CN102147340B - Preconcentration device and method for ionic migration detection equipment - Google Patents
Preconcentration device and method for ionic migration detection equipment Download PDFInfo
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- CN102147340B CN102147340B CN 201010621592 CN201010621592A CN102147340B CN 102147340 B CN102147340 B CN 102147340B CN 201010621592 CN201010621592 CN 201010621592 CN 201010621592 A CN201010621592 A CN 201010621592A CN 102147340 B CN102147340 B CN 102147340B
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Abstract
The invention relates to a preconcentration device and method for ionic migration detection equipment, belonging to the field of application technologies for ionic migration detection. According to one aspect of the invention, the disclosed preconcentration device for ionic migration detection equipment comprises a collection channel, a filter screen, a first desorption unit and a second desorption unit, and a drive device, wherein the filter screen is provided with mutually spaced first and second adsorption zones along a lengthwise direction, and is received in the first and the second desorption units in a winding state; when the first adsorption zone is transported to the first desorption unit for desorption, while the second adsorption zone is transported to the second desorption unit for desorption; and when one of the first and the second adsorption zones is arranged in an adsorption site, the other of the first and the second adsorption zones is arranged in a desorption site.
Description
The application is the dividing an application for the patented claim of " the pre-concentration device and the pre-concentration method that are used for ion migration checkout equipment " that 200910243777.X, the applying date be on Dec 24th, 2009, denomination of invention for application number.
Technical field
The invention belongs to the applied technical field that the ion migration detects.Specifically, the present invention relates to a kind of pre-concentration technology that checks drugs, explosive and other material, this technology can be carried out pre-concentration to drugs, explosive and other material grains that floats in the air.More particularly, the present invention relates to a kind of pre-concentration device and pre-concentration method for ion migration checkout equipment.
Background technology
In the prior art, comprise following two kinds for detection of the gas sampling method in the IMS instrument of drugs, explosive and other material: a kind of is not have the continuous sample introduction of gas pre-concentration processing links, the analytical approach of continuous sampling; A kind of is the analytical approach with independently gas pre-concentration processing, gas sampling.
But, in the analytical approach of independently gas pre-concentration processing, gas sampling, on the one hand, need when materials such as the airborne drugs of collection, explosive, provide bigger contact area, to increase the degree of absorption to detected material; On the other hand, need when detecting, obtain higher material volatilization concentration again, to improve the accuracy of detection of IMS instrument.But the volatilization concentration of material is not high enough when absorption phase provides bigger contact area often to make in desorption, thereby makes the detection sensitivity of IMS not high.
In addition, the gas pre-concentration is handled, the gas sampling step owing to adopt independently, need carry out a gas sampling step again after a pre-concentration is finished dealing with usually, so constantly repeats, thereby has influenced the detection efficiency of equipment.
Summary of the invention
Given this, purpose of the present invention is intended to solve at least one aspect of the above-mentioned problems in the prior art and defective.
Correspondingly, one of purpose of the present invention is to provide a kind of pre-concentration device and pre-concentration method for ion migration checkout equipment, and it can improve the detection sensitivity of ion migration equipment effectively.
Another object of the present invention is to provide a kind of pre-concentration device and pre-concentration method for ion migration checkout equipment, it can improve the detection efficiency of ion migration equipment effectively.
According to an aspect of the present invention, it provides a kind of pre-concentration device for ion migration checkout equipment, comprising: collection channel is used for collecting the gaseous mixture that comprises detected material; Filter screen, it is arranged in the described collection channel with deployed condition, is used for described filter screen is separated and be adsorbed onto to detected material from described gaseous mixture, and wherein said filter screen has spaced first, second adsorption zone along its longitudinally; The first and second desorption unit, the detected material that is used for will being adsorbed onto on the filter screen carries out desorption, and wherein said filter screen is contained in the described first and second desorption unit with reeling condition; Drive unit, it is mobile between absorption position reconciliation absorption position that it is used for driving described filter screen, and wherein at absorption position, described detected material is adsorbed on the described filter screen in described collection channel, in described desorption position, described detected material desorption from the filter screen; And wherein first adsorption zone is transported to and carries out desorption operation in the first desorption unit, and second adsorption zone is transported to and carries out the desorption operation in the second desorption unit; And when being positioned at absorption position for one in described first, second adsorption zone, another in described first, second adsorption zone is positioned at the desorption position.
