Linear well suitable for miniaturized high-resolution mass spectrum

Abstract

According to the linear trap suitable for the miniaturized high-resolution mass spectrum, the electrodes with radio frequency and direct current control functions are decomposed, so that the circuit design is simple, the circuit board becomes smaller, the processing cost is reduced, and the requirement for miniaturization of mass spectrum equipment is met. The panel comprises: a front panel; a rear plate; an upper plate; a lower plate; a left plate; a right plate; the connecting frame body is used for fixed mounting; the front plate, the rear plate, the upper plate, the lower plate, the seat plate and the right plate are spliced to form a cube, the front plate and the rear plate are injection and emptying electrode blocks and are connected with DC, the upper plate, the lower plate, the left plate and the right plate are PCBs, annular electrodes which are arranged at intervals from the center to the outside are arranged on the upper plate, the lower plate, the left plate and the right plate, and DC or RF is loaded on the adjacent annular electrodes of each PCB.

Description

Technical Field

[0001] This utility model relates to the technical field of mass spectrometry equipment, specifically to a linear trap suitable for miniaturized high-resolution mass spectrometry. Background Technology

[0002] Linear traps primarily perform two functions when introducing ions into an electrostatic orbital trap cavity: ion trapping and ion pulse input / output. Ion trapping is controlled by radio frequency (RF) circuitry, while pulse control is controlled by DC circuitry. In existing linear traps, the electrodes are a single unit, so the RF and DC control are coupled together. Switching between these two functions during operation is complex, requiring consideration of various electrical parameters such as timing and high voltage rise / fall rates. This results in complex circuit design, relatively large circuit boards, and high manufacturing costs.

[0003] With the increasing demand for miniaturization of mass spectrometry equipment, how to miniaturize linear traps is an urgent technical problem to be solved. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a linear trap suitable for miniaturized high-resolution mass spectrometry. It decomposes electrodes that simultaneously possess radio frequency and DC electrical control, thereby simplifying circuit design, reducing circuit board size, lowering processing costs, and meeting the miniaturization requirements of mass spectrometry equipment.

[0005] A linear trap suitable for miniaturized high-resolution mass spectrometry, characterized in that it comprises:

[0006] front panel;

[0007] Back panel;

[0008] upper plate;

[0009] Lower board;

[0010] Left panel;

[0011] Right panel;

[0012] And the connecting frame for fixed installation;

[0013] The front plate, rear plate, upper plate, lower plate, base plate, and right plate are assembled to form a cube. The front plate and rear plate are injection and drainage electrode blocks connected to DC. The upper plate, lower plate, left plate, and right plate are all PCB boards. The upper plate, lower plate, left plate, and right plate are provided with annular electrodes arranged from the center outward. Adjacent annular electrodes on each PCB board are respectively loaded with DC or RF.

[0014] Its further features are:

[0015] The upper plate is specifically the PCB board corresponding to the push electrode, the lower plate is specifically the PCB board corresponding to the pull electrode, and the left and right plates are the PCB boards corresponding to the trapping electrodes. The push and pull electrodes are opposite each other. In the trapping ion sequence, they are used to assist the left and right plates in trapping and focusing ions. In the ion extraction sequence stage, they are used to introduce ions into the lower entrance slit. The left and right plates are trapping electrodes used to trap and focus ions injected into the linear trap.

[0016] The PCB board corresponding to the upper plate and the PCB board corresponding to the lower plate are the same PCB board. An alternating voltage is applied to the PCB board corresponding to the upper plate and the lower plate. The same first voltage is applied to the annular electrode at the same inner ring position of the PCB board of the upper plate and the lower plate. The same second voltage is applied to the annular electrode at the same outer ring position of the PCB board of the upper plate and the lower plate. The first voltage and the second voltage have the same value, opposite voltage polarity, and the same frequency.

[0017] The PCB board corresponding to the left plate and the PCB board corresponding to the right plate are the same PCB board. An alternating voltage is applied to the PCB board corresponding to the left plate and the right plate. The same third voltage is applied to the annular electrode at the same inner ring position of the PCB board corresponding to the left plate and the right plate. The same fourth voltage is applied to the annular electrode at the same outer ring position of the PCB board corresponding to the left plate and the right plate. The third voltage and the fourth voltage have the same value, opposite voltage polarity, and the same frequency.

