CN201589766U - Chemical agent detector - Google Patents
Chemical agent detector Download PDFInfo
- Publication number
- CN201589766U CN201589766U CN2010201021604U CN201020102160U CN201589766U CN 201589766 U CN201589766 U CN 201589766U CN 2010201021604 U CN2010201021604 U CN 2010201021604U CN 201020102160 U CN201020102160 U CN 201020102160U CN 201589766 U CN201589766 U CN 201589766U
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- drift tube
- drift
- ion trap
- ion
- sample steam
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Abstract
The utility model relates to a chemical agent detector, including a sample steam inlet, a drift tube intake port is arranged after the sample steam inlet, a ventilated septum is arranged between the sample steam inlet and the drift tube intake port, a sample steam sampling pump is also connected behind the sample steam inlet, the other end of the drift tube intake port is connected with an ion trap drift tube, wherein the ion trap replaces an ionization storage area of the traditional drift tube, an ion gate is arranged between the ion trap and a drift region, the other end face of the drift tube is provided with a drift tube air outlet, the other end of the drift tube air outlet is connected with an internal circulation pump, the other end of the internal circulation pump is connected with a drying chamber, the other end of the drying chamber is connected with a doping chamber, the other end of the doping chamber is provided with an internal circulation carrier gas inlet which is arranged behind the ventilated septum and is communicated with the drift tube intake port. Because the ion trap space is small, internal ion concentration difference may be balanced in a short time, and the detector is capable of synchronously detecting positive and negative ions.
Description
Technical field:
The utility model relates to a kind of pick-up unit, particularly a kind of chemical warfare agent detector.
Background technology:
At present, ion drift rate spectrometer (Ion Mobil ity Spectrometer, IMS) be a kind of novel gas phase analysis and the detecting instrument that grows up nearly decades, detect the trace chemistry substance classes by measuring the drift rate of gaseous state characteristic ion in weak electric field.It mainly is made up of drift tube and peripheral circuit and air-channel system, sampling system.Drift tube is the place that ion forms and drifts about, and is most important parts among the IMS, and its performance has directly determined the index of entire I MS instrument.
The conventional Drift pipe mainly is made up of four parts: 1 ionization storage area; 2 ion drift districts; 3 ion gates between ionization chamber and drift region; 4 faraday's dishes as ion detector; Wherein ionization storage area and drift region are the major parts that constitutes drift tube.The sample gas molecule enters in the ionization source with carrier gas during work, become corresponding ion by ionization, because be provided with drift rings and dead ring in the inside pipe wall of ionization storage area at interval, so ionization has electric field in the storage area, under ionization storage area effect of electric field, move then to the drift region direction, because the ion gate overwhelming majority time is in closed condition, its reverse highfield stops ion to be moved further to the drift region, and ion stores before ion gate.When the ionization storage area added positive high voltage and forms positive electric field, under the positive electric field effect, positive ion pumped in ionization source, to the drift of drift region direction and store before ion gate, was called for short holotype; Otherwise negative ion pumps and stores before ion gate from ionization source, is called for short negative mode.So,, need to apply the opposed polarity electric field in storage area and drift region to the opposed polarity ion detection.
Chemical warfare agent is divided into two big classes: nerve toxicant such as sarin, tabun, soman and VX and vesicant agent such as yperite, mustardgas, lewisite and hydrogen cyanide etc.Because the difference of central atom kind and molecular structure, nerve toxicant is at gas molecule in space---in the ion chemistry reaction, the chemical reaction kinetics that forms positive ion is bigger, easier formation positive ion; And the easier formation negative ion of vesicant agent.So, when gas is detected, need carry out ion detection under the positive negative mode respectively to determinand.
But the conventional Drift pipe is because design feature own has determined it to realize the subject matter that positive and negative mode detection faces.During positive and negative mode switch, because the direction of storage area electric field changes, the ion in the storage area also experiences from the process of a kind of polarity to another kind of polarity transformation, and this process is depleted to other by original ion and plants the ion accumulation of polarity until equilibrium concentration.New ion pumps from ionization source, and drift reaches the storage area again through middle long drift reaction zone.The ion accumulation process is consuming time longer, can't realize that the negative ions synchronous monitoring is used for the detection of chemical warfare agent.
