CN115799039A - Linear ion trap, mass spectrometer and ion trap manufacturing method - Google Patents
Linear ion trap, mass spectrometer and ion trap manufacturing method Download PDFInfo
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- CN115799039A CN115799039A CN202310035081.8A CN202310035081A CN115799039A CN 115799039 A CN115799039 A CN 115799039A CN 202310035081 A CN202310035081 A CN 202310035081A CN 115799039 A CN115799039 A CN 115799039A
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- ion trap
- linear ion
- cylindrical rod
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- 238000005040 ion trap Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 150000002500 ions Chemical class 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention provides a linear ion trap, a mass spectrometer and an ion trap manufacturing method, belonging to the technical field of mass analysis instruments, wherein the linear ion trap comprises: the array structure comprises four columnar electrodes arranged in parallel, and the columnar electrodes are arranged in a circumferential array around a central shaft. The section of the columnar electrode is fan-shaped, the arc-shaped surface of the columnar electrode is a quarter circular arc and faces the central shaft, two side surfaces of the columnar electrode are perpendicular to each other, a groove is formed in the intersected edge of the two side surfaces along the length direction of the columnar electrode, a crack is formed in the bottom of the groove along the length direction of the columnar electrode and is formed in the middle section of the columnar electrode, and an included angle bisection surface between the two side surfaces is coplanar with the crack. The mass spectrometer comprises a linear ion trap as described above. The ion trap manufacturing method is used for manufacturing the linear ion trap. The columnar electrode has higher shape and position precision, and can effectively improve the gap detection effect of the mass spectrometer.
Description
Technical Field
The invention belongs to the technical field of mass analysis instruments, and particularly relates to a linear ion trap, a mass spectrometer and an ion trap manufacturing method.
Background
Mass spectrometers are commonly used instruments for analyzing chemical components of substances. Can be used to analyze chemical compositions in objects and to elucidate the structure and chemical characteristics of molecules. The ion trap is used as a core part of a mass spectrometer, is mainly used for confining ions in a certain space and can perform mass analysis on the ions or dissociate the ions. The ion trap can be divided into a three-dimensional ion trap structure and a linear ion trap structure.
The three-dimensional ion trap is composed of a ring electrode and two end cap electrodes, but the structural processing and assembly of the hyperboloid electrode are difficult, and the three-dimensional ion trap mainly binds ions in a predetermined spherical range or even a point range, so that the quantity of bound ions is small, and the application is only small.
The linear ion trap is formed by four parallel columnar electrodes which surround a virtual central axis and are arrayed along the circumference, and the four columnar electrodes have the same curved surface.
The cylindrical electrodes of the existing linear ion trap are mostly formed by processing single rectangular bar materials, so that the shape difference of four cylindrical electrodes applied to the same ion trap is large, particularly the curvature of a curved surface and the form and position precision of a crack, the distribution of ions around a central shaft is dispersed, and the analysis and detection effect of a mass spectrometer is influenced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the linear ion trap, the mass spectrometer and the ion trap manufacturing method, the columnar electrode has higher form and position precision, and the gap detection effect of the mass spectrometer can be effectively improved.
In order to realize the purpose of the invention, the following scheme is adopted:
a linear ion trap comprising: the array structure comprises four columnar electrodes arranged in parallel, and the columnar electrodes are arranged in a circumferential array around a central shaft.
The four columnar electrodes are formed in the same length range of a raw material, the sections of the columnar electrodes are fan-shaped, the arc-shaped surfaces of the columnar electrodes are quarter arcs and face the central shaft, the two side surfaces of the columnar electrodes are perpendicular to each other, the edges of the two intersected side surfaces are provided with grooves along the length direction of the columnar electrodes, the bottoms of the grooves are provided with cracks along the length direction of the columnar electrodes, the cracks are formed in the middle sections of the columnar electrodes, and the included angle bisection surface between the two side surfaces is coplanar with the cracks.
Furthermore, both ends are provided with end covers, the inner end face of each end cover is provided with a rectangular counter bore, four columnar electrodes are respectively arranged at four corners of each rectangular counter bore, the end faces of the columnar electrodes are in contact with the bottom faces of the rectangular counter bores, and the side faces of the columnar electrodes are attached to the inner side walls of the rectangular counter bores.
