CN201561956U - Ion mobility spectrometer - Google Patents
Ion mobility spectrometer Download PDFInfo
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- CN201561956U CN201561956U CN2009200734419U CN200920073441U CN201561956U CN 201561956 U CN201561956 U CN 201561956U CN 2009200734419 U CN2009200734419 U CN 2009200734419U CN 200920073441 U CN200920073441 U CN 200920073441U CN 201561956 U CN201561956 U CN 201561956U
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- ion mobility
- mobility spectrometer
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Abstract
The utility model discloses an ion mobility spectrometer which comprises a sample injection system and an ionized area, wherein the sample molecules enter into the ionized area for a drift pipe for ionization to form sample ions through the sample injection system under the carrying action of carrier gas; the ion mobility spectrometer is characterized in that the sample injection system adopts a hyperbolic paraboloid structure taking the plane where the sampling test paper is adopted as the symmetry axis, the carrier gas flows on one side where the sampling test paper is carried with the sample molecules along the both ends adjacent to the ionized area to respectively form single blade-shaped gas flow on the hyperbolic paraboloid, and the sample molecules on the sampling test paper are purged and carried to the ionized area; and the ion mobility spectrometer further comprises a sampling system, wherein the sampling system takes a circular table shape and is positioned on one side where the sampling test paper is not carried with sample molecules, and a gas partition board for allowing the gas flow to form whirly tornado cyclone is arranged inside the sampling system. The sensitivity of detection of the ion mobility spectrometer can be greatly enhanced through the sample injection system and the sampling system for the ion mobility spectrometer.
Description
Technical field
The utility model relates to a kind of ionic migration spectrometer that is used for trace detection, particularly, relates to a kind of ionic migration spectrometer that can improve the sensitivity of ionic migration spectrometer detection.
Background technology
Ion moving method (be called for short IMS) is one of main flow trace detection method in the world at present, ionic migration spectrometer is a kind of instrument of differentiating material that detects according to ion moving method principle, can the on-line quick detection drugs, explosive, poison gas and biochemical gas etc., be widely used in military affairs (chemical defence, monitoring), civil various fields such as (anti-terrorism, drug law enforcement etc.), safeguarding national security, keeping social stability, strengthen defense force, maintaining aspects such as national economy and bringing into play important effect.
Gas return path structure such as Fig. 1 of ion mobility spectrometry.With the semi-permeable diaphragm is the boundary, the gas return path of ionic migration spectrometer is divided into two relatively independent parts: sampling system and sampling system.Sampling system comprises sampling head, sampling heating arrangement (sampling head in) and the sampling air pump of bleeding, and major function is by the aspiration pump of sampling material molecule to be detected to be drawn onto near the semi-permeable diaphragm.By effects such as infiltration, diffusions, the molecule of material to be detected can pass semi-permeable diaphragm, enters sampling system.The air flow rate of sampling system is bigger usually, can reach liter/per minute usually, detects even make very micro-doubtful thing molecule also might be inhaled into ionic migration spectrometer.Semi-permeable diaphragm can intercept the pollution to ionic migration spectrometer drift tube cavity such as dust, but the detection sensitivity of the existence meeting lowering apparatus of semi-permeable diaphragm.Sampling system comprises that air pump, desiccant cavity, doping agent cavity, sample introduction are first-class.The sample molecule that passes semi-permeable diaphragm enters ionized region ionization under the rolling action of carrier gas, form sample ions.Sample ions is under drift tube internal electric field and drift gas effect, and the sample ions of different quality, collision cross-section is separated in the drift tube cavity.Under the weak electric field condition, speed v=k (T) * E of ion migration, wherein k (T) is the mobility of ion, and is relevant with factors such as the quality of ion, collision cross-sections, E is an electric field intensity.The ion of friction speed is got to and is formed the charge signal that comprises different time information on the passive electrode, just different sample ions (molecule) can be made a distinction according to these information.Sampling system is the indispensable part of conventional ion mobility spectrometer, and the normally demountable part of sampling system can be installed sampling system when direct measurement gas of ionic migration spectrometer or pressed powder.
