CN111199868B - Micro-array ion migration tube - Google Patents
Micro-array ion migration tube Download PDFInfo
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- CN111199868B CN111199868B CN201811381274.4A CN201811381274A CN111199868B CN 111199868 B CN111199868 B CN 111199868B CN 201811381274 A CN201811381274 A CN 201811381274A CN 111199868 B CN111199868 B CN 111199868B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
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Abstract
The invention designs a micro-array ion migration tube and considers the miniaturization. The array ion migration tube is provided with independent ionization sources, reaction regions, ion gates, migration regions and signal detection units, ions in two modes or ions in different ionization sources are not interfered with each other and work independently, and stability of detection signals is guaranteed. The electrodes of the reaction zone and the migration zone are composed of an upper electrode plate, a lower electrode plate and an electrode bar, the migration tube is more compact, and the upper electrode plate is distributed with a voltage dividing resistor for forming a migration electric field, so that the volume of the migration tube is reduced. The two ion migration tubes share air inlet and air floating, so that an air supply system of the ion migration spectrum is simplified; and the single migration pipe body is shared, so that the connectivity and the sealing performance of the migration pipe are ensured. Other areas on the electrode plate can be provided with other circuit modules to realize integration. The invention has simple and compact structural design and strong practicability.
Description
Technical Field
The invention relates to the technical field of ion migration tubes, in particular to a micro-array ion migration tube which is a core component of an ion migration spectrum.
Background
The ion mobility spectrometry is an instrument for detecting ions by utilizing different mobility rates of the ions, an ionization source ionizes a sample into positive and negative ions, the positive and negative ions fly into a migration area under the action of an ion gate, and reach a detector after a certain distance to generate an ion signal. Different positive and negative ions pass through the migration region at different times, and the detection and separation of the sample are realized corresponding to different signals of the peak-out time.
Because the physical and chemical properties of the detected sample are different, the detected sample is ionized into positive and negative ions under the action of the ionization source. The electric field of the migration region is generally a positive or negative electric field, so that the generated positive and negative ions can only detect ions of one mode at a time, namely, the positive electric field detects positive ions, and the negative electric field detects negative ions. The traditional single ion transfer tube works under the positive electric field environment, namely in a positive mode, or works under the negative electric field environment, namely in a negative mode. In order to realize one-time sample introduction, positive and negative ions are detected simultaneously, and a single ion migration tube is difficult to realize. Some develop fast positive and negative switching of a single ion mobility tube, namely: time division multiplexing technology of the migration tube. The ion migration tube has electrostatic effect and large capacitance is formed between electrodes, which directly affect the speed of mode switching, and the high-voltage positive and negative switching puts high technical requirements on the high-voltage power supply, so that the miniaturized positive and negative high-voltage switching power supply is difficult to manufacture.
The range of samples detectable by different ionization sources and the performance index of the IMS are different. Such as radioactive nickel sources, primarily undergo proton transfer, charge transfer, addition reactions, and deprotonation reactions. The lamp ionization principle is an ionization mode in which sample molecules absorb the energy of one photon and lose one electron to form ions. Photo-ionization occurs in such a way that the sample molecules absorb photons at energies equal to or higher than their ionization energies. The detection range of the ionization mode is different, and the detection range of the sample can be expanded if the ionization mode and the ionization mode are combined.
In order to realize one-time sample introduction, positive and negative ions are detected simultaneously, or the ion migration tubes of different ionization sources in the same mode are detected simultaneously, the array ion migration tube is specially designed. The application range of the ion mobility spectrometry is expanded, and the full coverage of positive and negative mode samples or the synchronous detection of different ionization sources is realized.
The invention provides a micro-array ion migration tube for solving the above problems, and the integration level of two migration tube arrays is higher.
Disclosure of Invention
The invention aims to provide a micro-array ion migration tube, which mainly solves the technical problems of integration, miniaturization and the like of a plurality of ion migration tube arrays.
