CN201141853Y - Ion transfer spectrometer - Google Patents
Ion transfer spectrometer Download PDFInfo
- Publication number
- CN201141853Y CN201141853Y CNU200720190920XU CN200720190920U CN201141853Y CN 201141853 Y CN201141853 Y CN 201141853Y CN U200720190920X U CNU200720190920X U CN U200720190920XU CN 200720190920 U CN200720190920 U CN 200720190920U CN 201141853 Y CN201141853 Y CN 201141853Y
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- electrode
- ion
- storage area
- ionic migration
- migration spectrometer
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Abstract
Disclosed is an ion mobility spectrometer which includes an electrode and an ion source which is arranged beside the electrode. The ion mobility spectrometer also includes a focusing guidance electrode or a group of focusing guidance electrodes which is/are arranged at the other side of the ion source and far away from the electrode, the focusing guidance electrode is funnel shaped so that the focusing guidance electrode can output ions from the ion source; the ion mobility spectrometer also includes a storage part which is arranged at the side where the focusing guidance electrode output ions, and the storage part is used for storing the ions generated from the ion source. The utility model adopts the proposal that the ion source and the storage part are separated, the interchange of the ion source is convenient, different ion source can be replaced without changing the post positioned structure. As the storage part can be made very thin at the direction that the ion moves and has large diameter and almost aero internal electric field, the storage part can collect a plurality of ions with little cluster thickness and almost aero directional velocity, the broadening of the ion mobility spectrum is reduced and the resolution is increased.
Description
Technical field
The utility model relates to a kind of ionic migration spectrometer that uses the ion migrating technology to detect drugs and explosive, belongs to the safety detection technology field.
Background technology
Ionic migration spectrometer is in the Weak Uniform Electromagnetic different resolutions that realize ion of drift velocity after the match according to different ions.Usually grade and constitute by sample introduction part, ionization part, ion gate, migration area, collecting region, sensing circuit, data acquisition and processing (DAP), control part.In the prior art, the ion that adopts Bradbury and Nielson door only will produce during this period in the stage of opening the door is sent to the migration area.The ion of closing the door period is dispersed into can not be stored on the tube wall by ion gate and is wasted.
Chinese patent 200310106393.6 discloses a kind of ion storage method, adopts three net electrodes to replace Bradbury and Nielson door to constitute the memory block, in the ion storage stage, and the no electric field region of ion storage between preceding two plate electrodes.When the needs ion is pushed into the migration area and moves, change first net electrode voltage ion is shifted onto between second and the 3rd net electrode, change the second net electrode again and shift ion onto migration area and move and differentiate.Because twice in ion that will storage is through the net electrode, can since collision and diffuse transmission influence to sensitivity, and control complexity comparatively.
United States Patent (USP) 5200614 also discloses a kind of method of ion storage, owing to have compound problem at ion storage stage negative ions, has influenced sensitivity.Because ionized region and memory block are united two into one, though simplified structure, ionogenic size and dimension is subjected to certain limitation, and influence is further used.
Above technology all needs long opening the door the time, ion could be sent into the migration area, can cause migration peak spectrum shape broadening, under identical migration area situation, influences resolution.
The utility model content
In order to solve above-mentioned problems of the prior art, the purpose of this utility model provides a kind of ionic migration spectrometer, can improve sensitivity and resolution effectively, and control simple and convenient.
Aspect one of the present utility model, a kind of ionic migration spectrometer has been proposed, comprising: electrode; Ion gun adjoins setting with electrode; Wherein, described ionic migration spectrometer also comprises: focus on the guiding electrode, be arranged on ionogenic that side away from electrode, form funnel-form, so that ion is exported from ion gun; And storage area, be arranged on that side of the output ion that focuses on the guiding electrode, be used to store the ion that produces from ion gun.
Preferably, described storage area comprises first termination electrode, target and second termination electrode of arranging according to this.
Preferably, first termination electrode is made of the sheet metal that has the hole.
Preferably, second termination electrode is made of expanded metal sheet.
Preferably, the distance between first termination electrode and second termination electrode is less than 4mm.
Preferably, described ionic migration spectrometer also comprises another electrode of the outgoing side that is arranged on storage area.
Preferably, described storage area and described another distance between electrodes are less than 3mm.
Preferably, at electrode, ionogenic shielded metal shell, focus between guiding electrode and the storage area and exist voltage difference and relative voltage to fix, and add fixed voltage at another electrode, with ion storage in storage area.
Preferably, change first electrode, ionogenic shielded metal shell, focus on the voltage on guiding electrode and the storage area, be stored in ion in the storage area with derivation.
Preferably, ion gun is isotope source, corona discharge, laser, ultraviolet light or X ray.
