Quadrupole assembly, ionization source and mass spectrometer

Abstract

The utility model discloses a quadrupole rod assembly, an ionization source and a mass spectrometer, the quadrupole rod assembly comprises a plurality of pole rods and a radio frequency circuit board, the plurality of pole rods are arranged around an ion channel, the pole rods comprise a plurality of segmented electrodes which are mutually insulated, and the segmented electrodes are provided with contact pins; the radio frequency circuit board is provided with metal via holes corresponding to the pins, the pins are inserted into the corresponding metal via holes and electrically connected with the radio frequency circuit board, and capacitors and resistors are connected among the multiple metal via holes. According to the quadrupole rod assembly provided by the embodiment of the utility model, the segmented electrodes and the radio frequency circuit board are electrically connected in a plugging manner, so that the connection structure of the pole rods and the radio frequency circuit board is simple and firm, the assembly efficiency can be improved, and the later maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mass spectrometry analysis instruments, in particular to a quadrupole assembly, an ionization source and a mass spectrometer. Background Art

[0002] A mass spectrometer is a high-end experimental device. The ionization source in the mass spectrometer can ionize sample molecules. By accelerating and separating in an electric field, ions of different mass-to-charge ratios will enter the detector separately, thereby realizing the detection and analysis of material components. In order to enhance the ionization efficiency of the ionization source and the transmission efficiency of ions, Li Haiyang et al. installed a radio frequency quadrupole in the ionization source (patent application number 201611019687.9). In order to apply radio frequency and DC voltage to the quadrupole, the wiring of the quadrupole is usually very complicated, which is not conducive to the assembly, internal troubleshooting and replacement of the quadrupole, and increases the maintenance cost of the instrument. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a quadrupole assembly, the connection structure between the pole and the radio frequency circuit board is simple and firm, the assembly efficiency of the quadrupole assembly is improved, and the subsequent maintenance is convenient.

[0004] Another object of the present invention is to provide an ionization source, comprising the aforementioned quadrupole assembly.

[0005] Another object of the present invention is to provide a mass spectrometer, comprising the aforementioned ionization source.

[0006] According to the quadrupole assembly of the embodiment of the utility model, it includes: a plurality of poles and a radio frequency circuit board, the plurality of poles are arranged around an ion channel, the poles include a plurality of segmented electrodes insulated from each other, the segmented electrodes are provided with pins; the radio frequency circuit board is provided with metal vias corresponding to the pins, the pins are plugged into the corresponding metal vias and are electrically connected to the radio frequency circuit board, and capacitors and resistors are connected between the plurality of metal vias.

[0007] According to the quadrupole assembly of the embodiment of the utility model, by arranging pins on the segmented electrodes and arranging metal vias on the radio frequency circuit board, the segmented electrodes and the radio frequency circuit board are electrically connected by plugging, so that the connection structure between the pole and the radio frequency circuit board is simple and firm, and the assembly efficiency of the quadrupole assembly is improved, the problem of complex internal wiring of the quadrupole assembly is solved, and the reliability of the ionization source is improved. In addition, the plug-in method facilitates the maintenance of the quadrupole assembly. For example, when the radio frequency circuit board fails, the radio frequency circuit board can be directly unplugged from the pole and replaced with a new one, thereby improving the convenience of ionization source maintenance.

[0008] In addition, the quadrupole assembly according to the above embodiment of the utility model may also have the following additional technical features:

[0009] In some embodiments, the pins on the multiple segmented electrodes in the pole are on the same side of the pole and arranged side by side along the axis direction of the pole, and the pins extend along the radial direction of the corresponding segmented electrodes.

[0010] In some embodiments, the pole further includes a support rod, the segmented electrode is constructed into a ring shape and is sleeved on the support rod, and an insulating ring is provided between adjacent segmented electrodes.

[0011] In some embodiments, the plurality of rods include a first rod, a second rod, a third rod and a fourth rod, the radio frequency circuit board includes a first circuit board and a second circuit board, the first rod, the second rod, the third rod and the fourth rod are arranged between the first circuit board and the second circuit board, the first rod and the second rod are close to the first circuit board, and the pin of the first rod and the pin of the second rod are plugged into the first circuit board, the third rod and the fourth rod are close to the second circuit board, and the pin of the third rod and the pin of the fourth rod are plugged into the second circuit board.

[0012] In some embodiments, one of the first circuit board and the second circuit board includes a power terminal, and the first circuit board and the second circuit board are electrically connected.

[0013] In some embodiments, the pins on the first pole and the second pole face the same direction and face the first circuit board; the pins on the third pole and the fourth pole face the same direction and face the second circuit board.