The invention adopts the following technical scheme:
a micro-array of ion-transfer tubes,
the device comprises an ionization source, an electrode plate, a reaction zone body, a migration zone body, an electrode bar, a double-body ion gate, an ion repeller, a grid mesh, a Faraday disc bracket and a signal shielding cylinder;
the reaction area body and the migration area body are respectively of a double-cylinder structure with two inner cylinders which are arranged from top to bottom and are provided with two openings at two ends, and the two inner cylinders are bilaterally symmetrical and respectively penetrate through the upper end surface and the lower end surface of the reaction area body and the migration area body;
the double-body ion gate is two ion gates which are fixed on the same plane and are mutually spaced;
the reaction area body is arranged above the migration area body, the double-body ion gate is arranged between the reaction area body and the migration area body, the two inner cylinders on the reaction area body are respectively arranged in a one-to-one correspondence way with the two inner cylinders on the migration area body through one ion gate on the double-body ion gate, and the geometric center lines of the two inner cylinders on the reaction area body are respectively superposed with the geometric center lines of the two inner cylinders on the migration area body;
a row of through holes are respectively arranged on the left side and the right side of each inner cylinder of the reaction area body from top to bottom, and the number of the through holes in each row is at least 1; two rows of through holes corresponding to the left side and the right side of the inner cylinder are in parallel symmetry;
a row of through holes are respectively arranged on the left side and the right side of each inner cylinder of the migration area body from top to bottom, and the number of the through holes in each row is at least 5; two rows of through holes corresponding to the left side and the right side of the inner cylinder are in parallel symmetry;
parallel electrode plates are respectively arranged on the wall surfaces of the front cylinder body and the rear cylinder body of the reaction area body and the migration area body, and electrode through holes are respectively arranged on the electrode plates corresponding to the through holes of the reaction area body and the migration area body;
an electrode bar is arranged in each through hole, two ends of the electrode bar respectively penetrate through the electrode through holes of the front and the rear electrode plates, the electrode through holes corresponding to one in the two rows of electrode through holes on the left side and the right side of each inner cylinder are connected through metal leads, and the electrode bar is welded and fixed with the electrode through holes; thus, the metal lead on the front electrode plate, the two electrode bars correspondingly and electrically connected with the front electrode plate and the metal lead on the corresponding rear electrode plate and electrically connected with the two electrode bars enclose a square electrode ring;
the left side and the right side of the upper part of the reaction area body are respectively provided with an air outlet hole which is respectively communicated with the left inner cylinder and the right inner cylinder, and the middle part of the upper part of the reaction area body is provided with a shared sample inlet hole which is respectively communicated with the two inner cylinders; an annular ion repeller is arranged at the upper opening end of each inner cylinder in the reaction zone; an annular grid electrode is arranged at the lower opening end of each inner cylinder in the migration area; the grid electrode, an inner cylinder of the migration zone body, an ion gate of the double-body ion gate, and an inner cylinder of the reaction zone body are coaxially arranged with the ion repeller;
an insulation ionization source cover with two grooves at the lower end, an ionization source is arranged above each ion repeller, the two ionization sources are respectively arranged in the grooves of the ionization source cover, the peripheral edges of the two grooves of the ionization source cover are respectively connected with the peripheral edges of the upper open ends of the two inner cylinders in a sealing way, and the light outlet or ion leading-out end of the ionization source faces the middle cavity of the annular ion repeller; a Faraday disc is arranged below the grid electrode, the upper end of the Faraday disc is a signal receiving disc, and the lower end of the Faraday disc is a T-shaped signal leading-out end; a Faraday disc frame and a signal shielding cylinder are arranged below and outside the Faraday disc; a common floating air hole communicated with the inner cylinders of the two migration zone bodies respectively is arranged between the two Faraday disks at the middle part of the shielding cylinder.
The uppermost metal wire of each inner cylinder corresponding to the reaction area of one circuit board is electrically connected with the ion exclusion pole through a voltage dividing resistor, and the lowermost metal wire of the reaction area is electrically connected with an ion gate leading-out end of the double-body ion gate through the voltage dividing resistor; when the number of the metal wires in the reaction zone is more than 2, the metal wires are connected in series sequentially through the voltage dividing resistors from top to bottom; the number of the metal wires in the migration area is more than 5, the metal wire at the lowest part of the migration area is electrically connected with the grid through a divider resistor, and the metal wire at the highest part of the migration area is electrically connected with the leading-out end of the other ion gate of the double-body ion gate through the divider resistor; and metal lead electrodes in the migration area are sequentially connected in series through the voltage dividing resistors from top to bottom.
The ionization source, the reaction zone inner cylinder, the ion gate, the migration zone inner cylinder and the Faraday disc form an ion migration tube in a central shaft, and the number of the ion migration tubes is 2 along the left and right arrays.
The electrode plates are a planar circuit board, and are divided into a front group and a rear group, the metal wires are arranged on an ion migration tube at equal intervals in two groups along the direction of the migration tube body, the first group is the metal wire of the reaction zone, the second group is the metal wire of the migration zone, two ends of the metal wire are respectively provided with an electrode through hole, and the metal wire is generally as wide as the electrode through hole in diameter and used for welding an electrode rod; two ion gate through holes are formed in the middle of the two groups of metal wires and used for welding the ion gates; the metal conductors may be on one or both sides of the planar circuit board. The planar circuit board can be a Printed Circuit Board (PCB), a printed ceramic, glass, polytetrafluoroethylene or polyimide film or other substrate circuit boards; the planar circuit board can be provided with a welding plate for welding the divider resistor; the size of the planar circuit board is determined according to the requirement, and other circuit modules can be arranged in other areas.
