CN102478544A - Novel method for identifying and detecting explosive - Google Patents
Novel method for identifying and detecting explosive Download PDFInfo
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- CN102478544A CN102478544A CN2010105672774A CN201010567277A CN102478544A CN 102478544 A CN102478544 A CN 102478544A CN 2010105672774 A CN2010105672774 A CN 2010105672774A CN 201010567277 A CN201010567277 A CN 201010567277A CN 102478544 A CN102478544 A CN 102478544A
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- explosive
- carrier gas
- easily ionizable
- ionizable compound
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Abstract
The invention relates to a method for identifying and detecting an explosive. According to the invention, an ion mobility spectrometry technology which takes an UV light source as an ionization source is used, air is taken as carrier gas and floating gas, easily ionized compound is doped in carrier gas for detecting the explosive under a negative ion mode. According to the method, the concentration of the easily ionized compound in the carrier gas is adjusted for regulating and controlling the concentration of the reactive ion, the sensitivity of the detection on the explosive can be increased, and the detection of the explosive can be realized in a rapid, real time online and high sensitive mode.
Description
Technical field
The present invention provides a kind of method that explosive is discerned and detected.It is the ion mobility spectrometry technology of ionization source that the present invention adopts ultraviolet source, does carrier gas and floats gas with air, and doping easily ionizable compound detects explosive under negative ion mode in carrier gas simultaneously.The ion mobility spectrometry technology mainly is that the mobility through gaseous ion characterizes various chemical substance, to reach the purpose that various species analysis are detected.The ion mobility spectrometry of ultraviolet source mainly is that the compound that ionization energy is lower than its photon ability is carried out ionization detection, work under positive ion mode usually.Behind the doping easily ionizable compound, the ion mobility spectrometry of ultraviolet source is detected under negative ion mode to the stronger compound of electronegativity.
Background technology
So-called " explosive ", be meant various can explosion, and have burst and, the article that can constitute a threat to and endanger public safety than lethal firepower, destructiveness.
In recent years, in the world wide, the terrorist utilizes various hiding explosives to extort under false pretense, hijack a plane, and makes terrified miserable everything parts such as fatal crass, train blast.For the generation and the assurance people life property safety that eliminate these tragedy incidents, places such as airport, harbour, railway station must be found the hiding explosive in luggage and the parcel effectively.Therefore, the detection of hiding explosive day by day becomes the problem of World Focusing, is challenging research topic.
Traditional explosive detection method is the radioscopy imaging technique, and the attenuation law when utilizing X ray to pass object obtains the form and the density information of object; Like dual intensity radial imaging and X ray CT. but restricted by its principle; These class methods can only obtain physical imperfection or the density information in the object, can't judge the chemical constitution of material, are used for explosive detection and can't distinguish approaching explosive of density and non-explosive; Like TNT and coffee, thereby cause very high rate of false alarm.
Whether the ion mobility spectrometry technology that grew up in recent years can to having explosive, drugs etc. to make judgement in time several seconds in the article such as mail, parcel, the ion mobility spectrometry technology is the detection of release mechanisms at different levels, and good detection means is provided.There has been the safety detection control that is used to various countries above 10,000 IMS instruments in the whole world at present; There are 50,000 IMS checkout equipments of surpassing to be used by army (sea, land and sky are antichemical troop extremely).
The ionization source of the ion mobility spectrometry of traditional measurement explosive does
63The Ni source, though can carry out the highly sensitive detection of explosive,
63The radioactivity of Ni has certain harm to human body in application.
Summary of the invention
The present invention provides the method for a kind of identification and explosive detection, and adopting ultraviolet source is the ion mobility spectrometry technology of ionization source, does carrier gas and floats gas with air, and doping easily ionizable compound detects explosive under negative ion mode in carrier gas simultaneously.This method can be regulated and control the concentration of reactive ion through easily ionizable compound concentrations in the adjusting carrier gas, can improve the detection sensitivity to explosive highly, realizes that explosive is quick, high-sensitive detection.
For realizing above-mentioned purpose, technical scheme of the present invention is following:
The method of a kind of identification and explosive detection; The ion mobility spectrometry that the employing ultraviolet source is made ionization source is as detecting instrument; When not feeding the easily ionizable compound; The compound that the ion mobility spectrometry of ultraviolet source ionization source can only be under positive ion mode be lower than the ultraviolet source photon energy to ionization energy detects, and can not realize the detection of electronegative explosive.Reaction zone in the transference tube of ion mobility spectrometry feeds the easily ionizable compound of gaseous state, and through the irradiation of ultraviolet light, ion mobility spectrometry detects explosive under negative ion mode.