[0014] The ionization source according to the embodiment of the utility model comprises: a shell, an ultraviolet lamp assembly, a repeller electrode and the aforementioned quadrupole assembly, wherein the shell has an ionization source chamber and an injection channel, and one side of the shell has an opening; the ultraviolet lamp assembly is connected to the shell and is opposite to the opening; the repeller electrode is arranged in the shell and is opposite to the opening; the quadrupole assembly is arranged in the shell, wherein the ultraviolet lamp assembly, the repeller electrode and the quadrupole assembly are arranged in sequence in the axial direction of the vacuum ultraviolet lamp.

[0015] According to the ionization source of the embodiment of the present invention, by providing the aforementioned quadrupole assembly, the assembly efficiency of the ionization source can be improved and the maintenance of the ionization source can be facilitated.

[0016] In some embodiments, the ultraviolet lamp assembly includes: a lampshade, an ultraviolet lamp and an elastic member, wherein the lampshade covers the opening and is detachably connected to the shell; the ultraviolet lamp has a first end and a second end opposite to each other in the axial direction of the vacuum ultraviolet lamp, and the first end is farther away from the repulsion electrode than the second end; the elastic member is connected and electrically connected to the lampshade and the first end of the ultraviolet lamp, and has an elastic force that presses the ultraviolet lamp toward the repulsion electrode, and the second end of the ultraviolet lamp abuts against and is electrically connected to the repulsion electrode.

[0017] In some implementations, the repelling electrode includes a first electrode and a second electrode, the first electrode and the second electrode are arranged along the axis direction of the vacuum ultraviolet lamp, and one end of the injection channel is located between the first electrode and the second electrode.

[0018] The mass spectrometer according to the embodiment of the utility model includes the aforementioned ionization source.

[0019] The mass spectrometer according to the embodiment of the utility model solves the problem of complex internal wiring of the quadrupole assembly by providing the aforementioned ionization source, improves the reliability of the ionization source, thereby reducing the failure rate of the mass spectrometer and facilitating the later maintenance of the mass spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a quadrupole assembly according to some embodiments of the present invention.

[0021] Figure 2 Schematic diagram of segmented electrodes in some embodiments of the present invention.

[0022] Figure 3 It is a schematic diagram of a radio frequency circuit board of some embodiments of the utility model.

[0023] Figure 4 It is a schematic diagram of radio frequency voltage loading on a quadrupole assembly in some embodiments of the utility model.

[0024] Figure 5 Schematic diagram of the ionization source of some embodiments of the present invention.

[0025] Figure 6 It is a schematic diagram of the ionization source of other embodiments of the utility model.

[0026] Figure 7 It is a schematic diagram of an ultraviolet lamp according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Ionization source 1000,

[0029] Quadrupole assembly 100, pole 10, first pole 11, segmented electrode 111, pin 1111, support rod 112, insulating ring 113, second pole 12, third pole 13, fourth pole 14, RF circuit board 20, first circuit board 21, metal via 211, power terminal 213, cable 214, socket 215, second circuit board 22,

[0030] Shell 300, ionization source chamber 310, injection channel 320, reagent gas injection tube 321, sample gas injection tube 322,

[0031] UV lamp assembly 400, lamp cover 410, UV lamp 420, first end 421, second end 422, elastic member 430,

[0032] Repelling electrode 500, first electrode 510, second electrode 520,

[0033] Differential electrode 600 , ion transmission outlet 610 . DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The utility model provides a quadrupole assembly 100 , which can be applied to an ionization source 1000 of a mass spectrometer.

[0036] The ionization source 1000 of the mass spectrometer can convert the sample molecules to be analyzed into charged ions. The quadrupole assembly 100 of the utility model can be applied to different types of ionization sources 1000. This application mainly uses vacuum ultraviolet lamp ionization and chemical ionization composite ionization source 1000 as examples for illustration, but it is not a limitation on the scope of protection of this application. When the sample to be analyzed is introduced into the ionization source chamber 310, a reagent gas is added, and photoelectrons are used to generate reagent ions. The reagent ions collide with the sample to be tested to produce an ion-molecule reaction, so that the sample molecules are ionized to generate sample ions. By setting the quadrupole assembly 100, the collision frequency between the sample to be analyzed and the reagent ions can be increased, and the transmission efficiency of the sample ions can be improved, thereby improving the detection accuracy of the instrument.