Summary of the invention:
This utility patent detects requirement at the negative ions of chemical warfare agent, the ion fireballing characteristics that restore balance in the coupled ion trap, propose a kind of negative ions synchronous detection be used for the chemical warfare agent fast detecting the chemical warfare agent detector.
The purpose of this utility model is achieved through the following technical solutions: a kind of chemical warfare agent detector, comprise the sample steam inlet, be provided with the drift tube air intake opening behind the sample steam inlet, be provided with ventilative barrier film between sample steam inlet and the drift tube air intake opening, also be connected with sample steam sampling pump behind the sample steam inlet, the other end of drift tube air intake opening is connected with drift tube, another end face of drift tube is provided with the drift tube gas outlet, the other end of drift tube gas outlet is connected with internal circulation pump, the other end of internal circulation pump is connected with hothouse, the other end of hothouse is connected with the doping chamber, the other end of doping chamber is provided with interior circulation carrier gas inlet, interior circulation carrier gas inlet is arranged on ventilative barrier film rear, and communicate with the drift tube air intake opening, drift tube is the ion trap drift tube, the front of ion trap drift tube inside is provided with the ionization source outer tube, the center of ionization source outer tube is provided with through hole, through hole links to each other with the other end of drift tube air intake opening, the zone of the front portion of ion trap drift tube inside is an ion trap, the zone at the rear portion of ion trap drift tube inside is the drift region, be provided with the ion grid between ion trap and the drift region, the ionization source outer tube is provided with two ionization sources, ionization source is located at ion trap inside, only be provided with dead ring in the inside pipe wall of ion trap, be provided with drift rings and dead ring in the inside pipe wall of drift region at interval, the rear portion of drift region is provided with shield grid, and the back of shield grid is provided with faraday's dish.
The utility model compared with prior art has the following advantages: the ion trap drift tube substitutes the ionization storage area of conventional Drift pipe with ion trap, and storage area and drift region double grid ion gate change single ion gate grid into.When applying same voltage on ion trap and the ion gate grid, the ion trap inner space does not have electric field, and negative ions is stored in the ion trap; Apply pulse voltage on ion trap, form a high power pulse electric field between ion trap and ion gate grid, ion quickens to enter the drift region under electric field action.Impulse electric field is positive electric field when (voltage is higher than ion gate on the ion trap), and positive ion is accelerated and enters the drift region; Otherwise negative ion is accelerated and enters the drift region.After pulse voltage was cancelled, the ion trap internal electric field also disappeared thereupon; Because ion trap space is little, inner ion concentration difference reaches balance at short notice.Chemical warfare agent detector with ion trap drift tube can be realized the negative ions synchronous detection.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Number in the figure: circulation carrier gas inlet, 10-ion trap drift tube, 11-ionization source outer tube, 12-ion trap, 13-drift region, 14-ion grid, 15-ionization source, 16-drift rings, 17-dead ring, 18-shield grid, 19-faraday dish in 1-sample steam inlet, 2-drift tube air intake opening, the ventilative barrier film of 3-, 4-sample steam sampling pump, 5-drift tube gas outlet, 6-internal circulation pump, 7-hothouse, 8-doping chamber, the 9-.
Embodiment:
In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.