[0018] With the structure of this invention, the spaced ring motors on the PCB board allow for separate power supply for RF and DC, effectively simplifying the circuit board. The parts used for switching between RF and DC on existing circuit boards can be omitted. It is only necessary to ensure sufficient spacing between the ring electrodes during the design of the ring electrodes to prevent RF from affecting DC. Furthermore, since the supply current of the ring electrodes is very small, the width of the ring electrodes themselves does not need to be very wide, which provides ample space for the spacing width. The new circuit board is divided into independent RF and DC modules, and the resulting circuit board is at least one-third smaller than that of existing circuit boards. Moreover, by replacing the original electrode blocks with PCB boards, the processing cost is reduced. In summary, it decomposes the electrodes that simultaneously possess RF and DC power control, making the circuit design simpler, the circuit board smaller, and the processing cost lower, thus meeting the miniaturization requirements of mass spectrometry equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 (Remove the front panel);

[0021] Figure 3 Arrows indicate the alternating voltage-loaded ring electrode of this invention;

[0022] Figure 4 This is an electric field diagram corresponding to a specific embodiment of the present invention;

[0023] The names corresponding to the serial numbers in the diagram are as follows:

[0024] Front panel 10, rear panel 20, upper panel 30, lower panel 40, left panel 50, right panel 60, connecting frame 70;

[0025] Central circular electrode 1, first circular electrode 2, second circular electrode 3, third circular electrode 4, and interval 5. Detailed Implementation

[0026] Linear traps suitable for miniaturized high-resolution mass spectrometry, see Figure 1 , Figure 2 It includes a front panel 10, a rear panel 20, an upper panel 30, a lower panel 40, a left panel 50, a right panel 60, and a connecting frame 70 for fixed installation.

[0027] The front plate 10, rear plate 20, upper plate 30, lower plate 40, left plate 50, and right plate 60 are assembled to form a cube. The front plate 10 and rear plate 20 are electrode blocks for injection and drainage, and are connected to DC. The upper plate 30, lower plate 40, left plate 50, and right plate 60 are all PCB boards. The upper plate 30, lower plate 40, left plate 50, and right plate 60 are provided with annular electrodes arranged from the center outward. The adjacent annular electrodes of each PCB board are respectively loaded with DC or RF.

[0028] The upper plate 30 is the PCB board corresponding to the push electrode, the lower plate 40 is the PCB board corresponding to the pull electrode, the left plate 50 and the right plate 60 are the PCB boards corresponding to the trapping electrodes. The upper and lower plates are the push and pull electrodes, which are used to assist the left and right plates in trapping and focusing ions during the trapping ion sequence. During the ion extraction sequence, they are used to introduce ions into the lower entrance slit. The left plate 50 and the right plate 60 are trapping electrodes, which are used to trap and focus ions injected into the linear trap.

[0029] The PCB board corresponding to the upper plate 30 and the PCB board corresponding to the lower plate 40 are the same PCB board. An alternating voltage is applied to the PCB boards corresponding to the upper plate 30 and the lower plate 40. The same first voltage is applied to the annular electrodes at the same inner ring position of the PCB boards of the upper plate 30 and the lower plate 40. The same second voltage is applied to the annular electrodes at the same outer ring position of the PCB boards of the upper plate 30 and the lower plate 40. The first voltage and the second voltage have the same value, opposite voltage polarity, and the same frequency.

[0030] The PCB board corresponding to the left board 50 and the PCB board corresponding to the right board 60 are the same PCB board. An alternating voltage is applied to the PCB boards corresponding to the left board 50 and the right board 60. The same third voltage is applied to the ring electrode at the same inner ring position of the PCB boards of the left board 50 and the right board 60. The same fourth voltage is applied to the ring electrode at the same outer ring position of the PCB boards of the left board 50 and the right board 60. The third voltage and the fourth voltage have the same value, opposite voltage polarity, and the same frequency.