[0037] Combination Figure 1According to the quadrupole assembly 100 of the embodiment of the utility model, it includes a plurality of poles 10, and the plurality of poles 10 are arranged around the ion channel. Specifically, there is a central area in the middle of the plurality of poles 10, and the plurality of poles 10 are arranged around the central area. The ion channel is the central area surrounded by the plurality of poles 10. After entering the quadrupole assembly 100, the sample and the reagent ions collide, and the sample molecules are converted into charged ions to achieve subsequent mass spectrometry analysis. Among them, the quadrupole assembly 100 may include a plurality of poles 10, and each pole 10 may include a plurality of segmented electrodes 111 insulated from each other, and the segmented electrodes 111 are provided with pins 1111.

[0038] The quadrupole assembly 100 may also include a radio frequency circuit board 20, on which a metal via 211 corresponding to the pin 1111 is provided, and the pin 1111 is plugged into the corresponding metal via 211 and electrically connected to the radio frequency circuit board 20. Specifically, the pin 1111 on the segmented electrode 111 may be plugged into the metal via 211 of the radio frequency circuit board 20, so that a voltage can be applied to the segmented electrode 111 through the radio frequency circuit board 20. The segmented electrode 111 and the radio frequency circuit board 20 are matched by plugging, so that the electrical connection between the segmented electrode 111 and the radio frequency circuit board 20 is simple, and a complex circuit is avoided between the segmented electrode 111 and the radio frequency circuit board 20, thereby improving the efficiency of assembly and facilitating later maintenance.

[0039] It is understandable that the introduction of multiple poles 10 inside the ionization source 1000, and the provision of multiple segmented electrodes 111 on the poles 10, will occupy the space inside the ionization source 1000. In order to apply radio frequency and DC voltages to the segmented electrodes 111, the wiring of the quadrupole assembly 100 will become very complicated. In addition, since the space inside the ionization source 1000 is relatively small, the installation of the ionization source 1000, internal troubleshooting, and replacement of components are difficult and time-consuming, thereby increasing the maintenance cost of the instrument.

[0040] According to the quadrupole assembly 100 of the embodiment of the utility model, by setting a pin 1111 on the segmented electrode 111 and setting a metal via 211 on the RF circuit board 20, the segmented electrode 111 and the RF circuit board 20 are electrically connected by plugging, so that the connection structure between the pole 10 and the RF circuit board 20 is simple and firm, and the assembly efficiency of the quadrupole assembly 100 is improved, the problem of complex internal wiring of the quadrupole assembly 100 is solved, and the reliability of the ionization source 1000 is improved. In addition, the plug-in method facilitates the maintenance of the quadrupole assembly 100. For example, when the RF circuit board 20 fails, the RF circuit board 20 can be directly unplugged from the pole 10 and replaced with a new RF circuit board 20, thereby improving the convenience of maintenance of the ionization source 1000.

[0041] Among them, the pole 10 includes a plurality of segmented electrodes 111 insulated from each other, and the pole 10 can be set in different forms. For example, on each pole 10, an insulating part such as a plastic part or a ceramic part can be fixedly connected between adjacent segmented electrodes 111. For another example, the pole 10 may include a support rod 112, and the segmented electrode 111 may be a ring-shaped structure. The segmented electrode 111 is sleeved on the support rod 112, and an insulating part is sleeved between adjacent segmented electrodes 111. The support rod 112 can support the segmented electrode 111 and can achieve mutual insulation between adjacent segmented electrodes 111. In addition, the number of segmented electrodes 111 on each pole 10 can be two, four, eight, ten, etc., which can be adjusted according to the model and specifications of the mass spectrometer, and the present application does not limit the number of segmented electrodes 111.

[0042] The segmented electrode 111 can be made of stainless steel or other conductive materials, or surface treated, such as gold plating or silver plating. Preferably, it can be stainless steel, which has strong corrosion resistance and conductivity, and improves the service life of the quadrupole assembly 100. The segmented electrode 111 is provided with a pin 1111, which can be welded to the segmented electrode 111. The pin 1111 can be made of stainless steel, or other conductive materials, or surface treated, such as gold plating or silver plating.

[0043] Furthermore, the pins 1111 on the multiple segmented electrodes 111 in the pole 10 are arranged side by side on the same side of the pole 10 and along the axial direction of the pole 10, and the pins 1111 extend radially along the corresponding segmented electrode 111. The quadrupole assembly 100 includes multiple poles 10. On the same pole 10, the pins 1111 of the multiple segmented electrodes 111 are arranged side by side on the same side of the pole 10 and along the axial direction of the pole 10, which can facilitate the installation of the pole 10 and the RF circuit board 20, improve the efficiency of assembly and maintenance, and when the quadrupole 10 is assembled, it is only necessary to insert the pins 1111 into the metal vias 211 of the RF circuit board 20 to complete the connection between the pole 10 and the RF circuit board 20, so that the assembly of the quadrupole assembly 100 is convenient, and the complicated wiring structure between the quadrupole assembly 100 and the RF circuit board 20 is avoided, so that the internal structure of the quadrupole assembly 100 is neat, and the reliability of electrical connection is improved.