The method of ionic migration spectrometer test sample is divided cleaning sampling mode and Direct Sampling mode.Conventional ion mobility spectrometer cleaning sampling, as Fig. 2, usually adopt many fold sampling paper wipings of certain suppleness thing to be detected is arranged, then sampling testing paper is put into sample introduction head sampling testing paper draw-in groove, as Fig. 1, the material grains that adheres on the sampling testing paper is resolved in the heating of injection port heating plate, has a carrier gas air-flow along sampling paper----ionized region direction to penetrate sampling paper simultaneously, carries the sample molecule that parses and enters ionized region ionization.The advantage of this sample introduction system is that (1) processing is easy; (2) correlation electronics control requires lowly, is easy to realize.But sample introduction efficiency is low: carrier gas penetrates sampling paper could bring particle to be detected that adhere to, that pyrolysis is separated out on the sampling paper into the ionized region zone, excessive carrier gas air-flow impacts gas equilibrium in the ionized region easily, and the carrier gas penetration power of little airflow is poor, only can carry the sample segment molecule and enter ionized space, cause the sensitivity of ion mobility spectrometry to detect the performance reduction.
Conventional ion mobility spectrometer measurement gas or Direct Sampling mode adopt the gas circuit structure of the direct draw samples molecule of air pump, usually as Fig. 3.The advantage of this direct injected is that (1) principle is simple; (2) processes is convenient; (3) sampling head is changed and is cleaned conveniently; (4) do not need sampling testing paper.But outstanding shortcoming is that sampling efficiency is low, the detection sensitivity when so just directly influencing gasmetry, and it is very fatal moving the next this defective effect of this highly sensitive detecting instrument for ion.
The utility model content
The purpose of this utility model is to provide a kind of ionic migration spectrometer, and its sampling and sampling system can improve the sensitivity that spectrometer detects.The spectrometer of high sensitivity performance is significant for enlarging ionic migration spectrometer detection range of application.
In order to achieve the above object, the technical solution of the utility model is as follows:
A kind of ionic migration spectrometer, comprise drift tube with sampling system and ionized region, described sampling system is positioned at the place ahead of described ionized region, sample molecule forms sample ions by sampling system enters drift tube under the rolling action of carrier gas ionized region ionization, described sampling system is that the plane with the sampling testing paper place is the hyperbolic paraboloid structure of axis of symmetry, a side of sample molecule is carried in carrier gas at sampling testing paper, flow into along two ends near ionized region, form the air-flow of a leaf shape of list of dual paraboloid respectively, the sample molecule on the sampling testing paper is purged and be carried to ionized region.
This ionic migration spectrometer also comprises a sampling system, be positioned at sampling testing paper and do not have sample molecule one side, described sampling system comprises inside lining sleeve, and external liner assembly has the spiral helicine stainless steel gas dividing plate of the wind spout cyclone that air-flow is formed circle round between inside lining sleeve and external liner assembly.
Described sampling system is round table-like structure.
There is infrared heating device the round table-like structure inboard of described sampling system.
Hyperbolic paraboloid sampling system of the present utility model has following advantage: (1) has overcome big carrier gas flux and may the influence of ionized region gas equilibrium have been reduced because of air-flow shakiness in the ionized region causes the spectrum peak and drift about; (2) sample that can efficiently carry on the sampling testing paper enters ionized space, effectively improves the sensitivity of ion detection; (3) simultaneously the sample molecule that enters ionized space is carried out space compression, make them concentrate on the ionized region zone line, thereby can improve the resolution of ion mobility spectrometry.
Adopt the advantage of the sampling system of round table-like wind spout to be: the sample introduction of (1) wind spout cyclone structure, to the particle extraction efficiency than traditional direct injected height; (2) air-flow of wind spout sampling system is very little to the influence of drift tube internal gas flow; (3) the sampling head inside surface is difficult for measured object and is infected with because cyclone is arranged; (4) principle is complicated, but realizes than being easier to processing on the technology; (5) built-in infrared heating device can be more effective with the volatile-resistant substance vaporization, can reduce the detection limit of volatile-resistant substance.