[0031] For specific embodiments, see Figure 3 The central areas of the PCBs corresponding to the upper board 30, lower board 40, left board 50, and right board 60 each include a central circular electrode 1, a first circular electrode 2, a second circular electrode 3, and a third circular electrode 4. A spacing 5 is provided between each of these electrodes. In practice, an alternating voltage (as shown by the arrows in the diagram) is applied to the first circular electrode 2 and the third circular electrode 4 of each PCB group. The voltage amplitude is 500V, and the frequency is 3MHz. The voltage values ​​of the first circular electrode 2 and the third circular electrode 4 of each PCB group are the same but their polarities are opposite. Voltages are applied to the circular electrodes indicated by the arrows. A pair is placed left and right, and a pair is placed top and bottom, forming a quadrupole field.

[0032] Figure 4 This is an electric field diagram formed after applying a voltage to the ring electrode in a specific embodiment.

[0033] Its working principle is as follows: The spaced ring motors on the PCB board separate the RF and DC power supplies, which can also effectively simplify the circuit board. The part used to switch between RF and DC on the existing circuit board can be omitted. It is only necessary to ensure that there is enough spacing between the ring electrodes when designing the ring electrodes to prevent the RF from affecting the DC. Since the supply current of the ring electrodes is very small, the width of the ring electrodes themselves does not need to be very wide, which also provides sufficient space for the spacing width. The new circuit board is divided into independent RF and DC modules. The circuit board is at least one-third smaller than the circuit board of the existing technology. The replacement of the original electrode blocks by the PCB board reduces the processing cost. In summary, it decomposes the electrodes that have both RF and DC control, which simplifies the circuit design, reduces the size of the circuit board, reduces the processing cost, and meets the miniaturization requirements of mass spectrometry equipment.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A linear trap suitable for miniaturized high resolution mass spectrometry, characterized in that, It includes: A front plate; A back plate; An upper plate; A lower plate; A left plate; A right plate; And a connecting frame for fixing; The front plate, back plate, upper plate, lower plate, seat plate, right plate are combined to form a cube, the front plate and back plate are injection and evacuation electrode blocks, connected with DC, the upper plate, lower plate, left plate and right plate are all PCB plates, the upper plate, lower plate, left plate and right plate are provided with annular electrodes arranged with intervals from the center, and each adjacent annular electrode of the PCB plate is loaded with DC or RF.

2. The linear ion trap suitable for miniaturized high resolution mass spectrometry according to claim 1, characterized in that: The upper plate is a PCB plate corresponding to the push electrode, the lower plate is a PCB plate corresponding to the pull electrode, the left plate and the right plate are PCB plates corresponding to the trapping electrodes, the push and pull electrodes are opposite to each other, and in the ion trapping sequence, the left plate and the right plate are used to assist in trapping and focusing ions, and in the ion extraction sequence stage, the left plate and the right plate are used to guide the ions into the lower incident slit, the left plate and the right plate are trapping electrodes, and are used to trap and focus ions injected into the linear ion trap.

3. The linear ion trap suitable for miniaturized high resolution mass spectrometry according to claim 2, characterized in that: The PCB plate corresponding to the upper plate and the PCB plate corresponding to the lower plate are the same PCB plate, the PCB plates corresponding to the upper plate and the lower plate are loaded with alternating voltages, the annular electrodes at the same inner ring position of the PCB plates of the upper plate and the lower plate are loaded with the same first voltage, the annular electrodes at the same outer ring position of the PCB plates of the upper plate and the lower plate are loaded with the same second voltage, and the first voltage and the second voltage have the same value, opposite voltage polarity and the same frequency.

4. The linear ion trap suitable for miniaturized high resolution mass spectrometry according to claim 2, wherein: The PCB plate corresponding to the left plate and the PCB plate corresponding to the right plate are the same PCB plate, the PCB plates corresponding to the left plate and the right plate are loaded with alternating voltages, the annular electrodes at the same inner ring position of the PCB plates of the left plate and the right plate are loaded with the same third voltage, the annular electrodes at the same outer ring position of the PCB plates of the left plate and the right plate are loaded with the same fourth voltage, and the third voltage and the fourth voltage have the same value, opposite voltage polarity and the same frequency.

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