[0044] Combination Figure 1 and Figure 3In some embodiments of the utility model, the segmented electrode 111 is electrically connected to the RF circuit board 20 through the metal via 211, which can reduce the risk of short circuit between adjacent segmented electrodes 111 and improve the safety performance of the quadrupole assembly 100. Specifically, the multiple metal vias 211 on the RF circuit board 20 are arranged at intervals, and the multiple metal vias 211 are insulated from each other, and the pins 1111 of the segmented electrode 111 are connected to the metal via 211, which can achieve electrical isolation between adjacent segmented electrodes 111, thereby avoiding short circuit between adjacent segmented electrodes 111 and improving the safety and reliability of the quadrupole assembly 100.

[0045] Furthermore, capacitors and resistors may be connected between multiple metal vias 211. Specifically, the pin 1111 is electrically connected to the metal via 211, and the metal via 211 is connected to the capacitor and resistor. Therefore, the connection between the segmented electrode 111 and the capacitor and resistor can be achieved, making the circuit connection structure of the quadrupole assembly 100 simple and avoiding connecting wires to each segmented electrode 111, which results in complex circuits inside the quadrupole assembly 100 and makes it difficult to install and maintain.

[0046] Among them, the spacing between the pins 1111 on the segmented electrodes 111 on the same pole 10 can be equal, and correspondingly, the spacing between the metal vias 211 on the RF circuit board 20 corresponding to the same pole 10 is also equal, and the number of segmented electrodes 111 corresponds to the number of metal vias 211. In this way, it is convenient to plug the pins 1111 on the pole 10 into the metal vias 211, which facilitates the assembly of the quadrupole assembly 100.

[0047] Combination Figure 1 In some embodiments of the utility model, the pole 10 further includes a support rod 112, and the segmented electrode 111 is constructed into a ring shape and is sleeved on the support rod 112. The support rod 112 can position and support the segmented electrode 111, thereby improving the structural strength and stability of the pole 10 and making the assembly of the pole 10 more convenient. In addition, an insulating ring 113 is provided between adjacent segmented electrodes 111. By providing the insulating ring 113, the insulation performance of adjacent segmented electrodes 111 is improved and the assembly is convenient. Among them, the insulating ring 113 can be a plastic ring, a ceramic ring, etc. Preferably, it can be a ceramic insulating ring 113, which has high insulation performance and aging resistance, thereby improving the reliability of the pole 10.

[0048] Furthermore, the quadrupole assembly 100 may include four support rods 112 of uniform size, and the four support rods 112 are symmetrically distributed around the ion channel, and a plurality of segmented electrodes 111 are sequentially inserted into each support rod 112 , and adjacent segmented electrodes 111 are separated by a ceramic insulating ring 113 , and conductive pins 1111 are welded on the segmented electrodes 111 .

[0049] Combination Figure 1 In some embodiments of the present invention, the plurality of poles 10 include a first pole 11, a second pole 12, a third pole 13 and a fourth pole 14, and the radio frequency circuit board 20 includes a first circuit board 21 and a second circuit board 22. The first pole 11, the second pole 12, the third pole 13 and the fourth pole 14 are arranged between the first circuit board 21 and the second circuit board 22, the first pole 11 and the second pole 12 are close to the first circuit board 21, and the pin 1111 of the first pole 11 and the pin 1111 of the second pole 12 are plugged into the first circuit board 21, the third pole 13 and the fourth pole 14 are close to the second circuit board 22, and the pin 1111 of the third pole 13 and the pin 1111 of the fourth pole 14 are plugged into the second circuit board 22. In other words, the multiple segmented electrodes 111 on the first pole 11 and the second pole 12 are all electrically connected to the first circuit board 21, and the multiple segmented electrodes 111 on the third pole 13 and the fourth pole 14 are all electrically connected to the second circuit board 22, so that the structure of the quadrupole assembly 100 is compact and convenient for installing the multiple poles 10 and the corresponding radio frequency circuit board 20. During installation, the pins 1111 on the first pole 11 and the second pole 12 can be plugged into the first radio frequency circuit board 20, and the pins 1111 on the third pole 13 and the fourth pole 14 can be plugged into the second circuit board 22. When the radio frequency circuit board 20 fails, the first circuit board 21 or the second circuit board 22 can be unplugged from the pole 10 and replaced with a new circuit board, thereby improving the convenience of maintenance of the ionization source 1000.