Reactive ion concentration can be regulated through regulating the easily ionizable compound concentrations, realizes the highly sensitive detection of explosive;
Said ultraviolet source is the equipment that vacuum UV lamp, diode, xenon lamp, mercury lamp or ultraviolet laser etc. can produce ultraviolet light.
Described easily ionizable compound is the compound that ionization energy is lower than used ultraviolet source photon energy.
Described easily ionizable compound is a kind of in acetone, benzene, the toluene or more than two kinds.
Described migration tube medium ultraviolet rayed easily ionizable compound can produce low-energy photoelectron, and the ionization of determinand can be through following two processes: 1, photoelectron is adsorbed onto determinand, makes its ionization; 2, photoelectron is adsorbed onto the photochemically reactive product O of carrier gas
3On, obtain O
3 -O
3 -Or its hydrated ion O
3 -(H
2O)
nReact as reagent ion and explosive and other electronegativity compounds, make determinand obtain ionization.
Advantage of the present invention:
The ion mobility spectrometry that the employing ultraviolet source is made ionization source is as detecting instrument; Reaction zone in the transference tube of ion mobility spectrometry feeds the easily ionizable compound of gaseous state; Irradiation through ultraviolet light; Realize that the ultraviolet source ion mobility spectrometry detects explosive, has avoided the use in radioactive ionization gauge source under negative ion mode; Reactive ion concentration can be regulated through regulating the easily ionizable compound concentrations, realizes the highly sensitive detection of explosive, can realize the detection of ng magnitude.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 composes synoptic diagram for ultraviolet light photo from the source ion migration; Among the figure: the compound doped device of ultraviolet source 1, easily ionizable 2, support column 3, reaction zone 4, ion gate 5, migration tube 6, sample carrier gas 7, make-up gas? 8, signal receive and detection system 9; Wherein: 10 is Faraday cylinder, and 11 is amplifier, and 12 is A/D converter, and 13 is pressurized air, and 14 is data handling system (like oscillograph).
Ion mobility spectrometry background signal figure when Fig. 2 leaves source doping easily ionizable compound acetone for ultraviolet light photo;
The detection spectrogram of TNT under negative ion mode when Fig. 3 undopes the easily ionizable compound for the ultraviolet light ionization source;
Fig. 4 is the detection spectrogram of ultraviolet light photo when ion mobility spectrometry doping acetone of TNT;
Fig. 5 is the detection spectrogram of ultraviolet light photo when ion mobility spectrometry doping acetone of ANFO;
Fig. 6 is the detection spectrogram of ultraviolet light photo when ion mobility spectrometry doping acetone of DINA.
Embodiment
In order to realize the measurement of explosive; The present invention adopts ion mobility spectrometry that ultraviolet source makes ionization source as detecting instrument; Reaction zone in the transference tube of ion mobility spectrometry feeds the easily ionizable compound of gaseous state; Through the irradiation of ultraviolet light, ion mobility spectrometry detects explosive under negative ion mode; Reactive ion concentration can be regulated through regulating the easily ionizable compound concentrations.
Do carrier gas and float gas with air, feed carrier gas in reaction zone, doping easily ionizable compound in carrier gas, reactive ion concentration can be regulated through doping easily ionizable compound concentrations in the adjusting carrier gas, realizes the highly sensitive detection of explosive.
The easily ionizable compound can produce low-energy photoelectron at UV-irradiation, and the ionization of determinand can be through following two processes: 1, photoelectron is adsorbed onto determinand, makes its ionization; 2, photoelectron is adsorbed onto the photochemically reactive product O of carrier gas
3On, obtain O
3 -O
3 -Or its hydrated ion O
3 -(H
2O)
nReact as reagent ion and explosive and other electronegativity compounds, make determinand obtain ionization.