Description of drawings
Fig. 1 is an ionic migration spectrometer gas return path schematic diagram;
Fig. 2 is that conventional ion migration spectrum cleaning sampling detects schematic diagram;
Fig. 3 is that conventional ion migration spectrum detects the direct injected schematic diagram;
Fig. 4 is an ionic migration spectrometer dual paraboloid injection port structural drawing of the present utility model;
Fig. 5 is an ion mobility spectrometry hyperbolic paraboloid structural principle design sketch;
Fig. 6 is an ion mobility spectrometry dual paraboloid structure wind spout sample introduction principle design sketch;
Fig. 7 is a wind spout sampling system mechanical construction drawing, wherein, and (a) inside lining sleeve and cylinder helical plane package assembly; (b) wind spout integral assembling structure.
Embodiment
According to Fig. 4 to Fig. 7, provide preferred embodiment of the present utility model, and described in detail below, enable to understand better function of the present utility model, characteristics.
As shown in Figure 4, an embodiment of the present utility model detects for test paper wiping input mode carries out material, have sampling system 1 and ionized region in a kind of drift tube of ionic migration spectrometer, sampling system 1 adopts the hyperbolic paraboloid structure, plane with sampling testing paper 2 places is an axis of symmetry, carrier gas 3 is along the two ends of hyperbolic paraboloid gas circuit structure near a single leaf of ionized region 4, promptly the homonymy that carries the sampling particle at sampling testing paper 2 carries after blowing over sampling testing paper 2 and adheres on the sampling testing paper, the sample molecule 5 that parses enters ionized region, and the carrier gas 3 of hyperbolic paraboloid sampling system need not to penetrate sampling testing paper 2.Carrier gas 3 is flowed in the hyperbolic paraboloid structure, forms the air-flow effect of a leaf shape of list of dual paraboloid, can effectively the sample molecule on the sampling paper 25 be purged and be carried in the ionized region.
The sampling system 1 of dual paraboloid structure compared with prior art owing to carrier gas air-flow air inlet position difference, the carrier gas airflow shaped difference of different structure formation, thereby causes the rolling action difference on effect of carrier gas air-flow very big.The air-flow effect that dual paraboloid structure sampling system forms as shown in Figure 5, sample molecule 5 is in the same side of sampling paper on carrier gas air-flow 3 and the sampling paper 2, and the carrier gas air-flow of prior art, as shown in Figure 2, with sample molecule 5 is in the both sides of sampling testing paper on the sampling paper 2, carrier gas air-flow 3 must penetrate sampling testing paper 2 and could effectively sample molecule be carried and enter ionized region.This hyperbolic paraboloid sampling system has following advantage: (1) has overcome big carrier gas flux and may the influence of ionized region gas equilibrium have been reduced because of air-flow shakiness in the ionized region causes the spectrum peak and drift about; (2) sample that can efficiently carry on the sampling testing paper enters ionized space, effectively improves the sensitivity of ion detection; (3) simultaneously the sample molecule that enters ionized space is carried out space compression, make them concentrate on the ionized region zone line, thereby can improve the resolution of ion mobility spectrometry.
Another embodiment of the present utility model is for adopting the metering system of direct injected, described ionic migration spectrometer also has a sampling system 6, as shown in Figure 7, sampling system 6 comprise three parts: inside lining sleeve 8, spiral helicine stainless steel gas dividing plate 9, external liner assembly 10.Spiral helicine stainless steel gas dividing plate 9 is between interior external liner assembly, and the air-flow that the sample introduction blower fan blows out forms in the space of a spiral in these three parts and flows, and regulates by round platform gas inside dividing plate 9, forms the wind spout air-flow that circles round.