[0050] It should be noted that the first pole 11 and the second pole 12 are close to the first circuit board 21, which means that the first pole 11 and the second pole 12 are closer to the first circuit board 21 than the third pole 13 and the fourth pole 14, and the third pole 13 and the fourth pole 14 are close to the second circuit board 22, which means that the third pole 13 and the fourth pole 14 are closer to the second circuit board 22 than the first pole 11 and the second pole 12.

[0051] In addition, a plurality of segmented electrodes 111 are provided on the first pole 11, the second pole 12, the third pole 13 and the fourth pole 14. By providing a pin 1111 on the segmented electrode 111, providing a metal via 211 on the RF circuit board 20, and electrically connecting the pin 1111 with the metal via 211 to realize electrical connection between the segmented electrode 111 and the RF circuit board 20, an RF voltage and a DC voltage can be applied to each segmented electrode 111 through the RF circuit board 20, thereby avoiding connecting a complex wiring structure to each segmented electrode 111, simplifying the circuit structure inside the quadrupole assembly 100, and improving the reliability of the electrical performance.

[0052] In some embodiments of the utility model, one of the first circuit board 21 and the second circuit board 22 includes a power terminal 213, which can be provided on the first circuit board 21 or on the second circuit board 22. The power terminal 213 can be configured to connect voltage. By providing the power terminal 213, the connection of the RF circuit board 20 is facilitated and the reliability of the connection line is improved. The power terminal 213 can be a pin made of conductive material.

[0053] In addition, the first circuit board 21 and the second circuit board 22 are electrically connected so that after a voltage is connected to one circuit board, the other circuit board can also be connected to a corresponding voltage, which facilitates the application of voltages of equal amplitude to the first circuit board 21 and the second circuit board 22, and facilitates the wiring of the quadrupole assembly 100, thereby improving assembly efficiency and working stability.

[0054] The power supply terminals 213 may include four terminals, two of which may be configured to connect to a DC voltage, and the other two of which may be configured to connect to an RF voltage. Figure 1 and Figure 5 , the four power terminals 213 can be connected to the DC voltages V4 and V5 and the RF voltages RF+ and RF-, respectively. The RF+ and RF- voltages input into the first circuit board 21 can apply equal RF voltages to each segmented electrode 111 on the same pole 10, and apply RF voltages with opposite polarities and equal amplitudes to each segmented electrode 111 on the support rods 112 of adjacent segmented electrodes 111. In addition, taking the example of the power terminals 213 connected to the first circuit board 21, the first circuit board 21 and the second circuit board 22 are electrically connected, and the RF+ and RF- voltages apply the same RF voltage to the second circuit board 22 as to the first circuit board 21, so as to ensure that the RF voltages applied to each segmented electrode 111 on the support rods 112 of the alternate segmented electrodes 111 are equal. Specifically, the RF+ and RF- voltages input into the first circuit board 21 can apply RF voltages with opposite polarities and equal amplitudes to the segmented electrodes 111 on the first pole 11 and the second pole 12, and apply RF voltages with opposite polarities and equal amplitudes to the segmented electrodes 111 on the third pole 13 and the fourth pole 14. Figure 4 As shown, an RF-voltage may be applied to the first rod 11 and the fourth rod 14, and an RF+voltage may be applied to the second rod 12 and the third rod 13.

[0055] By arranging a plurality of segmented electrodes 111 on each quadrupole 10 and applying an alternating electric field of the quadrupole 10, sample molecules and reagent ions can collide and cool more frequently, thereby improving the ionization efficiency and transmission efficiency of the sample.

[0056] Furthermore, combined with Figure 1The first circuit board 21 and the second circuit board 22 can be electrically connected through the flat cable 214, for example, through the FPC soft flat cable, preferably with a higher withstand voltage value, such as a withstand voltage value of 600V, which can improve the reliability of the RF circuit board 20. Among them, the RF+ and RF- voltages can be applied to the second circuit board 22 through the FPC soft flat cable. The same RF voltage as the first circuit board 21 is applied to ensure that the RF voltages applied to each segment electrode 111 on the alternate pole 10 are equal.