Show a kind of embodiment of the utility model chemical warfare agent detector as Fig. 1, comprise sample steam inlet 1, be provided with drift tube air intake opening 2 behind the sample steam inlet 1, be provided with ventilative barrier film 3 between sample steam inlet 1 and the drift tube air intake opening 2, also be connected with sample steam sampling pump 4 behind the sample steam inlet 1, the other end of drift tube air intake opening 2 is connected with drift tube, another end face of drift tube is provided with drift tube gas outlet 5, the other end of drift tube gas outlet 5 is connected with internal circulation pump 6, the other end of internal circulation pump 6 is connected with hothouse 7, the other end of hothouse 7 is connected with doping chamber 8, the other end of doping chamber 8 is provided with interior circulation carrier gas inlet 9, interior circulation carrier gas inlet 9 is arranged on ventilative barrier film 3 rears, and communicate with drift tube air intake opening 2, drift tube is an ion trap drift tube 10, ion trap drift tube 10 structures are with respect to the conventional Drift pipe, it is simple that the drift tube structure becomes, the front of ion trap drift tube 10 inside is provided with ionization source outer tube 11, the center of ionization source outer tube 11 is provided with through hole, through hole links to each other with the other end of drift tube air intake opening 2, the front area of ion trap drift tube 10 inside is an ion trap 12, ion trap 12 replaces conventional Drift pipe ionization storage area, ion trap 12 is made up of a pair of ring electrode and two endcap electrodes that are hyperboloid shape, on ring electrode, add radio-frequency voltage or add DC voltage again, two endcap electrode ground connection up and down, increase the mxm. of radio-frequency voltage gradually, ion enters the range of instability, discharge by the aperture that end cap is extremely gone up, therefore, when the mxm. of radio-frequency voltage increases gradually, mass-to-charge ratio ion is from small to large got rid of one by one and is recorded and obtains mass spectrogram, ion trap mass spectrometry can carry out the multi-stage ms analysis easily, evaluation for the structure of matter is very useful, in mass spectral use, ion trap 12 is considered to do qualitative aspect greater advantage; And quadrupole rod has superiority aspect quantitatively; The Background Region of ion trap drift tube 10 inside is drift region 13, be provided with ion grid 14 between ion trap 12 and the drift region 13, ion grid 14 replace conventional Drift pipe double grid ion gate, ionization source outer tube 11 is provided with two ionization sources 15, ionization source 15 is located at ion trap 12 inside, only is provided with dead ring 17 in the inside pipe wall of ion trap 12, is provided with drift rings 16 and dead ring 17 in the inside pipe wall of drift region 13 at interval, the rear portion of drift region 13 is provided with shield grid 18, and the back of shield grid 18 is provided with faraday and coils 19.
The measured matter molecule enters with ventilative barrier film 3 from sample steam inlet 1 and contact under sample steam sampling pump 4 effect of bleeding, and ventilative barrier film 3 materials are high-molecular organic material, and the measured matter molecule dissolves in ventilative barrier film 3 and diffuses into barrier film 3 inwalls of breathing freely.Interior circulation carrier gas is under the effect of internal circulation pump 6, enter ventilative barrier film 3 inner wall spaces from interior circulation carrier gas inlet 9, with the molecule on ventilative barrier film 3 inwalls in drift tube air intake opening 2 is brought the ion trap 12 of ion trap drift tube 10 into, become corresponding ion by ionization, there is not electric field in the ion trap 12, negative ions is negative diffusion just, after applying pulse voltage on the ionization source tube, when forming voltage, form an electric field in ion trap 12 near ion grid 14 front portions, when relative voltage was positive voltage, direction of an electric field pointed to ion grid 14 by ion trap 12, and positive ion quickens to enter drift region 13 under electric field action; Otherwise negative ion quickens to enter drift region 13, positive or negative high voltage is frequent switch under, negative ions alternately is injected into drift region 13, can learn the substance classes that ion pair is answered by the detection to negative ions drift time.The utility model is further optimization system performance, get rid of the negative effect of hydrone and other disturbing molecules to test performance, ion trap drift tube 10 of the present utility model adopts the sealing and circulating gas circuit, ion trap drift tube 10 adopts a kind of positive and negative changing method to realize detecting, can guarantee detection speed faster, can guarantee the real-time that detects again, gas is through drift tube gas outlet 5, enter hothouse 7, reduce hydrone concentration in the gas circuit, enter doping chamber 8 again, in recyclegas, add extraordinary chemical agent, be used to shield the negative effect of disturbing molecule, gas from the doping chamber 8 come out to reenter in circulation carrier gas inlet 9.