" wind spout " of the present utility model sampling system, adopt round table-like external structure, there is an air pump (not shown) in round platform 7, to send into the gas of certain flow at a end near drift tube, gas flows in the air drain of round platform 7 inside and forms the wind spout cyclone that circles round, cyclone central authorities weak angrily is pressed with stronger suction, can be effectively with particle suction ionized region efficiently.Adopt round table-like structure that following advantage is arranged: 1, the sampling system front end has bigger contact area, when collected specimens, and the more effective sample that collects of energy; 2, adopt frustum cone structure, bigger space is provided for whole sampling system, be convenient at the inside installation heating arrangement; 3, practical application effect, frustum cone structure sampling system efficient is far above the column structure of same internal diameter.
Round table-like sampling structure inside also has infrared heating device 11, detects or the vapourizing temperature of detected material can be heated when higher at low temperature, more material can be sucked in the ionic migration spectrometer by " wind spout " be detected.The effect that infrared heating device is be in the time of direct injected for can the more sample molecule of pyrolysis sucking-off, be drawn onto near the semi-permeable diaphragm then, thereby the sensitivity that improves instrument increases.
The advantage of wind spout sampling system (1) principle is complicated, but realizes than being easier to processing on the technology; (2) sample introduction of cyclone structure, to the particle extraction efficiency than traditional direct injected height; (3) the sampling head inside surface is difficult for measured object and is infected with because cyclone is arranged; (4) air-flow of wind spout sampling system is very little to the influence of drift tube internal gas flow; (5) built-in infrared heating device can be more effective with the volatile-resistant substance vaporization, can reduce the detection limit of volatile-resistant substance.
Adopt test paper wiping mode to carry out when material detects the wind spout sampling system not being installed.And the metering system of direct injected needs wind spout sampling system and dual paraboloid sample introduction respective outer side edges to use together.
Ionic migration spectrometer of the present utility model adopts the ionic migration spectrometer sensitivity of " hyperbolic paraboloid sampling system and wind spout sampling system " to detect index and improves a lot with abroad comparing with quasi-instrument, can Sensitive Detection goes out the drugs such as head-shaking pill of 0.1 pik.
The front provides the description of more detailed embodiment, so that any technician in this area understands the utility model.To this embodiment, those skilled in the art can make various modifications or conversion on the basis that does not break away from the utility model principle.Be that every simple, equivalence of doing according to the claims and the description of the utility model application changes and modification, all fall into the claim protection domain of the utility model patent.
Claims (4)
1. ionic migration spectrometer, comprise drift tube with sampling system and ionized region, described sampling system is positioned at the place ahead of described ionized region, sample molecule forms sample ions by sampling system enters drift tube under the rolling action of carrier gas ionized region ionization, it is characterized in that described sampling system is that the plane with the sampling testing paper place is the hyperbolic paraboloid structure of axis of symmetry.
2. ionic migration spectrometer according to claim 1, it is characterized in that, also comprise a sampling system, be positioned at sampling testing paper and do not have sample molecule one side, described sampling system comprises inside lining sleeve, external liner assembly has the spiral helicine stainless steel gas dividing plate of the wind spout cyclone that air-flow is formed circle round between inside lining sleeve and external liner assembly.
3. ionic migration spectrometer according to claim 2 is characterized in that, described sampling system is round table-like structure.