[0057] In some embodiments of the present invention, the pins 1111 on the first pole 11 and the second pole 12 are oriented in the same direction and toward the first circuit board 21; the pins 1111 on the third pole 13 and the fourth pole 14 are oriented in the same direction and toward the second circuit board 22. In this way, the pins 1111 on the first pole 11 and the second pole 12 can be plugged into the first circuit board 21, and the pins 1111 on the third pole 13 and the fourth pole 14 can be plugged into the second circuit board 22, which simplifies the installation method of the quadrupole assembly 100 and improves the installation efficiency.

[0058] In some embodiments of the present invention, capacitors and resistors are connected between the plurality of metal vias 211. Figure 5 , resistors and capacitors may be welded on the RF circuit board 20, each metal via 211 is connected to a capacitor of equal capacitance, and adjacent metal vias 211 may be connected through resistors of equal resistance. For example, the resistance value of the resistor is 1MΩ, and the capacitance value of the capacitor is 10nF.

[0059] To achieve Figure 4 The resistor and capacitor connections between the segmented electrodes 111 shown in the figure, two identical RF circuit boards 20 can be arranged in the quadrupole assembly 100, and the corresponding positions of the RF circuit boards 20 have metal vias 211 equal to the number of the segmented electrodes 111, combined with Figure 3 , the spacing between adjacent metal vias 211 is equal, which can be Figure 1 The pins 1111 on the segmented electrodes 111 on the pole 10 on the same side are plugged into each other, resistors and capacitors are welded on the RF circuit board 20, each metal via 211 is connected to a capacitor of equal capacitance, and adjacent metal vias 211 are connected through resistors of equal resistance.

[0060] The ionization source 1000 according to the embodiment of the present invention may include the aforementioned quadrupole assembly 100 .

[0061] Combination Figure 5 and Figure 6The ionization source 1000 may further include a housing 300, which can provide a stable working environment for the ionization source 1000 to ensure parameters such as temperature, pressure, and electric field during the ionization process to avoid external interference. The housing 300 may have an ionization source chamber 310 and an injection channel 320, the quadrupole assembly 100 may be disposed in the ionization source chamber 310, and the injection channel 320 may be configured to introduce a sample to be analyzed.

[0062] One side of the shell 300 may have an opening, and the ionization source 1000 may also include an ultraviolet lamp assembly 400, which is connected to the shell 300 and opposite to the opening. The ultraviolet lamp assembly 400 can emit ultraviolet light to promote single-photon ionization of the sample to be analyzed, and the ultraviolet lamp assembly 400 can seal the opening to maintain the sealing of the ionization source chamber 310.

[0063] The ionization source 1000 may further include a repeller electrode 500, which is disposed in the housing 300 and opposite to the opening. The repeller electrode 500 may be configured to guide sample ions and reagent ions into the quadrupole assembly 100, and provide a kinetic energy to push the ions forward. Specifically, the repeller electrode 500 and the ultraviolet lamp assembly 400 may be disposed on opposite sides of the opening, and the ions ionized by the ultraviolet lamp 420 may enter the quadrupole assembly 100 under the action of the repeller electrode 500.

[0064] The ultraviolet lamp 420 may be a vacuum ultraviolet lamp 420, which can softly ionize organic molecules with an ionization energy lower than 10.6 eV. The ultraviolet lamp 420 is small in size, has a high molecular ion yield, and has a simple spectrum, and is suitable for qualitative and quantitative analysis of complex substances when combined with a mass spectrometer.

[0065] Furthermore, the ultraviolet lamp assembly 400 may include a lampshade 410, which covers the opening and is detachably connected to the housing 300, so that when the ultraviolet lamp 420 fails, the lampshade 410 can be removed to replace the ultraviolet lamp 420, and the lampshade 410 covers the opening, which can ensure the sealing performance in the housing 300. The lampshade 410 and the housing 300 can be threadedly connected, and when the ultraviolet lamp 420 needs to be replaced, it only needs to be unscrewed from the housing 300 to replace it, thereby improving the convenience of replacing the ultraviolet lamp 420.