The electrode bar is a metal conductive electrode bar, and the two ends of the electrode can be inserted into the electrode through holes of the electrode plate, so that the electrode bar can be conveniently welded on the electrode plate.
Two groups of electrodes of a single ion gate of the double-body ion gate are respectively and independently led out, can be led out from an ion gate hole of the electrode plate and can be a BP gate or a TP gate.
The divider resistor is directly welded on the metal lead of the electrode plate or arranged outside the electrode plate.
The ionization source can adopt ionization modes such as a VUV lamp, a nickel source, corona discharge, glow discharge, electrospray or laser and the like.
The invention forms two ion migration tubes for parallel use by the ion migration tube array and considers the miniaturization design. The two ion migration tubes are provided with independent ionization sources, reaction regions, ion gates, migration regions and signal detection units, so that ions in two modes or ions in different ionization sources do not interfere with each other and work independently, and the stability of detection signals is ensured. The electrodes of the reaction zone and the migration zone are composed of an upper electrode plate, a lower electrode plate and an electrode bar, the migration tube is more compact, and the upper electrode plate is distributed with a voltage dividing resistor for forming a migration electric field, so that the volume of the migration tube is reduced. The two ion migration tubes share air inlet and air floating, so that an air supply system of the ion migration spectrum is simplified; and the single migration pipe body is shared, so that the connectivity and the sealing performance of the migration pipe are ensured. Other areas on the electrode plate can be provided with other circuit modules to realize integration. The invention has simple and compact structural design and strong practicability.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a cross-sectional view of the overall structure of a dual-tube micro-array ion-transfer tube of the present invention, which is exemplified by a VUV lamp ion source.
FIG. 2 is a schematic view of the overall structure of a dual-tube micro-array ion mobility tube according to the present invention.
FIG. 3 is a schematic diagram of a planar electrode plate structure of the present invention with a dual tube as an example.
Fig. 4 is a schematic diagram of a dual-body BN ion gate structure according to the present invention.
Detailed Description
According to the overall structure schematic diagram shown in fig. 2, the micro-array ion mobility tube comprises an ionization source module, an electrode plate, a reaction region, an ion gate, a mobility region, a signal receiving module and the like, which are all arrayed.
Referring to the cross-sectional view of fig. 1, the ionization source module includes an ionization source 2 and an ionization source cover 1, wherein the ionization source 1 may be an ionization mode such as VUV lamp, nickel source, corona discharge, glow discharge, electrospray, laser, etc., and the ionization source in this embodiment is an ionization source such as VUV, etc. In order to facilitate the extraction of ions, an ion repeller 3 is provided at the front end of the ionization source.
The signal receiving module comprises a Faraday plate 11, a Faraday plate frame 9 and a shielding cylinder 10, and is arranged on each migration pipe. The faraday plate frame 9 is an insulator and plays a role of fixing the faraday plate 11. The shielding cylinder 10 is positioned at the outermost layer and plays a role of electromagnetic shielding, and a common floating air hole 13 is arranged at the outer side of the shielding cylinder and is communicated with the inner cylinder of the migration zone body 7. The faraday plate 11 is generally a plate-type signal receiving apparatus, and a grid 8 for eliminating interference is installed in front thereof.
The reaction zone consists of a reaction zone body 4 and a reaction zone electrode, the reaction zone body 4 is an insulating rectangular body with double inner cylinders, and each migration tube is provided with an air outlet 12 and a common air inlet 14. The migration region is composed of a migration region body 7 and a migration region electrode. The electrode plate 19 is a circuit board, which is divided into a front plate and a rear plate, as shown in fig. 3, the surface of the planar electrode plate is provided with metal leads 15 and corresponding through holes 20 in an array manner, the double-migration tube array is provided with two rows of metal leads 15, each row of metal leads 15 is divided into a left group and a right group by rectangular ion gate holes 17, the left side is provided with migration area electrodes, the right side is provided with reaction area electrodes, and a rectangular electrode ring formed by the front reaction area electrodes and the rear reaction area electrodes and the electrode bar 6 is provided with; the front and the back migration area electrodes and the electrode bar 6 form a rectangular electrode ring as the migration area electrode; the reaction area electrode and the migration area electrode are electrically connected in pairs by a voltage dividing resistor 16; an air inlet hole 18 is arranged at the middle reaction zone of the two columns.