Claims (1)
1. chemical warfare agent detector, comprise sample steam inlet (1), be provided with drift tube air intake opening (2) behind the described sample steam inlet (1), be provided with ventilative barrier film (3) between described sample steam inlet (1) and the described drift tube air intake opening (2), also be connected with sample steam sampling pump (4) behind the described sample steam inlet (1), the other end of described drift tube air intake opening (2) is connected with drift tube, another end face of described drift tube is provided with drift tube gas outlet (5), the other end of described drift tube gas outlet (5) is connected with internal circulation pump (6), the other end of described internal circulation pump (6) is connected with hothouse (7), the other end of described hothouse (7) is connected with doping chamber (8), the other end of described doping chamber (8) is provided with interior circulation carrier gas inlet (9), circulation carrier gas inlet (9) is arranged on described ventilative barrier film (3) rear in described, and communicate with described drift tube air intake opening (2), it is characterized in that: described drift tube is ion trap drift tube (10), the inner front of described ion trap drift tube (10) is provided with ionization source outer tube (11), the center of described ionization source outer tube (11) is provided with through hole, described through hole links to each other with the other end of described drift tube air intake opening (2), the zone of the front portion that described ion trap drift tube (10) is inner is ion trap (12), the zone at the rear portion that described ion trap drift tube (10) is inner is drift region (13), be provided with ion grid (14) between described ion trap (12) and described drift region (13), described ionization source outer tube (11) is provided with two ionization sources (15), described ionization source (15) is located at described ion trap (12) inside, only be provided with dead ring (17) in the inside pipe wall of described ion trap (12), be provided with drift rings (16) and dead ring (17) in the inside pipe wall of described drift region (13) at interval, the rear portion of described drift region (13) is provided with shield grid (18), and the back of described shield grid (18) is provided with faraday's dish (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201021604U CN201589766U (en) | 2010-01-27 | 2010-01-27 | Chemical agent detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201021604U CN201589766U (en) | 2010-01-27 | 2010-01-27 | Chemical agent detector |
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| CN201589766U true CN201589766U (en) | 2010-09-22 |
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| CN2010201021604U Expired - Lifetime CN201589766U (en) | 2010-01-27 | 2010-01-27 | Chemical agent detector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788529B (en) * | 2010-01-27 | 2013-09-11 | 徐伟 | Chemical warfare agent detector and method for detecting chemical warfare agent by using same |
| CN104126115A (en) * | 2012-02-16 | 2014-10-29 | 史密斯探测-沃特福特有限公司 | Synchronized ion modification |
| CN104198603A (en) * | 2014-09-01 | 2014-12-10 | 中国人民解放军军事医学科学院毒物药物研究所 | Analytic application and method of thiol nucleophilic substitution derivatization reagent |
| CN112103171A (en) * | 2020-09-18 | 2020-12-18 | 中国科学院空天信息创新研究院 | Passive sample introduction device and application |
| CN114002309A (en) * | 2020-07-28 | 2022-02-01 | 中国科学院大学 | Method for detecting chemical warfare agent and hydrolysate thereof in real time by excited state proton transfer mass spectrometry |
-
2010
- 2010-01-27 CN CN2010201021604U patent/CN201589766U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788529B (en) * | 2010-01-27 | 2013-09-11 | 徐伟 | Chemical warfare agent detector and method for detecting chemical warfare agent by using same |
| CN104126115A (en) * | 2012-02-16 | 2014-10-29 | 史密斯探测-沃特福特有限公司 | Synchronized ion modification |
| US9541524B2 (en) | 2012-02-16 | 2017-01-10 | Smiths Detection-Watford Limited | Synchronized ion modification |
| US10119938B2 (en) | 2012-02-16 | 2018-11-06 | Smiths Detection—Watford Ltd. | Synchronized ion modification |
| US10801991B2 (en) | 2012-02-16 | 2020-10-13 | Smiths Detection—Watford Ltd. | Synchronized ion modification |
| US11630080B2 (en) | 2012-02-16 | 2023-04-18 | Smiths Detection—Watford Ltd. | Synchronized ion modification |
| CN104198603A (en) * | 2014-09-01 | 2014-12-10 | 中国人民解放军军事医学科学院毒物药物研究所 | Analytic application and method of thiol nucleophilic substitution derivatization reagent |
| CN104198603B (en) * | 2014-09-01 | 2016-09-14 | 中国人民解放军军事医学科学院毒物药物研究所 | The analysis purposes of sulfydryl class nucleophilic displacement of fluorine derivatization reagent and method |
| CN114002309A (en) * | 2020-07-28 | 2022-02-01 | 中国科学院大学 | Method for detecting chemical warfare agent and hydrolysate thereof in real time by excited state proton transfer mass spectrometry |
| CN112103171A (en) * | 2020-09-18 | 2020-12-18 | 中国科学院空天信息创新研究院 | Passive sample introduction device and application |
| CN112103171B (en) * | 2020-09-18 | 2023-10-13 | 中国科学院空天信息创新研究院 | Passive sample injection device and application |
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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: 20100922 Effective date of abandoning: 20100127 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20100922 Effective date of abandoning: 20100127 |
|
| RGAV | Abandon patent right to avoid regrant |