[0066] Combination Figure 5 and 7The ultraviolet lamp 420 has a first end 421 and a second end 422 that are opposite to each other in the axial direction of the ultraviolet lamp 420. The first end 421 is farther away from the repelling electrode 500 than the second end 422. The ultraviolet lamp assembly 400 may further include an elastic member 430. The elastic member 430 is connected to the lampshade 410 and the first end 421 of the ultraviolet lamp 420, and the elastic member 430 is electrically connected to the first end 421 of the ultraviolet lamp 420. The elastic member 430 has an elastic force that presses the ultraviolet lamp 420 toward the repelling electrode 500. The second end 422 of the ultraviolet lamp 420 abuts against and is electrically connected to the first electrode 510 of the repelling electrode 500. In other words, the ultraviolet lamp 420 is installed between the lampshade 410 and the repelling electrode 500 by the elastic force of the elastic member 430, and the first end 421 and the second end 422 of the ultraviolet lamp 420 are both electrically connected. The assembly and electrical connection structure of the ultraviolet lamp 420 are simple. When the ultraviolet lamp 420 fails or reaches the end of its service life, the ultraviolet lamp 420 cover 410 can be removed and the ultraviolet lamp 420 can be directly replaced. In the related art, the ultraviolet lamp 420 is electrically connected by welding wires on the positive and negative electrodes. When replacing the vacuum ultraviolet lamp 420, it is necessary to use an electric soldering iron to remove the original wires from the ultraviolet lamp 420, replace it with a new ultraviolet lamp 420, and weld the wires to the new ultraviolet lamp 420, resulting in a complicated and cumbersome replacement process of the ultraviolet lamp 420. Different from the related art, one end of the ultraviolet lamp 420 in the ionization source 1000 of the embodiment of the utility model is connected to electricity through the elastic member 430, and the other end applies an elastic force to press toward the repelling electrode 500 through the elastic member 430 and is electrically connected to the first electrode 510 of the repelling electrode 500, which effectively improves the convenience of maintenance of the ionization source 1000.

[0067] The elastic member 430 may be a conductive spring, which is convenient for assembly and can save costs. One end of the spring may abut against the lampshade 410, and the other end abuts against one end of the ultraviolet lamp 420, and has an elastic force to press the ultraviolet lamp 420 toward the repelling electrode 500. A part of the ultraviolet lamp 420 is inserted into the spring, and the spring abuts against the first end 421 of the ultraviolet lamp 420, so that the connection structure between the ultraviolet lamp 420 and the spring is stable, and after the lampshade 410 is disassembled, the ultraviolet lamp 420 can be directly disassembled because one end of the spring loses the abutting force, and no other actions are required, thereby improving the convenience of maintaining the ionization source 1000.

[0068] Specifically, combined Figure 5 and Figure 7The first end 421 of the ultraviolet lamp 420 can be a positive electrode, and the second end 422 of the ultraviolet lamp 420 can be a negative electrode. That is, the spring is in contact with the positive electrode of the ultraviolet lamp 420, and the end of the spring can be connected to a V0 voltage by welding a wire, and the first electrode 510 of the repelling electrode 500 can be connected to a V1 voltage. The negative electrode of the ultraviolet lamp 420 can be connected to the V1 voltage of the first electrode 510, and the ultraviolet lamp 420 can achieve a conductive connection without welding wires.

[0069] Combination Figure 5 In some embodiments of the present invention, the repelling electrode 500 may include a first electrode 510 and a second electrode 520, which are arranged along the axis of the vacuum ultraviolet lamp 420, and one end of the injection channel 320 is located between the first electrode 510 and the second electrode 520, which can provide kinetic energy to push the ions forward and accelerate the ions to move into the quadrupole assembly 100. The first electrode 510 and the second electrode 520 may be connected to a voltage, combined with Figure 5 The first electrode 510 may be connected to a voltage V1, and the second electrode 520 may be connected to a voltage V2. By adjusting the voltage of the repeller electrode 500, the acceleration and speed of the ions may be controlled.

[0070] Optionally, the ionization source 1000 may be a chemical ionization source 1000, the injection channel 320 may include a reagent gas injection channel 320 and a sample gas injection channel 320, and the ultraviolet lamp 420 can be combined with the chemical ionization to generate, for example, O2 + or NO + The reagent ions react with the sample to be tested to produce ion-molecule reactions, so that samples with ionization energy higher than the photon energy can also be ionized.

[0071] Furthermore, the cooperation of the vacuum ultraviolet lamp 420 , chemical ionization and the quadrupole assembly 100 in the ionization source 1000 can increase the detection range and ionization efficiency of the sample and improve the ion transmission efficiency.

[0072] Combination Figure 5 and Figure 6 In some embodiments of the present invention, the ionization source 1000 may further include a differential electrode 600. In the axial direction of the ultraviolet lamp 420, the ultraviolet lamp assembly 400, the repelling electrode 500, the quadrupole assembly 100 and the differential electrode 600 are sequentially arranged in the axial direction of the vacuum ultraviolet lamp 420. The differential electrode 600 may be made of metal and have a conical structure, and an ion transmission outlet 610 is provided in the middle. The differential electrode 600 may be connected to a V3 voltage.