Furthermore, four column electrodes are arranged in a pipe fitting, the inside of the cross section of the pipe fitting is rectangular, the four column electrodes are arranged at four corners of the pipe fitting respectively, and the side surfaces of the four column electrodes are attached to the inner wall of the pipe fitting.
Further, the pipe fitting is a rectangular pipe.
Furthermore, the cross section of the groove is of a V-shaped structure, and the two inner side walls are perpendicular to each other.
Furthermore, the cross section of the groove is a quarter arc groove.
A mass spectrometer comprises the linear ion trap.
An ion trap manufacturing method for manufacturing the linear ion trap includes the steps:
s1: providing a cylindrical rod, and machining the outer wall of the cylindrical rod;
s2: processing two strip-shaped through holes in the middle section of the cylindrical rod along mutually vertical directions, wherein the intersection line of the two strip-shaped through holes is collinear with the axis of the cylindrical rod;
s3: coaxially processing a through hole on the cylindrical rod;
s4: and cutting the cylindrical rod along a bisection plane of an included angle between the adjacent through holes to enable the cylindrical rod to form four independent cylindrical electrodes.
The invention has the beneficial effects that: four column electrodes are formed by processing the same column rod, the arc surface arc curvature and the surface quality of the column electrodes are effectively guaranteed, and meanwhile, the four column electrodes are enabled to have consistent sizes and shapes, so that the relative position precision of the column electrodes in the ion trap is improved, the tolerance range of the central shaft is smaller, ions are further more gathered near the central shaft, the ions are more concentrated and bound, and the detection and analysis effects of a mass spectrometer are effectively improved. In addition, the scheme can also effectively reduce the manufacturing process of the columnar electrode, and improve the processing and manufacturing efficiency while improving the quality of the columnar electrode.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Figure 1 shows a schematic diagram of a preferred embodiment of the linear ion trap of the present application.
Fig. 2 shows a schematic structure diagram of another preferred embodiment of the linear ion trap of the present application.
Fig. 3 shows a cross-sectional view of a cylindrical rod after machining a strip-shaped through hole.
Fig. 4 shows a schematic structural diagram of the cylindrical rod after the strip-shaped through holes and the through holes are processed.
Fig. 5 shows a schematic structural diagram of the cylindrical rod after slitting.
The labels in the figure are: the electrode comprises a columnar electrode-1, a side face-11, a groove-12, an inner side wall-121, a crack-13, an end cover-2, a rectangular counter bore-21, a pipe fitting-3, a cylindrical rod-4, a strip-shaped through hole-41 and a through hole-42.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
Example 1
As shown in fig. 1 or 2, a linear ion trap comprising: four columnar electrodes 1 arranged in parallel, and the columnar electrodes 1 are arranged in a circumferential array around a central axis.
Specifically, four column electrodes 1 are formed in the same length range of a raw material to facilitate processing, the cross section of each column electrode 1 is fan-shaped, the arc surface of each column electrode 1 is a quarter arc, the arc surface faces the central shaft, and two side surfaces 11 of each column electrode 1 are perpendicular to each other to facilitate assembly and positioning.
Specifically, as shown in fig. 1 or fig. 2, a groove 12 is formed in an edge where two side surfaces 11 intersect with each other along the length direction of the columnar electrode 1, a slit 13 is formed in the bottom of the groove 12 along the length direction of the columnar electrode 1, the slit 13 is formed in the middle section of the columnar electrode 1, and an included angle bisector between the two side surfaces 11 is coplanar with the slit 13, so as to facilitate processing and ensure the position accuracy of the slit 13 when the columnar electrode 1 is assembled.
As a preferred structure of the linear ion trap, as shown in fig. 1, two ends of the linear ion trap are respectively provided with an end cover 2, the inner end surface of the end cover 2 is provided with a rectangular counter bore 21, four columnar electrodes 1 are respectively arranged at four corners of the rectangular counter bore 21, the end surface of each columnar electrode 1 is in contact with the bottom surface of the rectangular counter bore 21, and the side surface 11 is attached to the inner side wall of the rectangular counter bore 21, the structure utilizes the rectangular counter bore 21 of the end cover 2 to assemble and position the columnar electrodes 1, and the assembly position precision of the four columnar electrodes 1 can be effectively controlled by ensuring the dimensional precision of the rectangular counter bore 21, so that the cracks 13 on the diagonally arranged columnar electrodes 1 are aligned and are positioned on the same plane; similarly, the other pair of cracks 13 can be in the same plane, and the intersection line of the two planes is the position of the central axis, so as to ensure that ions are more concentrated and bound near the central axis; and the rectangular counter bore 21 is of a rectangular structure, four inner side walls of the rectangular counter bore 21 are perpendicular to each other, the side surface 11 is used for limiting in a manner of being attached to the inner wall of the rectangular counter bore 21, so that the assembly is more convenient and effective, the end surfaces of the four columnar electrodes 1 can be aligned by using the bottom surface of the rectangular counter bore 21, and therefore it is ensured that the four cracks 13 are aligned along the length direction of the center.