Fig. 2-6 has provided some experiment spectrograms the present invention has been given and explanation.Except special proposition; The experiment condition of these spectrograms is: migration tube length is 8.8cm; Migration electric field intensity is 245.45V/cm, and the ion gate time of opening the door is 0.2ms, and the cycle is 50ms; Float gas and sample carrier gas and be the pressurized air of handling through silica gel, activated charcoal and molecular sieve, wherein moisture content is lower than 10ppm.Float gas velocity 600ml/min, flow rate of carrier gas 400ml/min, the migration tube temperature keeps 90 ℃, 180 ℃ of injector temperature.The easily ionizable compound that mixes is an acetone, adds in the carrier gas through the bottle head space that has permeable membrane.
Fig. 2 is the ion mobility spectrometry background signal figure of ultraviolet light photo from source doping easily ionizable compound, the reactive ion signal graph that promptly forms, and as can be seen from the figure the transit time of reactive ion is 10.01ms.
Embodiment 1
Fig. 3 provides is the ion mobility spectrometry figure of the TNT that records when under above experiment condition, undoping acetone, when as can be seen from the figure undoping acetone to not response of TNT.
Fig. 4 provides is the ion mobility spectrometry figure of the TNT that under above experiment condition, records, and as can be seen from the figure the transit time at the product ion peak that forms of TNT is 15.64ms.
Embodiment 3
Fig. 5 provides is the ion mobility spectrometry figure of the AFNO that under above experiment condition, records, and as can be seen from the figure the transit time at the product ion peak that forms of AFNO is 11.94ms.
Embodiment 4
Fig. 6 provides is the ion mobility spectrometry figure of the DINA that under above experiment condition, records, and as can be seen from the figure the transit time at the product ion peak that forms of DINA is 18.37ms.
Claims (5)
1. the method for identification and explosive detection: it is characterized in that: adopt ion mobility spectrometry that ultraviolet source makes ionization source as detecting instrument; Reaction zone in the transference tube of ion mobility spectrometry feeds the easily ionizable compound of gaseous state; Through the irradiation of ultraviolet light, ion mobility spectrometry detects explosive under negative ion mode;
Reactive ion concentration can be regulated through regulating the easily ionizable compound concentrations, realizes the highly sensitive detection of explosive.
2. method according to claim 1 is characterized in that:
Do carrier gas and float gas with air, feed carrier gas in reaction zone, doping easily ionizable compound in carrier gas, reactive ion concentration can be regulated through doping easily ionizable compound concentrations in the adjusting carrier gas, realizes the highly sensitive detection of explosive.
3. method according to claim 1 is characterized in that:
Said ultraviolet source is the equipment that vacuum UV lamp, diode, xenon lamp, mercury lamp or ultraviolet laser etc. can produce ultraviolet light.
4. method according to claim 1 and 2 is characterized in that: described easily ionizable compound is the compound that ionization energy is lower than used ultraviolet source photon energy.
5. method according to claim 1 and 2 is characterized in that: described easily ionizable compound is a kind of in acetone, benzene, the toluene or mixes more than two kinds.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512946A (en) * | 2012-06-29 | 2014-01-15 | 中国科学院大连化学物理研究所 | Method for identifying explosives by using ion mobility spectrometry through variable voltage mode |
| CN103675088A (en) * | 2012-09-13 | 2014-03-26 | 中国科学院大连化学物理研究所 | Method for rapidly separating and detecting mixed explosives |
| CN103811265A (en) * | 2012-11-09 | 2014-05-21 | 中国科学院大连化学物理研究所 | Doping agent auxiliary ionization source and application thereof in ion mobility spectrometry |
| CN103854948A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High magnetic field asymmetrical and suction compound ion migration spectrometer |
| CN103884770A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Method for detecting explosive |
| CN104713997A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Apparatus and method for rapidly detecting solid-state inorganic salts in soil |
| CN104713940A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Novel on-fingerprint prohibited good spectrum detection device and method and application thereof |
| CN105548327A (en) * | 2014-10-28 | 2016-05-04 | 中国科学院大连化学物理研究所 | Rapid detection for improving sensitivity of ion mobility spectrometry |
