CN103646844B - High-Field unsymmetric ion migration tube - Google Patents
High-Field unsymmetric ion migration tube Download PDFInfo
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- CN103646844B CN103646844B CN201310683904.4A CN201310683904A CN103646844B CN 103646844 B CN103646844 B CN 103646844B CN 201310683904 A CN201310683904 A CN 201310683904A CN 103646844 B CN103646844 B CN 103646844B
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Abstract
The invention provides a kind of High-Field unsymmetric ion migration tube, including：High-Field asymmetry electrode plate, ionization source, reference material are with reference to cylinder, detecting electrode and deflecting electrode.The present invention has good shield effectiveness and the focussing force to ion by using cartridge type electrode plate structure, has the advantages of miniaturization, high sensitivity, while employs pair gas circuit patterns, internal standard compound passage is added, so that test result is more accurate.
Description
Technical field
The present invention relates to safety detection technology field, and in particular to High-Field unsymmetric ion migration tube.
Background technology
Ion mobility spectrometry（IMS）It is that one kind applies more extensive explosive trace detection technology.Ion mobility spectrometry
Instrument is different based on drift velocity of the different ions in Weak Uniform Electromagnetic off field and realizes the resolution to ion, but its sensitivity relies on
In the length of migration tube, certain difficulty is caused to miniaturization.And many ionic mobilities of the material under low field connect very much
Closely, detect increasingly difficult.High-Field unsymmetric ion migrates spectral technology（FAIMS）Utilize ionic mobility of the ion in high electric field
The nonlinear change of coefficient realizes being longitudinally separated for ion, so as to realize the discriminating to material.It is Ion mobility spectrometry
Latest development, the mobility of some ions is very close, can not be separated well in common IMS migration tubes, still
In FAIMS migration tubes, by applying highfield, mobility is likely to occur nonlinear change, and difference is larger, then by not
Same offset voltage can be separated preferably.FAIMS does not need ion gate, and the length of migration area can accomplish very little, and
And sensitivity is higher, selectivity is more preferable.
High-Field asymmetric waveform transference tube is FAIMS core component, and the effect of migration tube directly affects ion and moved
The performance of spectrometer is moved, the structure of migration tube and the complexity of manufacture craft will directly influence the processing cost of instrument.
Existing technology typically uses flat migration tube structure, and the electric jamming by the external world is larger, generally requires special
For connect the pole plate of High-Field asymmetrical voltage signal increase radome, preparation technology is relative complex, and cost is higher, and this structure from
Son loss is higher, and sensitivity is low.
The content of the invention
（One）The technical problem of solution
In view of the shortcomings of the prior art, the present invention provides a kind of High-Field unsymmetric ion migration tube, has and minimizes, be sensitive
The advantages of high is spent, while structure is relatively easy, cost is relatively low.
（Two）Technical scheme
In order to realize the above object the present invention is achieved by the following technical programs：
A kind of High-Field unsymmetric ion migration tube, including：High-Field asymmetry electrode plate, ionization source, reference material with reference to cylinder and
Detecting electrode；
The High-Field asymmetry electrode plate includes outer tube and inner tube, outer tube ground connection, and inner tube connects High-Field asymmetric signal, outer tube
And gas channel is formed between inner tube, the gas channel is divided into sample channel and internal standard compound by the spacer of front and rear extension
Passage, inner tube offer the through hole of connection internal standard compound passage；
The ionization source includes outer ionization source and internal ionization source, and outer ionization source is located at the front end of outer tube, and internal ionization source is placed in
Among inner tube；
The reference material is placed among inner tube with reference to cylinder and before the internal ionization source；
The rear end of sample channel and the internal standard compound passage is both provided with detecting electrode.
Wherein, the spacer is polytetrafluoroethylplastic plastic.
Wherein, the ionization source is radioactive ionization gauge source and ultraviolet light ionization source.
Wherein, the radioactive ionization gauge source is Ni63 radioactive sources.
Wherein, the netted knot of multilayer that the standard includes being scribbled the wire netting of micro TNT explosives by surface and being rolled into reference to cylinder
Structure and metal outer cylinder.
Wherein, the detecting electrode is two circular arc-shaped metal pieces, is individually positioned in internal standard compound passage and sample channel.
It is preferred that also include deflecting electrode in the rear end of inner tube, it is relative with the position of the detecting electrode.
Wherein, the deflecting electrode is column type becket.
It is preferred that also include air pump interface in the end of outer tube, for connecting aspiration pump..
