CN216015292U - High-sample-utilization-rate ion source device for mass spectrometer - Google Patents
High-sample-utilization-rate ion source device for mass spectrometer Download PDFInfo
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- CN216015292U CN216015292U CN202122367020.0U CN202122367020U CN216015292U CN 216015292 U CN216015292 U CN 216015292U CN 202122367020 U CN202122367020 U CN 202122367020U CN 216015292 U CN216015292 U CN 216015292U
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- ion source
- sample injection
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Abstract
The utility model discloses a high sample utilization rate ion source device for mass spectrometer, including heating flange, heating member, heat conduction piece, ion source, heating pipeline, advance kind capillary, sealing washer, shutoff head. The heating flange comprises a heating part and a sample injection part, the heating part is horizontally arranged, the sample injection part is perpendicular to one end of the heating part, a mounting hole is formed in the heating part along the horizontal direction and used for mounting a heating body, one end of the heating body is communicated with the external atmosphere, a heat conduction block is arranged on the upper surface of the heating part, and the ion source is mounted on the heat conduction block. The heating pipeline comprises a first heating pipe, a second heating pipe and a heating wire, the first heating pipe is arranged on the outer side of the upper end of the sample injection part and is provided with an axial through hole for the second heating pipe to pass through, the sample injection capillary tube is wound by the heating wire and penetrates through the second heating pipe and then extends into the ion source, and the sample injection capillary tube and the ion source are arranged coaxially. The first heating pipe is connected with the sample injection part in a sealing way through a sealing ring, and the sample injection end of the second heating pipe is sealed through a plugging head.
Description
Technical Field
The utility model relates to a mass spectrograph ion source technical field especially relates to a high sample utilization rate ion source device for mass spectrometer instrument.
Background
The fields of material science, environmental science, surface science, criminal analysis and the like often need to detect trace samples, and common trace detection methods comprise an electrochemical method, a spectroscopic method and a mass spectrometry method. The mass spectrometry method is widely applied to analysis and detection of trace and ultra-trace substances due to ultrahigh sensitivity and accuracy, and the detection limit can be below 1pg/ul by taking the application of a gas chromatography-mass spectrometer in environmental detection as an example. One important factor in mass spectrometry that determines the level of sensitivity is the rate at which a sample entering the ionization chamber is ionized, which may be referred to as sample utilization. Since the mass spectrometer is operated in a medium and high vacuum environment, the sample immediately diffuses into the whole vacuum chamber when entering the vacuum environment, and only a small part of the sample is detected to diffuse into the ionization chamber. How to ionize the sample before diffusing in vacuum is the key to improve the utilization rate of the sample.
Separation and enrichment of trace components is often essential to enhance the ability to detect trace components and to remove substantial interference, and common methods of separation and enrichment are volatilization, precipitation, electrolysis, liquid-liquid extraction, ion exchange, chromatography, extraction chromatography, electrophoresis, and the like. Although the enrichment process of the pre-treated sample is long and complicated, the enrichment process is indispensable to most of trace detection. If the sample utilization rate reaches a certain height, a direct sample introduction mode can be adopted on the premise of ensuring that the detection limit is not changed, the pretreatment process is omitted, and the analysis and detection speed is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing the ion source device with high sample utilization rate for the mass spectrometer.
In order to achieve the above object, the utility model provides a following technical scheme:
an ion source device with high sample utilization rate for a mass spectrometer comprises a heating flange, a heating body, a heat conducting block, an ion source, a heating pipeline, a sample injection capillary tube, a sealing ring and a plugging head;
the heating flange comprises a heating part and a sample injection part, the heating part is horizontally arranged, the sample injection part is perpendicular to one end of the heating part, a mounting hole is formed in the heating part along the horizontal direction and used for mounting the heating body, one end of the heating body is communicated with the external atmosphere, the heat conduction block is arranged on the upper surface of the heating part, and the ion source is mounted on the heat conduction block;
the heating pipeline comprises a first heating pipe, a second heating pipe and a heating wire, the first heating pipe is arranged on the outer side of the upper end of the sample injection part and is provided with an axial through hole for the second heating pipe to pass through, the sample injection capillary tube is wound by the heating wire and penetrates through the second heating pipe to extend into the ion source, and the sample injection capillary tube and the ion source are coaxially arranged;
the first heating pipe with advance between the kind portion by sealing washer sealing connection, the kind end of second heating pipe by the shutoff head is sealed.
Furthermore, a power supply circuit and a control circuit are arranged in the first heating pipe, two ends of the heating wire are connected with the power supply circuit, and the control circuit controls the switch of the power supply circuit.