As another preferred structure of the linear ion trap, as shown in fig. 2, four columnar electrodes 1 are all arranged in a pipe fitting 3, the inside of the cross section of the pipe fitting 3 is rectangular, the four columnar electrodes 1 are respectively arranged at four corners of the pipe fitting 3, the side surfaces 11 are both attached to the inner wall of the pipe fitting 3, the side wall of the pipe fitting 3 is provided with an ion injection pipe, the rectangular structure inside the pipe fitting 3 and the inner wall of the rectangular counter bore 21 on the end cover 2 have the same limiting effect, and meanwhile, the peripheral covering structure of the columnar electrodes 1 is also considered.
Further preferably, the pipe member 3 is a rectangular pipe, which is easily available in raw materials and is easy to process.
Preferably, the cross section of the groove 12 is a V-shaped structure, and the two inner sidewalls 121 are perpendicular to each other.
As another preferred structure, the cross section of the groove 12 is a quarter circular arc groove.
Example 2
A mass spectrometer comprising the linear ion trap disclosed in embodiment 1, having good detection and analysis effects.
Example 3
An ion trap manufacturing method for manufacturing the linear ion trap disclosed in embodiment 1, comprising the steps of:
s1: as shown in fig. 3, a cylindrical rod 4 is provided, and the outer wall of the cylindrical rod 4 is machined, so that the outer wall of the cylindrical rod 4 is in a regular circular shape, the size precision and the surface quality of the outer wall of the cylindrical rod 4 are improved, the size precision and the surface quality of the arc surface of the cylindrical electrode 1 are ensured, and turning and cylindrical grinding can be specifically adopted.
S2: as shown in fig. 3, two strip-shaped through holes 41 are formed in the middle section of the cylindrical rod 4 in the mutually perpendicular directions, and the intersection line of the two strip-shaped through holes 41 is collinear with the axis of the cylindrical rod 4.
S3: as shown in fig. 4, a through hole 42 is coaxially processed in the cylindrical rod 4. Specifically, when the cross section of the groove 12 is V-shaped and the inner side walls 121 are perpendicular to each other, the through hole 42 is a rectangular hole, and the inner side walls 121 are formed by the inner walls of the through hole 42 after slitting; when the cross section of the groove 12 is a quarter arc groove, the through hole 42 is a circular hole.
S4: as shown in fig. 5, the cylindrical rod 4 is cut along the bisector of the included angle between the adjacent through holes 41, so that the cylindrical rod 4 forms four separate cylindrical electrodes 1, the cut surface of the cylindrical rod 4 forms the side surface 11 of the cylindrical electrode 1, the through hole 42 is divided into four grooves 12 of the cylindrical electrode 1, the inner wall of the through hole 42 forms the inner side wall 121, and the slit 13 is formed in the strip-shaped through hole 41.
The method can simultaneously form the arc surfaces of the four columnar electrodes 1 through one-time processing; forming grooves 12 of four columnar electrodes 1 simultaneously through one-time processing; compared with the method for manufacturing the columnar electrode 1 singly, the method not only can effectively reduce the processing procedures, but also can ensure the consistency of the shapes and the sizes of the four columnar electrodes 1, further ensure the assembly precision of the columnar electrodes 1, and further improve the detection effect of a mass spectrometer.
The foregoing is only a preferred embodiment of the present invention and is not intended to be exhaustive or to limit the invention. It should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention as defined by the claims below.
Claims (8)
1. A linear ion trap comprising: four parallel arrangement's column electrode (1), and column electrode (1) sets up around the circumference array of a center pin, a serial communication port, four column electrode (1) are formed in the same length scope of a raw materials, the cross-section of column electrode (1) is fan-shaped, its arcwall face is the quarter circular arc, and the arcwall face is towards the center pin, two sides (11) mutually perpendicular of column electrode (1), recess (12) have been seted up along the length direction of column electrode (1) to the crisscross edge of two sides (11), crack (13) have been seted up along the length direction of column electrode (1) in the bottom of recess (12), and crack (13) are formed in the middle section of column electrode (1), contained angle bisector between two sides (11) and crack (13) coplane.