Preferably, described electrode and another electrode all form ring-type or netted.
The present invention can make things convenient for ionogenic exchange owing to taked source and the scheme that the memory block separates, and changes different sources under the situation that does not change follow-up structure.
Net electrode, ion gun, focusing guiding electrode and storage area are formed compound electrode, the shielded metal shell in net electrode, source, focusing guiding electrode and storage area exist voltage difference and relative voltage to fix, first ring electrode adds fixed voltage, and the voltage on the compound electrode can float and change storage and the derivation that realizes ion.
In the ion storage stage, the plus or minus ion of required collection is stored to storage area inside by focusing on the guiding drift electrode under effect of electric field.Because it is very thin that the direction that storage area need move at ion can be done, diameter can be done greatlyyer, and internal electric field is almost nil, it is very little to collect a large amount of ions and cluster thickness, and directed velocity is almost nil, reduces the broadening of ion mobility spectrometry, can improve resolution.
Derive the stage at ion, change compound electrode voltage and shift ion onto migration area, global voltage returns to store status immediately.
Description of drawings
Fig. 1 is the structural representation according to the ionic migration spectrometer of the embodiment of the invention.
Fig. 2 is the electrode synoptic diagram that adopts in the ionic migration spectrometer according to the embodiment of the invention.
Fig. 3 A is a side schematic view according to the storage area that ionic migration spectrometer adopted of the embodiment of the invention to Fig. 3 C.
Fig. 4 is the front schematic view according to the storage area that ionic migration spectrometer adopted of the embodiment of the invention.
Fig. 5 shows side and the front schematic view according to the focusing that ionic migration spectrometer the adopted guiding electrode of the embodiment of the invention.
Fig. 6 is the electromotive force synoptic diagram of each electrode of the ionic migration spectrometer according to the embodiment of the invention when being operated in positive ion mode.
Fig. 7 is each electrode voltage time dependent synoptic diagram of the ionic migration spectrometer according to the utility model embodiment when being operated in positive ion mode.
Embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is described further.The utility model can be operated in negative ion mode also can be operated in positive ion mode, and for simplicity, this paper only introduces the situation of positive ion mode.
Fig. 1 is the structural representation according to the ionic migration spectrometer of the utility model embodiment.As shown in Figure 1, comprise the net electrode 1, the ion gun 2 that are arranged in order, focus on guiding electrode 3, storage area 4, first ring or net electrode 5, all the other ring electrodes 6 and faraday and coil 7 etc. according to the ionic migration spectrometer of the utility model embodiment.
According to embodiment of the present utility model, ion gun 2 can be isotope source such as nickel 63, also can be sources such as corona discharge, laser, ultraviolet light, X ray.
As shown in Figure 2, net electrode 1 can form the pattern shown in the Reference numeral 8, comprises the hole of various patterns certainly, as hexagonal hole, circular hole etc.First ring electrode 5 also can form the pattern shown in the Reference numeral 9, also can form the ring-type pattern shown in the Reference numeral 8.
Fig. 3 A is a side schematic view according to the storage area that ionic migration spectrometer adopted of the utility model embodiment to Fig. 3 C.Fig. 4 is the front schematic view according to the storage area that ionic migration spectrometer adopted of the utility model embodiment.
As shown in Figure 4, one side storage area 4 be one be small sircle hole sheet metal 10 (as Fig. 3 A), middle for annulus 11 (as Fig. 3 B), another side be the can of the sheet metal 12 (as Fig. 3 C) of reticulated cell.The twine of reticulated cell requires thin as far as possible, and the distance between the two metal sheets 10 and 12 should be less than 4mm, the no electric field region of the inner formation of this storage area.
As shown in Figure 5, Reference numeral 13 and 14 represents that respectively the forward that focuses on guiding electrode 3 cuts open figure and side view.Focus on guiding electrode 3 and form the leak shape, become gradually greatly from the side direction of adjoining ion gun 2 a side away from ion gun 2, the formation focusing electric field, thus playing the effect of ion guide, also available one group of such electrode focuses on.In addition, the distance between the storage area 4 and first ring electrode 5 should be less than 3 millimeters, thereby make things convenient for the release of ion.
Fig. 6 is the electromotive force synoptic diagram of each electrode of the ionic migration spectrometer according to the utility model embodiment when being operated in positive ion mode.As shown in Figure 6, the voltage that applies on the Reference numeral 15 expression net electrodes 1.The voltage that applies on the Reference numeral 16 expression ion guns 2; Reference numeral 17 expressions focus on the voltage that applies on the guiding electrode 3; The voltage that applies on the Reference numeral 18 expression storage areas 4; The voltage that applies on Reference numeral 19 expressions, first ring or the net electrode 5.
