CN211743093U

CN211743093U - Mass spectrometer

Info

Publication number: CN211743093U
Application number: CN202020874571.9U
Authority: CN
Inventors: 钟志松; 焦青
Original assignee: Chengdu Harmony Health Medical Laboratory Co ltd
Current assignee: Chengdu Harmony Health Medical Laboratory Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-10-23
Anticipated expiration: 2030-05-22

Abstract

The utility model relates to a mass spectrometer, which comprises an ion sample introduction tube for impacting a substance to be detected into ions and an accelerating electrode arranged in the ion sample introduction tube, wherein an ion source and an electron flow are input at two sides of the ion sample introduction tube, and a focusing slit is formed at the tail end of the ion sample introduction tube; the end of the metal analysis tube is connected with an ion trap, an amplifier connected with the ion trap and a recorder connected with the amplifier; the metal analysis tube comprises an even number of multipole rods and a common rail rod made of insulating materials, the multipole rods are symmetrically distributed on the side wall of the common rail rod, and the multipole rods are communicated with the side wall of the common rail rod.

Description

Mass spectrometer

Technical Field

The utility model relates to a detection area, concretely relates to mass spectrometer.

Background

Mass spectrometers are also known as mass spectrometers. Apparatus for separating and detecting different isotopes. That is, based on the principle that charged particles can deflect in an electromagnetic field, the instrument separates and detects the composition of substances according to the mass difference of substance atoms, molecules or molecular fragments. Mass spectrometers are divided into isotope mass spectrometers, inorganic mass spectrometers and organic mass spectrometers in terms of the range of applications. The method is divided into a high-resolution mass spectrometer, a medium-resolution mass spectrometer and a low-resolution mass spectrometer according to the resolution capability, and is divided into a static instrument and a dynamic instrument according to the working principle. As shown in fig. 1, the mass spectrometer is a structural schematic diagram of a conventional mass spectrometer, and mainly comprises an ion beam accelerating tube 1, a deflecting magnetic field 2, an ion trap 3, an amplifier 4 and a recorder 5, wherein sample ions are gasified and ionized into ion beams in the ion sampling tube 1, accelerated and focused by voltage, and then the ions with different masses are deflected by different magnetic fields and electric fields through the deflecting magnetic field 2, and focused at different positions, so as to obtain mass spectra of different isotopes. In the whole motion track, the ions complete the motion through the metal analysis tube. The traditional metal analysis tube is a single tube, and in order to meet market demands, various forms such as quadrupole rods, octupole rods and the like have appeared in the market at present. No matter there is a common defect in multipole pole and monopole pole, the terminal surface of pole is generally designed for circularly, and ion is at the motion in-process, and the ion route that weight is big is located the pipe lower part, and light being located upper portion, will strike at the pipe wall when ion weight is big enough by the effect of magnetic force to can't gather corresponding movement track at the end, lead to the analysis result to appear omitting, data is incomplete.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a mass spectrometer, through adding a rail pole altogether that is made by insulating material in the centre at the multipole pole, the rail pole altogether and multipole pole follow passageway each other on the ion motion direction route to widen the cross section of single analysis pole, thereby can make ion trap catch the ion movement track of completion.

The purpose of the utility model is realized through the following technical scheme:

a mass spectrometer, comprising:

the ion source and the electron flow are input to two sides of the ion sampling tube, and a focusing slit is formed at the tail end of the ion sampling tube;

the end of the metal analysis tube is connected with an ion trap, an amplifier connected with the ion trap and a recorder connected with the amplifier;

the metal analysis tube comprises an even number of multi-pole rods and a common rail rod made of insulating materials, the multi-pole rods are symmetrically distributed on the side wall of the common rail rod, and the multi-pole rods are communicated with the side wall of the common rail rod.

Compare with traditional mass spectrograph, this scheme has added a and has shared rail pole with multipole pole intercommunication each other between the multipole pole to increased the space region of each monopole pole, in the testing process, if great ion fluctuation appears, its movement track just can get into in the shared rail pole, can not clash at the lateral wall, thereby makes ion trap can catch complete movement track.

Furthermore, four multipole rods are symmetrically distributed on the upper, lower, left and right side walls of the common rail rod, and the multipole rods and the common rail rod are equally and parallelly distributed. The design is mainly based on the corresponding improvement of the distribution of the four-stage rods, when the design is an eight-pole rod, the distribution is similar, and the multi-pole rods are distributed outside the common rail rod in a ring-shaped symmetrical distribution mode.

Furthermore, the multipole rods are identical in size, and the diameters of the common rail rods and the multipole rods are identical.