（Three）Beneficial effect
At least following beneficial effect of the present invention：
In the present invention, High-Field asymmetry electrode plate is core structure, including inner and outer tubes and is grounded through outer tube, is had very
Good screen effect, can reduce influence of the high field signal to other electronic devices as far as possible, with flat difference, it is not necessary to specially
Door be connect High-Field asymmetric signal pole plate increase radome so that the present invention transference tube have miniaturization, it is sensitive
Spend the advantages of high.By that will set, gas channel between the inner and outer pipe sections is separated into sample channel to the present invention and internal standard compound leads to
Reference material simultaneously is added with reference to cylinder in road so that can be using internal standard compound as reference, so that test result is more accurate during test sample.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these figures.
Fig. 1 is a kind of structural representation of High-Field unsymmetric ion migration tube provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of High-Field unsymmetric ion migration tube Detection electrode provided in an embodiment of the present invention；
Fig. 3 is the structural representation of the gas channel of High-Field unsymmetric ion migration tube provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, the embodiments of the invention provide a kind of High-Field unsymmetric ion migration tube structure, the transference tube bag
Include：High-Field asymmetry electrode plate, ionization source, standard are with reference to cylinder, detecting electrode and deflecting electrode.
High-Field asymmetry electrode plate includes outer tube 3 and inner tube 4, and for applying High-Field asymmetrical voltage signal, outer tube 3 connects
Ground, inner tube 4 connect High-Field asymmetric signal.Gas channel is formed between outer tube 3 and inner tube 4, the gas channel is isolated thing 6 and divided
Sample channel and internal standard compound passage are divided into, inner tube 4 offers the through hole 5 of connection internal standard compound passage.
Ionization source includes outer ionization source 1 and internal ionization source 2, for ionization detected material, produces ion, outer 1 set of ionization source
Located at the front end of outer tube 3, internal ionization source 2 is placed among inner tube 4；In an embodiment of the present invention, ionization source is Ni63 radioactive sources.
Reference material with reference to cylinder 7 be used for instrument signal is calibrated, be placed among inner tube 4 and the internal ionization source 2 it
Before, multilayer network structure that the wire nettings of micro TNT explosives is rolled into is scribbled by surface and metal outer cylinder is formed.
Detecting electrode 8 is used to detect the ion by ion migration zone, the rear end of sample channel and the internal standard compound passage
It is both provided with detecting electrode 8；Deflecting electrode 9 is used for the potential by superimposed so that ion deflecting is got on electrode, is placed in
The position relative with the detecting electrode 8.
Air pump interface 10 is used to connect aspiration pump, and air-path interface is provided for whole migration tube.
In the embodiment of the present invention, High-Field asymmetry electrode plate is core structure, including inner and outer tubes and is grounded through outer tube,
Good screen effect is had, influence of the high field signal to other electronic devices can be reduced as far as possible, and flat difference, no
Need exclusively for connect High-Field asymmetric signal pole plate increase radome so that the present invention transference tube have it is small-sized
The advantages of change, high sensitivity.The present invention by will set gas channel between the inner and outer pipe sections be separated into sample channel and
Internal standard compound passage simultaneously adds reference material with reference to cylinder so that can be using internal standard compound as reference, so that test result during test sample
It is more accurate.
Referring to Fig. 2, in order to illustrate more clearly of the structure of High-Field unsymmetric ion migration tube, according to the implementation of the present invention
Example, shows cross-sectional view at a kind of High-Field unsymmetric ion migration tube detecting electrode.
Detecting electrode 8 is two circular arc-shaped metal pieces, altogether two panels.Deflecting electrode 9 is column type becket.Separator 6 is
Polytetrafluoroethylplastic plastic part, the gas channel between outer tube 3 and inner tube 4 is isolated into two, respectively sample channel and internal standard compound
Passage.During work, deflecting electrode 9 connects negative potential and causes its current potential to be less than detecting electrode 8, and direction of an electric field is to be referred to by detecting electrode 8
To deflecting electrode 9.Explosive product anion is acted on when bringing this region into by air-flow by electric field force, can be inclined rapidly
Turn and impinge upon on detecting electrode 8, entrained electric charge can be delivered to detecting electrode 8 and form electric current, detected and amplify by rear end.
In order to become apparent from illustrating the operation principle of High-Field unsymmetric ion migration tube, the embodiments of the invention provide a kind of high
The gas channel of field unsymmetric ion migration tube, as shown in Figure 3.