Net electrode 1 when the solid line shown in Fig. 6 is store status, ion gun 2, focus on guiding electrode 3, storage area 4 potential energy diagrams, dotted line is ion guide net electrode 1, ion gun 2 when doing well, focuses on guiding electrode 3, storage area 4 each point potential energy diagrams.The voltage that net electrode 1, ion gun 2, focusing guiding electrode 3 and storage area 4 add can float, there is voltage difference in net electrode 1 with the shielded metal shell of ion gun 2 and with focusing guiding electrode 3 and storage area 4, first ring or net electrode 5 add fixed voltage, and the ring electrode 6 of first ring or net electrode 5 and back adds that the voltage that evenly successively decreases forms the migration area.Solid line 20 is each corresponding after ring electrode point voltage, all keeps stablizing constant at memory phase and the ion stage of deriving.
In ion storage during the stage, positive ion will move in the potential well at Reference numeral 18 places of formation and store, and regulate each point voltage and form the requirement that the suitable potential well degree of depth satisfies maximum storage and releases fast.
Draw the stage at ion, the voltage that net electrode 1, ion gun 2, focusing guiding electrode 3, storage area 4 add is brought up to voltage shown in dotted line simultaneously, making ion be directed to the migration area drifts about, differentiates, the voltage when global voltage returns to store status subsequently.
Fig. 7 is each electrode voltage time dependent synoptic diagram of the ionic migration spectrometer according to the utility model embodiment when being operated in positive ion mode.As shown in Figure 7, Reference numeral 21,22,23,24,25 is respectively net electrode 1, ion gun 2, focuses on the time dependent waveform of voltage that is applied on guiding electrode 3, storage area 4 and first ring electrode 5.
When memory phase, the voltage of net electrode 1, ion gun 2, focusing guiding electrode 3 all is higher than the voltage of storage area 4, first ring or the voltage 25 of net electrode 5 also are higher than the voltage 22 of storage area 4, and it is maximum and can release fast to regulate ion capacity that represented baseline voltage of Reference numeral 21,22,23,24,25 and the amplitude of beating can make storage.
When ion being imported the migration area from the memory block, the voltage that applies on net electrode 1, ion gun 2, focusing guiding electrode 3 and the storage area 4 is raised certain amplitude simultaneously, and all be higher than the voltage 25 of first ring electrode 5, just can shift ion onto migration area, return to store status subsequently again.
As mentioned above, bright owing to taked ion gun 2 and the scheme that storage area 4 separates, can make things convenient for the replacing of ion gun 2, allow the different ion gun of replacing under the situation that does not change follow-up structure.
In addition, net electrode 1, ion gun 2, focusing guiding electrode 3 and storage area 4 are formed compound electrodes.The shielded metal shell of net electrode 1, ion gun 2, focusing guiding electrode 3 and storage area 4 exist voltage difference and relative voltage to fix, and add fixed voltage at first ring electrode 5, and the voltage on the compound electrode can float and change storage and the derivation that realizes ion.
In the ion storage stage, the plus or minus ion of required collection floats to storage area 4 inside by focusing guiding electrode 3 and stores under effect of electric field.Because it is very thin that the direction that storage area 4 need move at ion can be done, diameter can be done greatlyyer, and internal electric field is almost nil, it is very little to collect a large amount of ions and cluster thickness, and directed velocity is almost nil, reduces the broadening of ion mobility spectrometry, can improve resolution.
Derive the stage at ion, change compound electrode voltage and shift ion onto migration area, global voltage returns to store status immediately.
Be noted that, above embodiment only is illustrative rather than definitive thereof the technical solution of the utility model, although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the utility model, and not breaking away from any modification or partial replacement of spirit and scope of the present utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (11)
1, a kind of ionic migration spectrometer is characterized in that, comprising:
Electrode (1);
Ion gun (2) adjoins setting with electrode (1); Wherein, described ionic migration spectrometer also comprises:
Focus on guiding electrode (3), be arranged on that side of ion gun (2), form funnel-form, so that ion is exported from ion gun (2) away from electrode (1); And
Storage area (4) is arranged on that side of the output ion that focuses on guiding electrode (3), is used for the ion that storage produces from ion gun (2).
2, ionic migration spectrometer as claimed in claim 1 is characterized in that described storage area (4) comprises first termination electrode (10), target (11) and second termination electrode of arranging according to this (12).
3, ionic migration spectrometer as claimed in claim 2 is characterized in that first termination electrode (10) is made of the sheet metal that has the hole.
4, ionic migration spectrometer as claimed in claim 2 is characterized in that second termination electrode (12) is made of expanded metal sheet.