| CN105628783A (en) * | 2014-10-28 | 2016-06-01 | 中国科学院大连化学物理研究所 | Application of reagent molecules in ion mobility spectrometry detection of explosive peroxide HMTD |
| CN106226384A (en) * | 2016-09-22 | 2016-12-14 | 大连工业大学 | A kind of trimethylamine detection method based on Ion mobility spectrometry |
| CN106501346A (en) * | 2016-09-22 | 2017-03-15 | 大连工业大学 | A kind of method of trimethylamine in quick detection aquatic products |
| CN106841367A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | A kind of Ion transfer spectrum detection method of time resolution Dynamic Thermal parsing |
| CN107037114A (en) * | 2015-12-18 | 2017-08-11 | 莫福探测仪器有限责任公司 | The photoionization aided in by dopant is come detection compound |
| CN109030611A (en) * | 2018-06-20 | 2018-12-18 | 中国农业科学院茶叶研究所 | Method for distinguishing is sentenced in a kind of quick, the lossless fingerprint analysis of green tea fragrance and odor type based on ion mobility spectrometry |
| CN109781827A (en) * | 2017-11-13 | 2019-05-21 | 中国科学院大连化学物理研究所 | The cation of Propofol migrates spectrum detection method in a kind of expiratory air |
| CN109900835A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院大连化学物理研究所 | The device of inorganic constituents and application in a kind of highly sensitive on-line checking cigarette ash |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512946B (en) * | 2012-06-29 | 2015-09-23 | 中国科学院大连化学物理研究所 | A kind of ion mobility spectrometry is by the method for time variant voltage pattern-recognition explosive |
| CN103512946A (en) * | 2012-06-29 | 2014-01-15 | 中国科学院大连化学物理研究所 | Method for identifying explosives by using ion mobility spectrometry through variable voltage mode |
| CN103675088A (en) * | 2012-09-13 | 2014-03-26 | 中国科学院大连化学物理研究所 | Method for rapidly separating and detecting mixed explosives |
| CN103811265A (en) * | 2012-11-09 | 2014-05-21 | 中国科学院大连化学物理研究所 | Doping agent auxiliary ionization source and application thereof in ion mobility spectrometry |
| CN103854948A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High magnetic field asymmetrical and suction compound ion migration spectrometer |
| CN103884770A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Method for detecting explosive |
| CN103884770B (en) * | 2012-12-19 | 2016-12-28 | 中国科学院大连化学物理研究所 | A kind of detection method of explosive |
| CN104713940A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Novel on-fingerprint prohibited good spectrum detection device and method and application thereof |
| CN104713997A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Apparatus and method for rapidly detecting solid-state inorganic salts in soil |
| CN105548327A (en) * | 2014-10-28 | 2016-05-04 | 中国科学院大连化学物理研究所 | Rapid detection for improving sensitivity of ion mobility spectrometry |
| CN105628783A (en) * | 2014-10-28 | 2016-06-01 | 中国科学院大连化学物理研究所 | Application of reagent molecules in ion mobility spectrometry detection of explosive peroxide HMTD |
| CN106841367A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | A kind of Ion transfer spectrum detection method of time resolution Dynamic Thermal parsing |
| CN107037114A (en) * | 2015-12-18 | 2017-08-11 | 莫福探测仪器有限责任公司 | The photoionization aided in by dopant is come detection compound |
| CN106226384A (en) * | 2016-09-22 | 2016-12-14 | 大连工业大学 | A kind of trimethylamine detection method based on Ion mobility spectrometry |
| CN106501346A (en) * | 2016-09-22 | 2017-03-15 | 大连工业大学 | A kind of method of trimethylamine in quick detection aquatic products |
| CN106501346B (en) * | 2016-09-22 | 2019-08-13 | 大连工业大学 | A kind of method of trimethylamine in quick detection aquatic products |
| CN106226384B (en) * | 2016-09-22 | 2019-08-13 | 大连工业大学 | A kind of trimethylamine detection method based on Ion mobility spectrometry |
| CN109781827A (en) * | 2017-11-13 | 2019-05-21 | 中国科学院大连化学物理研究所 | The cation of Propofol migrates spectrum detection method in a kind of expiratory air |
| CN109900835A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院大连化学物理研究所 | The device of inorganic constituents and application in a kind of highly sensitive on-line checking cigarette ash |
| CN109030611A (en) * | 2018-06-20 | 2018-12-18 | 中国农业科学院茶叶研究所 | Method for distinguishing is sentenced in a kind of quick, the lossless fingerprint analysis of green tea fragrance and odor type based on ion mobility spectrometry |
| CN109030611B (en) * | 2018-06-20 | 2021-09-10 | 中国农业科学院茶叶研究所 | Rapid and lossless green tea aroma fingerprint analysis and aroma type discrimination method based on ion mobility spectrometry |
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Application publication date: 20120530 |