The number of the ion gates is related to the number of the migration tubes, and the double migration tube array is a double-body ion gate 5, which is shown in figure 4BN structure ion gates. There are independent ion gates, each ion gate has two groups, the groups are not connected with each other, the metal wires 21 connected in the group form an interdigital structure on a plane. The ion gate is located between the reaction region and the migration region and is electrically connected with the reaction region and the migration region by a voltage dividing resistor 16. The present embodiment is described using a BN type ion gate, and a TP type ion gate can be designed in accordance with this, and the present patent is also applicable.
Each migration tube is provided with an independent ionization source, a reaction region, an ion gate, a migration region and a signal receiving module, generated signals are subjected to complementary interference and operate independently, and the migration tubes of different modes or ionization sources can work simultaneously conveniently to generate synchronous signals. Meanwhile, the ionization source cover 1, the reaction area body 4, the migration area body 7 and the shielding cylinder 10 are integrated, a floating air hole 13 and an air inlet hole 14 are shared, air supply is facilitated, the electrode rod 6 penetrates through the reaction area body 4 and the migration area body 7 to be connected with an upper electrode plate 19 and a lower electrode plate 19, and the electric field electrodes are also integrated.
The circuit, shape and size of the electrode plate 19 are determined according to the requirement, for example, the metal wire 15 may be placed with a pad to directly connect the voltage dividing resistance welding 16 to the plate, or welded to other areas, or other circuit modules may be printed in other areas, which is beneficial to integration and miniaturization.
This embodiment is two ion mobility tube arrays, if the ion mobility tube of this design thinking array is referred to more than two ion mobility tubes, is applicable to this patent equally.
Claims (8)
1. The micro-array ion migration tube comprises an ionization source, an electrode plate, a reaction region body, a migration region body, an electrode bar, a double-body ion gate, an ion exclusion electrode, a grid mesh, a Faraday disc bracket and a signal shielding cylinder;
the reaction area body and the migration area body are respectively of a double-cylinder structure with two inner cylinders which are arranged from top to bottom and are provided with two openings at two ends, and the two inner cylinders are bilaterally symmetrical and respectively penetrate through the upper end surface and the lower end surface of the reaction area body and the migration area body;
the double-body ion gate is two ion gates which are fixed on the same plane and are mutually spaced;
the reaction area body is arranged above the migration area body, the double-body ion gate is arranged between the reaction area body and the migration area body, the two inner cylinders on the reaction area body are respectively arranged in a one-to-one correspondence way with the two inner cylinders on the migration area body through one ion gate on the double-body ion gate, and the geometric center lines of the two inner cylinders on the reaction area body are respectively superposed with the geometric center lines of the two inner cylinders on the migration area body;
a row of through holes are respectively arranged on the left side and the right side of each inner cylinder of the reaction area body from top to bottom, and the number of the through holes in each row is at least 1; two rows of through holes corresponding to the left side and the right side of the inner cylinder are in parallel symmetry;
a row of through holes are respectively arranged on the left side and the right side of each inner cylinder of the migration area body from top to bottom, and the number of the through holes in each row is at least 5; two rows of through holes corresponding to the left side and the right side of the inner cylinder are in parallel symmetry;
parallel electrode plates are respectively arranged on the wall surfaces of the front cylinder body and the rear cylinder body of the reaction area body and the migration area body, and electrode through holes are respectively arranged on the electrode plates corresponding to the through holes of the reaction area body and the migration area body;
an electrode bar is arranged in each through hole, two ends of the electrode bar respectively penetrate through the electrode through holes of the front and the rear electrode plates, the electrode through holes corresponding to one in the two rows of electrode through holes on the left side and the right side of each inner cylinder are connected through metal leads, and the electrode bar is welded and fixed with the electrode through holes; thus, the metal lead on the front electrode plate, the two electrode bars correspondingly and electrically connected with the front electrode plate and the metal lead on the corresponding rear electrode plate and electrically connected with the two electrode bars enclose a square electrode ring;
the left side and the right side of the upper part of the reaction area body are respectively provided with an air outlet hole which is respectively communicated with the left inner cylinder and the right inner cylinder, and the middle part of the upper part of the reaction area body is provided with a shared sample inlet hole which is respectively communicated with the two inner cylinders; an annular ion repeller is arranged at the upper opening end of each inner cylinder in the reaction zone; an annular grid electrode is arranged at the lower opening end of each inner cylinder in the migration area; the grid electrode, an inner cylinder of the migration zone body, an ion gate of the double-body ion gate, and an inner cylinder of the reaction zone body are coaxially arranged with the ion repeller;
an insulation ionization source cover with two grooves at the lower end, an ionization source is arranged above each ion repeller, the two ionization sources are respectively arranged in the grooves of the ionization source cover, the peripheral edges of the two grooves of the ionization source cover are respectively connected with the peripheral edges of the upper open ends of the two inner cylinders in a sealing way, and the light outlet or ion leading-out end of the ionization source faces the middle cavity of the annular ion repeller; a Faraday disc is arranged below the grid electrode, the upper end of the Faraday disc is a signal receiving disc, and the lower end of the Faraday disc is a T-shaped signal leading-out end; a Faraday disc frame and a signal shielding cylinder are arranged below and outside the Faraday disc; a common floating air hole communicated with the inner cylinders of the two migration zone bodies respectively is arranged between the two Faraday disks at the middle part of the shielding cylinder.