5, ionic migration spectrometer as claimed in claim 2 is characterized in that distance between first termination electrode (10) and second termination electrode (10) is less than 4mm.
6, ionic migration spectrometer as claimed in claim 1 is characterized in that also comprising another electrode (5) of the outgoing side that is arranged on storage area (4).
7, ionic migration spectrometer as claimed in claim 6 is characterized in that distance between described storage area (4) and described another electrode (5) is less than 3mm.
8, ionic migration spectrometer as claimed in claim 6, it is characterized in that existing voltage difference and relative voltage to fix between shielded metal shell, focusing guiding electrode (3) and the storage area (4) in electrode (1), source (2), and add fixed voltage at another electrode (5), with ion storage in storage area (4).
9, ionic migration spectrometer as claimed in claim 8, it is characterized in that changing first electrode (1), source (2) the shielded metal shell, focus on the voltage on guiding electrode (3) and the storage area (4), be stored in ion in the storage area (4) with derivation.
10, ionic migration spectrometer as claimed in claim 1 is characterized in that ion gun (2) is isotope source, corona discharge, laser, ultraviolet light or X ray.
11, ionic migration spectrometer as claimed in claim 6 is characterized in that described electrode (1) and another electrode (5) all form ring-type or netted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720190920XU CN201141853Y (en) | 2007-12-27 | 2007-12-27 | Ion transfer spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720190920XU CN201141853Y (en) | 2007-12-27 | 2007-12-27 | Ion transfer spectrometer |
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|---|---|
| CN201141853Y true CN201141853Y (en) | 2008-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720190920XU Expired - Lifetime CN201141853Y (en) | 2007-12-27 | 2007-12-27 | Ion transfer spectrometer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011000292A1 (en) * | 2009-06-30 | 2011-01-06 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detection method using the same |
| WO2011000294A1 (en) * | 2009-06-30 | 2011-01-06 | 同方威视技术股份有限公司 | Ion mobility spectrometer and ion collector thereof |
| CN101470100B (en) * | 2007-12-27 | 2012-06-20 | 同方威视技术股份有限公司 | Ion migration spectrometer and method thereof |
| CN102592941A (en) * | 2009-06-30 | 2012-07-18 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detection method adopting same |
| CN101571508B (en) * | 2009-06-16 | 2012-10-10 | 清华大学 | High-field asymmetric waveform ion mobility spectrometer with multi-layer plate structure |
| CN102543649B (en) * | 2009-06-30 | 2014-08-13 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detecting method using same |
| DE102014221845A1 (en) | 2013-10-28 | 2015-04-30 | Nuctech Company Limited | Ion mobility spectrometer system |
| CN112924531A (en) * | 2021-01-28 | 2021-06-08 | 上海奕瑞光电子科技股份有限公司 | Ion mobility spectrometer migration tube, operation method and ion mobility spectrometer |
-
2007
- 2007-12-27 CN CNU200720190920XU patent/CN201141853Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470100B (en) * | 2007-12-27 | 2012-06-20 | 同方威视技术股份有限公司 | Ion migration spectrometer and method thereof |
| CN101571508B (en) * | 2009-06-16 | 2012-10-10 | 清华大学 | High-field asymmetric waveform ion mobility spectrometer with multi-layer plate structure |
| WO2011000292A1 (en) * | 2009-06-30 | 2011-01-06 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detection method using the same |
| WO2011000294A1 (en) * | 2009-06-30 | 2011-01-06 | 同方威视技术股份有限公司 | Ion mobility spectrometer and ion collector thereof |
| CN102592941A (en) * | 2009-06-30 | 2012-07-18 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detection method adopting same |
| US8288718B2 (en) | 2009-06-30 | 2012-10-16 | Nuctech Company Limited | Ion mobility spectrometer and detecting method using the same |
| CN102543649B (en) * | 2009-06-30 | 2014-08-13 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detecting method using same |
| CN102592941B (en) * | 2009-06-30 | 2015-04-08 | 同方威视技术股份有限公司 | Ion mobility spectrometer and detection method adopting same |
| DE102014221845A1 (en) | 2013-10-28 | 2015-04-30 | Nuctech Company Limited | Ion mobility spectrometer system |
| US9285342B2 (en) | 2013-10-28 | 2016-03-15 | Nuctech Company Limited | Ion mobility spectrometer system |
| DE102014221845B4 (en) * | 2013-10-28 | 2020-02-06 | Nuctech Company Limited | Ion mobility spectrometer system |
| CN112924531A (en) * | 2021-01-28 | 2021-06-08 | 上海奕瑞光电子科技股份有限公司 | Ion mobility spectrometer migration tube, operation method and ion mobility spectrometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081029 Effective date of abandoning: 20071227 |