifically, the mass spectrometer includes main components such as a sample introduction system, an ion source, a mass analyzer, a collision cell, and a detector. Among them, the collision cell, as one of the key components, is located between the ion source and the mass analyzer and is used for fragmenting ions and transferring energy.

[0065] As described above, the collision cell of this embodiment may include components such as a sleeve 10, an electrode rod 20, a terminal 30, a sealing assembly 40, an electron lens 50, a connecting member 60, a fixing member 70, an electrode rod 20, and a third sealing ring 80. The mass spectrometer provided in this embodiment optimizes the structural design of the collision cell to improve the sealing performance of the collision cell.

[0066] It should be understood that the term "and / or" used in the specification and appended claims of the present invention refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0067] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A collision cell for a mass spectrometer, characterized in that, Comprising: A sleeve, the interior of the sleeve having an axially penetrating cavity, and the side wall of the sleeve being provided with a first through hole communicating with the cavity; An electrode rod, the electrode rod being arranged in the cavity along the axial direction of the sleeve, the interior of the electrode rod having an axially penetrating channel, and the side wall of the electrode rod being provided with a second through hole communicating with the channel; A terminal, the terminal passing through the first through hole and the second through hole, one end of the terminal being connected to the electrode rod, and the other end of the terminal being connected to a feeder line outwardly; A sealing assembly, the sealing assembly being sleeved on the outer wall of the terminal and blocking the first through hole.

2. The collision cell for a mass spectrometer according to claim 1, wherein, The sealing assembly includes a sealing insulating sleeve and a first sealing ring, the sealing insulating sleeve being sleeved on the outer wall of the terminal, and the first sealing ring being sleeved on the outer wall of the sealing insulating sleeve and abutting against the inner wall of the first through hole to block the first through hole.

3. The collision cell for a mass spectrometer according to claim 2, wherein The outer wall of the sealing insulating sleeve is provided with a first annular groove surrounding the center of the sealing insulating sleeve, and the first sealing ring is embedded in the first annular groove.

4. The collision cell for a mass spectrometer according to claim 2 or 3, characterized in that, The sealing assembly further includes a second sealing ring, the second sealing ring being sleeved on the outer wall of the terminal and abutting against the inner wall of the sealing insulating sleeve.

5. The collision cell for a mass spectrometer according to claim 4, characterized in that, The inner wall of the sealing insulating sleeve is provided with a second annular groove surrounding the center of the sealing insulating sleeve, and the second sealing ring is embedded in the second annular groove.

6. The collision cell for a mass spectrometer according to claim 2, wherein, The terminal includes a first cylinder, a second cylinder and a third cylinder, the first cylinder being connected to one end of the second cylinder and passing through the second through hole, the second cylinder passing through the first through hole, and the third cylinder being connected to the end of the second cylinder far from the first cylinder; Wherein, the diameter of the third cylinder is greater than that of the second cylinder, the diameter of the second cylinder is greater than that of the first cylinder, and the sealing insulating sleeve is sleeved on the outer wall of the second cylinder.

7. The collision cell for a mass spectrometer according to claim 1, characterized in that, The side wall of the sleeve is provided with a plurality of the first through holes, and the plurality of first through holes are arranged at intervals along the circumferential direction of the sleeve; The collision cell includes a plurality of the electrode rods, the plurality of electrode rods being arranged at intervals along the circumferential direction of the sleeve in the cavity, and the second through holes of each electrode rod corresponding to the first through holes one by one.

8. The collision cell for a mass spectrometer according to claim 7, wherein, Both ends of the sleeve are respectively an inlet end and an outlet end, and electron lenses are provided at both the inlet end and the outlet end of the sleeve; The collision cell includes a connecting member and a fixing member, the electron lens being connected to the sleeve through the connecting member, the fixing member being sleeved in the connecting member, and the plurality of electrode rods being fixed to the connecting member through the fixing member.

9. The collision cell for a mass spectrometer according to claim 8, characterized in that, The collision cell includes a third sealing ring, the third sealing ring being sleeved on the outer wall of the fixing member and abutting against the inner wall of the connecting member.

10. A mass spectrometer, characterized in that, Comprising the collision cell for a mass spectrometer according to any one of claims 1 to 9.

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