4. ionic migration spectrometer according to claim 3 is characterized in that, there is infrared heating device the round table-like structure inboard of described sampling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734419U CN201561956U (en) | 2009-06-05 | 2009-06-05 | Ion mobility spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734419U CN201561956U (en) | 2009-06-05 | 2009-06-05 | Ion mobility spectrometer |
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| CN201561956U true CN201561956U (en) | 2010-08-25 |
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| CN2009200734419U Expired - Fee Related CN201561956U (en) | 2009-06-05 | 2009-06-05 | Ion mobility spectrometer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568994A (en) * | 2010-12-31 | 2012-07-11 | 同方威视技术股份有限公司 | Sample injection device for ion mobility spectrometer (IMS), use method thereof and IMS |
| CN103698387A (en) * | 2010-12-31 | 2014-04-02 | 同方威视技术股份有限公司 | Sampling device used for ion mobility spectrometer, using method of sampling device, and ion mobility spectrometer |
| CN103854951A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High-field asymmetric waveform ion mobility spectrometer with film purging sample introduction function |
| CN103940899A (en) * | 2014-03-21 | 2014-07-23 | 东华理工大学 | Method for rapidly detecting trace amount explosive and apparatus thereof |
| WO2016107486A1 (en) * | 2014-12-31 | 2016-07-07 | 同方威视技术股份有限公司 | Detection device and detection method |
| WO2016107487A1 (en) * | 2014-12-31 | 2016-07-07 | 同方威视技术股份有限公司 | Sampling apparatus and air curtain guiding body |
| CN105954350A (en) * | 2016-06-03 | 2016-09-21 | 河北工程大学 | Gas phase ion molecule collision cross section measuring instrument and collision cross section measuring method at atmospheric pressure |
| CN106483148A (en) * | 2016-10-11 | 2017-03-08 | 中国科学院上海应用物理研究所 | A kind of thermal station of ray microprobe, thermal station device and its experimental technique |
| WO2021238983A1 (en) * | 2020-05-29 | 2021-12-02 | 同方威视技术股份有限公司 | Thermal desorption sampling apparatus, thermal desorption device, and ion migration spectrometer detection device |
| CN116429866A (en) * | 2022-01-13 | 2023-07-14 | 布鲁克光学两合公司 | Desorber for spectrometer |
-
2009
- 2009-06-05 CN CN2009200734419U patent/CN201561956U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568994A (en) * | 2010-12-31 | 2012-07-11 | 同方威视技术股份有限公司 | Sample injection device for ion mobility spectrometer (IMS), use method thereof and IMS |
| CN103698387A (en) * | 2010-12-31 | 2014-04-02 | 同方威视技术股份有限公司 | Sampling device used for ion mobility spectrometer, using method of sampling device, and ion mobility spectrometer |
| CN102568994B (en) * | 2010-12-31 | 2014-08-06 | 同方威视技术股份有限公司 | Sample injection device for ion mobility spectrometer (IMS), use method thereof and IMS |
| CN103698387B (en) * | 2010-12-31 | 2016-03-23 | 同方威视技术股份有限公司 | For the sampling device of ionic migration spectrometer and using method thereof and ionic migration spectrometer |
| CN103854951A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High-field asymmetric waveform ion mobility spectrometer with film purging sample introduction function |
| CN103940899A (en) * | 2014-03-21 | 2014-07-23 | 东华理工大学 | Method for rapidly detecting trace amount explosive and apparatus thereof |
| US10429348B2 (en) | 2014-12-31 | 2019-10-01 | Nuctech Company Limited | Detection apparatus and detection method |
| WO2016107487A1 (en) * | 2014-12-31 | 2016-07-07 | 同方威视技术股份有限公司 | Sampling apparatus and air curtain guiding body |
| US10151671B2 (en) | 2014-12-31 | 2018-12-11 | Nuctech Company Limited | Sampling device and gas curtain guide |
| US10281432B2 (en) | 2014-12-31 | 2019-05-07 | Nuctech Company Limited | Detection apparatus and detection method |
| WO2016107486A1 (en) * | 2014-12-31 | 2016-07-07 | 同方威视技术股份有限公司 | Detection device and detection method |
| US10539531B2 (en) | 2014-12-31 | 2020-01-21 | Nuctech Company Limited | Detection apparatus and detection method |
| CN105954350A (en) * | 2016-06-03 | 2016-09-21 | 河北工程大学 | Gas phase ion molecule collision cross section measuring instrument and collision cross section measuring method at atmospheric pressure |
| CN106483148A (en) * | 2016-10-11 | 2017-03-08 | 中国科学院上海应用物理研究所 | A kind of thermal station of ray microprobe, thermal station device and its experimental technique |
| WO2021238983A1 (en) * | 2020-05-29 | 2021-12-02 | 同方威视技术股份有限公司 | Thermal desorption sampling apparatus, thermal desorption device, and ion migration spectrometer detection device |
| CN116429866A (en) * | 2022-01-13 | 2023-07-14 | 布鲁克光学两合公司 | Desorber for spectrometer |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20130605 |