Furthermore, the sealing mode between the heating pipeline and the heating flange and between the heating pipeline and the sample injection capillary is vacuum sealing.
Further, the ion source comprises a shielding cylinder, a ceramic lead base arranged at one end of the shielding cylinder, a pull-out polar plate arranged on the inner side of the ceramic lead base, a grounding polar plate arranged at the other end of the shielding cylinder, and an ion lens group arranged between the pull-out polar plate and the grounding polar plate, wherein inert metal is electroplated on the surfaces of the pull-out polar plate and the grounding polar plate.
Further, the material of the heat conduction block is one of ceramic, Polyimide (PI), polytetrafluoroethylene (TEFLON) and polyether ether ketone (PEEK).
Furthermore, the sample injection capillary is a quartz capillary or a stainless steel capillary.
Further, the first heating pipe and the second heating pipe are welded in a vacuum sealing mode.
Further, the heating wire is made of tungsten filaments.
The utility model has the advantages that:
the utility model provides a high sample utilization rate ion source device for mass spectrum instrument, in the heating flange was arranged in to the heating member, nevertheless not continuous with the vacuum, the heat conduction piece was between heating flange and ion source, played voltage isolation and heat-conducting effect. The heating pipeline is vacuum-sealed through a sealing ring and a sealing plug. The sample injection capillary and the ion source are coaxial, and the sample injection capillary extends into the ion source, so that the sample injection capillary is ionized to the maximum extent before vacuum diffusion, and the utilization rate of a sample is improved.
Drawings
Fig. 1 is a schematic structural diagram of an ion source apparatus with high sample utilization rate for a mass spectrometer according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an ion source apparatus with high sample utilization rate for a mass spectrometer according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", "one side", "the other side", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "connected", and the like are to be construed broadly, such as "connected", may be fixedly connected, or detachably connected or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood in specific cases by those skilled in the art.
The following describes the present invention in detail with reference to the examples.
Referring to fig. 1-2, according to an embodiment of the present invention, an ion source device with high sample utilization rate for a mass spectrometer is provided, which includes a heating flange 1, a heating body 2, a heat conduction block 3, an ion source 4, a heating pipeline 5, a sample injection capillary 6, a sealing ring 7, and a plugging head 8. The heating flange 1 comprises a heating part 11 which is horizontally arranged and a sample injection part 12 which is vertical to one end of the heating part 11. A mounting hole is formed in the heating part 11 along the horizontal direction for mounting the heating body 2, and one end of the heating body 2 is communicated with the external atmosphere. The heat conducting block 3 is disposed on the upper surface of the heating part 11, and the ion source 4 is mounted on the heat conducting block 3. The heating line 5 includes a first heating pipe 51, a second heating pipe 52, and a heating wire 53. The first heating pipe 51 is disposed at the outer side of the upper end of the sample injection part 12 and is provided with an axial through hole for the second heating pipe 52 to pass through. The sample introduction capillary 6 is wound by the heating wire 53 and penetrates through the second heating pipe 52 and then extends into the ion source 4, and the sample introduction capillary 6 and the ion source 4 are coaxially arranged. The first heating pipe 51 and the sample injection part 12 are connected in a sealing manner through the sealing ring 7, and the sample injection end of the second heating pipe 52 is sealed through the plugging head 8. The device integrates an ion source 4 and a heating pipeline 5 on a heating flange 1, can be directly connected into a mass spectrum cavity, and is convenient to operate and simple to disassemble. The heat conducting block 3 is arranged between the ion source 4 and the heating flange 1 and plays a role in conducting heat and isolating voltage. Meanwhile, the heating body 2 is arranged in the heating flange 1 and communicated with the external atmosphere, and is not connected with the mass spectrum in vacuum. Heating body 2 can heat heating flange 1 through the control of temperature controller, and heating flange 1 gives the ion lens group of ion source 4 with heat transfer, and heating body 2 is kept apart with the vacuum, and the volatile substance in the heating body can not pollute the vacuum in the heating process.
According to the utility model discloses an embodiment, set up power supply circuit and control circuit in the first heating pipe 51, heater strip 53 both ends are connected power supply circuit, control circuit control power supply circuit's switch. The sealing mode between the heating pipeline 5 and the heating flange 1, and between the heating pipeline 5 and the sample injection capillary 6 is vacuum sealing.