Thing to be detected enters transference tube from air inlet 13, is first ionized by the outer ionization source 1 of front end in ion, Ran Houfen
Jin Ru not internal standard compound passage 11 and sample channel 12.Air-flow into internal standard compound passage 11 first passes around the standard of front end with reference to cylinder
7, be pulled away part of standards thing molecule, then by after the ionization of internal ionization source 2 from the through hole in inner tube enter inner and outer pipes between move
Move area and carry out drift screening, be detected electrode 8 and receive and produce current signal；By the air-flow of sample channel 12, in the He of outer tube 3
Screened in migration area between inner tube 4 by drift, finally detected electrode 8 receives, and produces electric signal and is recognized by the system.Internal standard compound leads to
The one side of road 11 is used for the working condition of validation instrument, on the other hand can eliminate environmental factor to a certain extent and detection is believed
Number photograph into influence.Internal standard compound passage 11 and sample channel 12 are isolated by the polytetrafluoroethylplastic plastic part of spacer 6.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that；It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
- A kind of 1. High-Field unsymmetric ion migration tube, it is characterised in that including：High-Field asymmetry electrode plate, ionization source, reference material With reference to cylinder and detecting electrode；The High-Field asymmetry electrode plate includes outer tube and inner tube, outer tube ground connection, and inner tube connects High-Field asymmetric signal, outer tube and and Gas channel is formed between inner tube, the gas channel is divided into sample channel by the spacer of front and rear extension and internal standard compound leads to Road, inner tube offer the through hole of connection internal standard compound passage；The ionization source includes outer ionization source and internal ionization source, and outer ionization source is sheathed on the front end of outer tube, and internal ionization source is placed in interior Among pipe；The reference material is placed among inner tube with reference to cylinder and before the internal ionization source；The rear end of sample channel and the internal standard compound passage is both provided with detecting electrode；Also include deflecting electrode, the deflection electricity Pole is placed in the position relative with the detecting electrode, connects negative potential and causes its current potential to be less than detecting electrode so that ion deflecting is beaten Onto detecting electrode.
- 2. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that the spacer is polytetrafluoroethyl-ne Alkene plastics.
- 3. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that the ionization source is radioactivity electricity From source and ultraviolet light ionization source.
- 4. High-Field unsymmetric ion migration tube according to claim 3, it is characterised in that the radioactive ionization gauge source is Ni63 radioactive sources.
- 5. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that the standard with reference to cylinder include by The multilayer network structure and metal outer cylinder that the wire netting that surface scribbles micro TNT explosives is rolled into.
- 6. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that the detecting electrode is two circles Arc metal plate, it is individually positioned in internal standard compound passage and sample channel.
- 7. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that the deflecting electrode is column type Becket.
- 8. High-Field unsymmetric ion migration tube according to claim 1, it is characterised in that also include gas in the end of outer tube Pump interface, for connecting aspiration pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310683904.4A CN103646844B (en) | 2013-12-12 | 2013-12-12 | High-Field unsymmetric ion migration tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310683904.4A CN103646844B (en) | 2013-12-12 | 2013-12-12 | High-Field unsymmetric ion migration tube |
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| Publication Number | Publication Date |
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| CN103646844A CN103646844A (en) | 2014-03-19 |
| CN103646844B true CN103646844B (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310683904.4A Active CN103646844B (en) | 2013-12-12 | 2013-12-12 | High-Field unsymmetric ion migration tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112687516B (en) * | 2020-12-21 | 2022-03-29 | 清华大学 | Multi-channel high-field asymmetric waveform ion mobility tube |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953014Y (en) * | 2006-09-05 | 2007-09-26 | 北京声迅电子有限公司 | Micro explosive iron detector |
| CN101067616A (en) * | 2007-06-06 | 2007-11-07 | 中国科学院合肥物质科学研究院 | Longitudinal high-field asymmetric waveform ion mobility spectrometry device |
| CN101752178A (en) * | 2008-12-17 | 2010-06-23 | 中国科学院大连化学物理研究所 | Cylindrical non-symmetric field ion migration tube |
| CN101800150A (en) * | 2010-03-25 | 2010-08-11 | 中国科学院合肥物质科学研究院 | High-filed asymmetrical wave ion transference tube and production method thereof |
-
2013
- 2013-12-12 CN CN201310683904.4A patent/CN103646844B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953014Y (en) * | 2006-09-05 | 2007-09-26 | 北京声迅电子有限公司 | Micro explosive iron detector |
| CN101067616A (en) * | 2007-06-06 | 2007-11-07 | 中国科学院合肥物质科学研究院 | Longitudinal high-field asymmetric waveform ion mobility spectrometry device |
| CN101752178A (en) * | 2008-12-17 | 2010-06-23 | 中国科学院大连化学物理研究所 | Cylindrical non-symmetric field ion migration tube |
| CN101800150A (en) * | 2010-03-25 | 2010-08-11 | 中国科学院合肥物质科学研究院 | High-filed asymmetrical wave ion transference tube and production method thereof |
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| CN103646844A (en) | 2014-03-19 |
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