2. The microarray ion transfer tube of claim 1, wherein:
the uppermost metal wire of each inner cylinder corresponding to the reaction area of one circuit board is electrically connected with the ion exclusion pole through a voltage dividing resistor, and the lowermost metal wire of the reaction area is electrically connected with an ion gate leading-out end of the double-body ion gate through the voltage dividing resistor; when the number of the metal wires in the reaction zone is more than 2, the metal wires are connected in series sequentially through the voltage dividing resistors from top to bottom; the number of the metal wires in the migration area is more than 5, the metal wire at the lowest part of the migration area is electrically connected with the grid through a divider resistor, and the metal wire at the highest part of the migration area is electrically connected with the leading-out end of the other ion gate of the double-body ion gate through the divider resistor; and metal lead electrodes in the migration area are sequentially connected in series through the voltage dividing resistors from top to bottom.
3. The microarray ion transfer tube of claim 1, wherein: the ionization source, the reaction zone inner cylinder, the ion gate, the migration zone inner cylinder and the Faraday disc form an ion migration tube in a central shaft, and the number of the ion migration tubes is 2 along the left and right arrays.
4. The microarray ion transfer tube of claim 3, wherein: the electrode plates are a planar circuit board, and are divided into a front group and a rear group, the metal wires are arranged on an ion migration tube at equal intervals in two groups along the direction of the migration tube body, the first group is the metal wire of the reaction zone, the second group is the metal wire of the migration zone, two ends of the metal wire are respectively provided with an electrode through hole, the diameters of the metal wire and the electrode through holes are equal, and the metal wire and the electrode through holes are used for welding electrode bars; two ion gate through holes are formed in the middle of the two groups of metal wires and used for welding the ion gates; the metal wires are arranged on one side or two sides of the planar circuit board, and the planar circuit board is a Printed Circuit Board (PCB), a printed ceramic, glass, polytetrafluoroethylene or polyimide film substrate circuit board; the plane circuit board is provided with or not welded with a welding plate of the divider resistor; the size of the planar circuit board is determined according to the requirement, and other circuit modules are arranged in other areas or not.
5. The microarray ion transfer tube of claim 1, wherein: the electrode bar is a metal conductive electrode bar, and the two ends of the electrode can be inserted into the electrode through holes of the electrode plate, so that the electrode bar can be conveniently welded on the electrode plate.
6. The micro-array ion transfer tube of claim 1 or 2, wherein: two groups of electrodes of a single ion gate of the double-body ion gate are respectively and independently led out, and can be led out from an ion gate hole of a BN type ion gate or an ion gate hole of a TP type ion gate of the electrode plate.
7. The micro-array ion transfer tube of claim 1 or 2, wherein: the divider resistor is directly welded on the metal lead of the electrode plate or arranged outside the electrode plate.
8. The microarray ion transfer tube of claim 1, wherein: the ionization source adopts a VUV lamp, a nickel source, corona discharge, glow discharge, electrospray or laser ionization mode.
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| CN201811381274.4A CN111199868B (en) | 2018-11-20 | 2018-11-20 | Micro-array ion migration tube |
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| CN201811381274.4A CN111199868B (en) | 2018-11-20 | 2018-11-20 | Micro-array ion migration tube |
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| WO2005050159A2 (en) * | 2003-10-14 | 2005-06-02 | Washington State University Research Foundation | Ion mobility spectrometry method and apparatus |
| CN101752176B (en) * | 2008-12-17 | 2012-02-08 | 中国科学院大连化学物理研究所 | Array ion migration tube |
| CN108039312A (en) * | 2018-01-31 | 2018-05-15 | 谱瑞科技（大连）有限公司 | Transference tube |
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