[0073] The mass spectrometer according to the embodiment of the utility model includes the aforementioned ionization 1000. By setting the aforementioned ionization source 1000, the problem of complex internal wiring of the quadrupole assembly 100 is solved, the reliability of the ionization source 1000 is improved, the failure rate of the mass spectrometer is reduced, and the later maintenance of the mass spectrometer is convenient.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A quadrupole assembly (100), characterized in that: include: A plurality of poles (10), the plurality of poles (10) being arranged around the ion channel, the poles (10) comprising a plurality of segmented electrodes (111) insulated from each other, the segmented electrodes (111) being provided with pins (1111); A radio frequency circuit board (20), wherein the radio frequency circuit board (20) is provided with a metal via (211) corresponding to the plug pin (1111), the plug pin (1111) is plugged into the corresponding metal via (211) and is electrically connected to the radio frequency circuit board (20), and capacitors and resistors are connected between a plurality of the metal vias (211).

2. The quadrupole assembly (100) according to claim 1, characterized in that: The pins (1111) on the plurality of segmented electrodes (111) in the pole (10) are arranged side by side on the same side of the pole (10) and along the axial direction of the pole (10), and the pins (1111) extend along the radial direction of the corresponding segmented electrode (111).

3. The quadrupole assembly (100) according to claim 1, characterized in that: The pole (10) further comprises a support rod (112), the segmented electrode (111) is constructed in a ring shape and sleeved on the support rod (112), and an insulating ring (113) is provided between adjacent segmented electrodes (111).

4. The quadrupole assembly (100) according to claim 1, characterized in that: The plurality of poles (10) include a first pole (11), a second pole (12), a third pole (13) and a fourth pole (14); the radio frequency circuit board (20) includes a first circuit board (21) and a second circuit board (22); the first pole (11), the second pole (12), the third pole (13) and the fourth pole (14) are arranged between the first circuit board (21) and the second circuit board (22); the first pole (11) and the second pole (12) are close to the first circuit board (21); the pin (1111) of the first pole (11) and the pin (1111) of the second pole (12) are plugged into the first circuit board (21); the third pole (13) and the fourth pole (14) are close to the second circuit board (22); the pin (1111) of the third pole (13) and the pin (1111) of the fourth pole (14) are plugged into the second circuit board (22).

5. The quadrupole assembly (100) according to claim 4, characterized in that: One of the first circuit board (21) and the second circuit board (22) comprises a power terminal (213), and the first circuit board (21) and the second circuit board (22) are electrically connected.

6. The quadrupole assembly (100) according to claim 4, characterized in that: The pins (1111) on the first pole (11) and the second pole (12) are oriented in the same direction and face the first circuit board (21); the pins (1111) on the third pole (13) and the fourth pole (14) are oriented in the same direction and face the second circuit board (22).

7. An ionization source (1000), characterized in that include: A housing (300), wherein the housing (300) has an ionization source chamber (310) and an injection channel (320), and one side of the housing (300) has an opening; An ultraviolet lamp assembly (400), the ultraviolet lamp assembly (400) being connected to the housing (300) and facing the opening; a repelling electrode (500), the repelling electrode (500) being arranged in the housing (300) and facing the opening; The quadrupole assembly (100) according to any one of claims 1 to 6, wherein the quadrupole assembly (100) is disposed in the housing (300). The ultraviolet lamp assembly (400), the repeller electrode (500) and the quadrupole assembly (100) are sequentially arranged in the axial direction of the vacuum ultraviolet lamp (420).

8. The ionization source (1000) according to claim 7, characterized in that The ultraviolet lamp assembly (400) comprises: A lampshade (410), the lampshade (410) covers the opening and is detachably connected to the housing (300); an ultraviolet lamp (420), the ultraviolet lamp (420) having a first end (421) and a second end (422) opposite to each other in the axial direction of the vacuum ultraviolet lamp (420), the first end (421) being farther away from the repelling electrode (500) than the second end (422); An elastic member (430) is connected and electrically connected to the lampshade (410) and the first end (421) of the ultraviolet lamp (420), and has an elastic force for pressing the ultraviolet lamp (420) toward the repelling electrode (500); the second end (422) of the ultraviolet lamp (420) abuts against and is electrically connected to the repelling electrode (500).

9. The ionization source (1000) according to claim 8, characterized in that The repelling electrode (500) comprises a first electrode (510) and a second electrode (520), wherein the first electrode (510) and the second electrode (520) are arranged along the axial direction of the vacuum ultraviolet lamp (420), and one end of the injection channel (320) is located between the first electrode (510) and the second electrode (520).

10. A mass spectrometer, characterized in that: An ionization source (1000) comprising any one of claims 7-9.

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