According to the utility model discloses an embodiment, ion source 4 can include shielding section of thick bamboo 41, set up in the ceramic lead wire base 42 of shielding section of thick bamboo 41 one end, set up in the inboard pull-out polar plate 43 of ceramic lead wire base 42, set up in the ground connection polar plate 44 of the shielding section of thick bamboo 41 other end, set up the ion lens group 45 between pull-out polar plate 43 and ground connection polar plate 44, pull-out polar plate 43 and ground connection polar plate 44 surface plating inert metal. The surface of the ion source 4 electrode adopts an inert metal electroplating process, so that the pollution resistance of the electrode can be improved. The sample introduction capillary 6 extends into the ion source 4, specifically, between the electrode lead wires of the ceramic lead wire base 42.
According to an embodiment of the present invention, the material of the heat conducting block 3 may be one of ceramic, Polyimide (PI), polytetrafluoroethylene (TEFLON), and polyether ether ketone (PEEK).
According to an embodiment of the present invention, the sample injection capillary 6 is a quartz capillary or a stainless steel capillary.
According to an embodiment of the present invention, the first heating pipe 51 and the second heating pipe 52 are welded by vacuum sealing.
According to an embodiment of the present invention, the material of the heating wire 53 may be tungsten wire.
The utility model discloses a can directly follow the atmospheric pressure sampling and let in the mass spectrum ion source into advance the appearance capillary, the sample furthest by the ionization, has higher sample utilization ratio, is fit for measuring the analysis and the detection of sample. The whole section area of the sample injection capillary is wrapped in the heating pipeline, so that a high boiling point sample is prevented from being condensed in the capillary in the sample injection process.
The embodiments in the above embodiments can be further combined or replaced, and the embodiments are only described in the preferred embodiments of the present invention, which are not limited to the concept and scope of the present invention, and various changes and modifications made by the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention all belong to the protection scope of the present invention.
Claims (8)
1. An ion source device with high sample utilization rate for a mass spectrometer is characterized by comprising a heating flange, a heating body, a heat conduction block, an ion source, a heating pipeline, a sample injection capillary tube, a sealing ring and a plugging head;
the heating flange comprises a heating part and a sample injection part, the heating part is horizontally arranged, the sample injection part is perpendicular to one end of the heating part, a mounting hole is formed in the heating part along the horizontal direction and used for mounting the heating body, one end of the heating body is communicated with the external atmosphere, the heat conduction block is arranged on the upper surface of the heating part, and the ion source is mounted on the heat conduction block;
the heating pipeline comprises a first heating pipe, a second heating pipe and a heating wire, the first heating pipe is arranged on the outer side of the upper end of the sample injection part and is provided with an axial through hole for the second heating pipe to pass through, the sample injection capillary tube is wound by the heating wire and penetrates through the second heating pipe to extend into the ion source, and the sample injection capillary tube and the ion source are coaxially arranged;
the first heating pipe with advance between the kind portion by sealing washer sealing connection, the kind end of second heating pipe by the shutoff head is sealed.
2. The ion source device of claim 1, wherein a power circuit and a control circuit are disposed in the first heating tube, two ends of the heating wire are connected to the power circuit, and the control circuit controls a switch of the power circuit.
3. The ion source apparatus of claim 2, wherein the sealing between the heating line and the heating flange, and between the heating line and the sample capillary are vacuum seals.
4. The ion source device of claim 3, wherein the ion source comprises a shielding cylinder, a ceramic lead base disposed at one end of the shielding cylinder, a pull-out electrode plate disposed inside the ceramic lead base, a grounding electrode plate disposed at the other end of the shielding cylinder, and an ion lens set disposed between the pull-out electrode plate and the grounding electrode plate, and the surfaces of the pull-out electrode plate and the grounding electrode plate are plated with inert metal.
5. The ion source apparatus of claim 4, wherein the material of the thermal block is one of ceramic, Polyimide (PI), polytetrafluoroethylene (TEFLON), and Polyetheretherketone (PEEK).
6. The ion source apparatus of claim 5, wherein the sample capillary is a quartz capillary or a stainless steel capillary.
7. The ion source apparatus of claim 6, wherein the first heating tube and the second heating tube are vacuum sealed and welded.
8. The ion source apparatus of claim 7, wherein the heating wire is made of tungsten wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122367020.0U CN216015292U (en) | 2021-09-28 | 2021-09-28 | High-sample-utilization-rate ion source device for mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122367020.0U CN216015292U (en) | 2021-09-28 | 2021-09-28 | High-sample-utilization-rate ion source device for mass spectrometer |
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| Publication Number | Publication Date |
|---|---|
| CN216015292U true CN216015292U (en) | 2022-03-11 |
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| CN202122367020.0U Active CN216015292U (en) | 2021-09-28 | 2021-09-28 | High-sample-utilization-rate ion source device for mass spectrometer |
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| CN (1) | CN216015292U (en) |
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2021
- 2021-09-28 CN CN202122367020.0U patent/CN216015292U/en active Active
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