Furthermore, the two ends of the multi-pole rod and the two ends of the common rail rod are fixed through flanges.

Further, the deflecting magnetic field of the metal analysis tube is an electromagnetic field.

The utility model has the advantages that: compared with the prior art, the function of the multipole rod in the scheme is completely the same as that of the conventional design, and the difference is that the common rail rod made of an insulating material is added, so that the original characteristic of the multipole rod cannot be influenced by the addition of the common rail rod, but the longitudinal or transverse motion space of internal ions of the multipole rod is increased, the motion track of the ions can be completely captured, and the accuracy and the integrity of analysis are improved.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the structure of the metal analysis tube of the present invention;

fig. 4 is a schematic view of the end surface of the metal analysis tube of the present invention.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 2, a mass spectrometer comprises: the ion sampling device comprises an ion sampling tube 1 for impacting a substance to be detected into ions and an accelerating electrode 6 arranged in the ion sampling tube 1, wherein an ion source and an electron flow are input into two sides of the ion sampling tube 1, the scheme is basically consistent with the prior art in the design, and as shown in a figure 1, the electron flow is fed by an upper wall branch tube 7 of the ion sampling tube 1, the lower wall is used for generating the ion source, and a sample enters from the front end of the ion sampling tube 1. The tail end of the ion sample introduction tube 1 forms a focusing slit; a metal analysis tube 8 abutting against the focusing slit, the end of the metal analysis tube 8 being connected to the ion trap 3, and an amplifier 4 connected to the ion trap 3, and a recorder 5 connected to the amplifier 4. In order to realize the complete motion trajectory of capturing ions, on one hand, the present embodiment modifies the structure of the multipole rod, that is, the metal analysis tube 8, and the modified metal analysis tube 8 includes an even number of multipole rods 81 and a common rail rod 82 made of an insulating material, wherein the multipole rod 81 preferably adopts a structure of a currently mature quadrupole rod or an eight-pole rod, and the quadrupole rod is taken as an example in the present embodiment. Referring to fig. 3 and 4, four multi-pole rods 81 are symmetrically distributed on the side wall of a common rail rod 82, each multi-pole rod 81 is in communication with the side wall of the common rail rod 82, the common rail rod 82 is essentially a connecting part between two adjacent multi-pole rods 81 and is made of an insulating material, and the shape of the common rail rod 82 can be referred to as a dotted line in fig. 3. More specifically, four multi-pole rods 81 are symmetrically distributed on the upper, lower, left and right side walls of the common rail rod 82, and the multi-pole rods 81 and the common rail rod 82 are equally and parallelly distributed. The multipole rods 81 are all the same size and the common rail rod 82 is the same diameter as the multipole rod 81. The pole 81 and the common rail 82 are fixed at both ends by flanges. Finally, in this embodiment, the deflecting magnetic field of the metal analysis tube 8 is an electromagnetic field, and the power supply line thereof can be referred to as shown in fig. 3, wherein the left and right multi-pole rods 81 are connected to the positive electrode of the power supply, and the upper and lower multi-pole rods 81 are connected to the negative electrode of the power supply.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A mass spectrometer, comprising:

the ion source device comprises an ion sampling tube (1) for impacting a substance to be detected into ions and an accelerating electrode (6) arranged in the ion sampling tube (1), wherein an ion source and an electron flow are input to two sides of the ion sampling tube (1), and a focusing slit is formed at the tail end of the ion sampling tube (1);

a metal analysis tube (8) butted with the focusing slit, wherein the tail end of the metal analysis tube (8) is connected with the ion catcher (3), an amplifier (4) connected with the ion catcher (3), and a recorder (5) connected with the amplifier (4);

the metal analysis tube (8) comprises an even number of multi-pole rods (81) and a common rail rod (82) made of an insulating material, the multi-pole rods (81) are symmetrically distributed on the side wall of the common rail rod (82), and the multi-pole rods (81) are communicated with the side wall of the common rail rod (82).

2. A mass spectrometer according to claim 1, characterised in that the number of the multipole rods (81) is four, and the four multipole rods are symmetrically arranged on the upper, lower, left and right side walls of the common rail rod (82), and the multipole rods (81) and the common rail rod (82) are arranged in equal length and in parallel.

3. A mass spectrometer according to claim 2, characterised in that the multipole rods (81) are of identical dimensions and the common rail rod (82) is of the same diameter as the multipole rod (81).

4. A mass spectrometer according to claim 1, characterised in that the multipole (81) and the common rail (82) are flanged at both ends.

5. A mass spectrometer according to claim 1, characterised in that the deflecting magnetic field of the metal analysis tube (8) is an electromagnetic field.