2. The linear ion trap as claimed in claim 1, wherein both ends are provided with end caps (2), the inner end face of each end cap (2) is provided with a rectangular counter bore (21), four columnar electrodes (1) are respectively arranged at four corners of the rectangular counter bore (21), the end faces of the columnar electrodes (1) are in contact with the bottom faces of the rectangular counter bores (21), and the side faces (11) are attached to the inner side walls of the rectangular counter bores (21).
3. The linear ion trap as claimed in claim 1, wherein four columnar electrodes (1) are arranged in a tube (3), the inside of the cross section of the tube (3) is rectangular, the four columnar electrodes (1) are respectively arranged at four corners of the tube (3), and the side surfaces (11) are attached to the inner wall of the tube (3).
4. A linear ion trap as claimed in claim 3, wherein the tubular member (3) is a rectangular tube.
5. A linear ion trap as claimed in claim 1, wherein the cross-section of the recess (12) is V-shaped and the two inner side walls (121) are perpendicular to each other.
6. A linear ion trap as claimed in claim 1, characterised in that the cross-section of the recess (12) is a quarter-arc groove.
7. A mass spectrometer comprising the linear ion trap of any of claims 1 to 6.
8. An ion trap fabrication method for fabricating the linear ion trap of any of claims 1-6, comprising the steps of:
s1: providing a cylindrical rod (4), and machining the outer wall of the cylindrical rod (4);
s2: two strip-shaped through holes (41) are formed in the middle section of the cylindrical rod (4) in a processing mode along mutually perpendicular directions, and the intersection line of the two strip-shaped through holes (41) is collinear with the axis of the cylindrical rod (4);
s3: coaxially processing a through hole (42) on the cylindrical rod (4);
s4: and cutting the cylindrical rod (4) along a bisection plane of an included angle between the adjacent through holes (41), so that the cylindrical rod (4) forms four independent cylindrical electrodes (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310035081.8A CN115799039A (en) | 2023-01-10 | 2023-01-10 | Linear ion trap, mass spectrometer and ion trap manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310035081.8A CN115799039A (en) | 2023-01-10 | 2023-01-10 | Linear ion trap, mass spectrometer and ion trap manufacturing method |
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| CN115799039A true CN115799039A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310035081.8A Pending CN115799039A (en) | 2023-01-10 | 2023-01-10 | Linear ion trap, mass spectrometer and ion trap manufacturing method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369510A (en) * | 2008-09-27 | 2009-02-18 | 复旦大学 | Annular tube shaped electrode ion trap |
| CN102231356A (en) * | 2009-12-01 | 2011-11-02 | 株式会社岛津制作所 | Linear ion trap analyzer |
| US20120043461A1 (en) * | 2010-08-12 | 2012-02-23 | Evgenij Nikolaev | Kingdon mass spectrometer with cylindrical electrodes |
| CN105144339A (en) * | 2013-04-23 | 2015-12-09 | 莱克公司 | Multi-reflecting mass spectrometer with high throughput |
| CN109300770A (en) * | 2018-10-23 | 2019-02-01 | 中国工程物理研究院机械制造工艺研究所 | The processing method of ion trap pedestal, ion trap and hyperboloid quadrupole rod |
-
2023
- 2023-01-10 CN CN202310035081.8A patent/CN115799039A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369510A (en) * | 2008-09-27 | 2009-02-18 | 复旦大学 | Annular tube shaped electrode ion trap |
| CN102231356A (en) * | 2009-12-01 | 2011-11-02 | 株式会社岛津制作所 | Linear ion trap analyzer |
| US20120043461A1 (en) * | 2010-08-12 | 2012-02-23 | Evgenij Nikolaev | Kingdon mass spectrometer with cylindrical electrodes |
| CN105144339A (en) * | 2013-04-23 | 2015-12-09 | 莱克公司 | Multi-reflecting mass spectrometer with high throughput |
| CN109300770A (en) * | 2018-10-23 | 2019-02-01 | 中国工程物理研究院机械制造工艺研究所 | The processing method of ion trap pedestal, ion trap and hyperboloid quadrupole rod |
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Application publication date: 20230314 |