Particularly, each desorption unit comprises: filter screen reel, described filter screen can be wound onto on the described filter screen reel and from described filter screen reel and launch; And cartridge heater, it comprises that heating unit is to heat the filter screen that is wound on the described filter screen reel that is contained in wherein.
In a kind of embodiment, described cartridge heater comprises: the cylindrical shell of both ends open and the heating cover that is connected to described cylindrical shell one end; Described heating unit comprises: be connected to interior calandria and outer calandria that described cartridge heater covers, wherein said interior calandria is arranged on the inboard of described filter screen reel, and described outer calandria is arranged on the outside of described filter screen reel.
Further, described pre-concentration device also comprises: be arranged on described cartridge heater and cover bleeding point with the intracavity inter-connection of described cartridge heater, it is used for the injection port that will derive described cartridge heater and import to the IMS detector from the detected material that filter screen is separated.
Particularly, described filter screen reel is hollow cage shape, and its cylindrical shell other end by described cartridge heater is inserted in the described cartridge heater, and can be under the driving of described drive unit forward and backward rotation.
According to an aspect of the present invention, it provides a kind of gaseous mixture to ion migration checkout equipment to carry out pre-concentration method, comprises step:
(A) provide aforesaid pre-concentration device;
(B) gaseous mixture that will comprise detected material imports on the described filter screen that is in deployed condition to carry out adsorption operations at absorption position;
(C) start described drive unit, so that filter screen imports in the described desorption unit with coiling form, operate to carry out desorption in the desorption position;
(D) after described desorption operation is finished, start described drive unit, so that filter screen is returned on the described absorption position.
Preferably, this pre-concentration method also comprises step (E): repeated execution of steps (B)-(D).
In a kind of embodiment, described desorption operation comprises that the filter screen to being contained in coiling form in the described desorption unit carries out heating steps.
According to a further aspect in the invention, it provides a kind of gaseous mixture to ion migration checkout equipment to carry out pre-concentration method, comprises step:
(a) provide aforesaid pre-concentration device;
(b) gaseous mixture that will comprise detected material imports on first adsorption zone of described filter screen, to carry out adsorption operations at first absorption position;
(c) start described drive unit, import in the described first desorption unit with first adsorption zone with filter screen, to carry out the desorption operation in the first desorption position;
(d) in execution in step (c), will comprise that the gaseous mixture of detected material imports on second adsorption zone of described filter screen, to carry out adsorption operations at second absorption position;
(e) after the desorption operation of first adsorption zone is finished, start described drive unit, import in the described second desorption unit with second adsorption zone with filter screen, to carry out the desorption operation in the second desorption position;
(f) in execution in step (e), first adsorption zone of described filter screen is turned back on described first absorption position.
Preferably, this pre-concentration method also comprises step (g): repeated execution of steps (b)-(f), so that entire work process constantly moves in circles.
Above-mentioned not specific embodiment of the present invention has advantage and the effect of following one or more aspect at least:
1. when pre-concentration, filter screen is in deployed condition, and it is with materials such as the drugs that suspend in the bigger area absorbed air or explosives; When detecting, filter screen is in reeling condition, make its volatilization in less space by type of heating the material that adsorbs on the filter screen simultaneously, can improve the concentration of material in the pre-concentration device that volatilizes like this, so more be conducive to the detection of ion migration equipment, play a part crucial to obtaining higher detection sensitivity.
2. filter screen is automatically withdrawn in the cartridge heater under the driving of drive unit, and is wrapped on the filter screen reel or from cartridge heater with coiling form and extracts out, to form the expansion form.Automatically finish under the above-mentioned driving of conversion at drive unit of conciliating adsorption operations in absorption, improved detection efficiency thus.
3. in a preferred embodiment, this device can be installed on two cover cartridge heaters and drugs, explosive detection instrument (IMS), the filter screen two adsorption zones, two desorption unit are set.When two cover cartridge heaters and drugs, explosive detection instrument (IMS) are installed, wherein a cover is in detected state, and the another set of holding state that is in, when being positioned at absorption position for one in described first, second adsorption zone, in described first, second adsorption zone another is positioned at the desorption position, so continuous reciprocation cycle under the driving of driving mechanism, thus detection efficiency further improved.
Description of drawings
With reference to the accompanying drawings the pre-concentration device and the pre-concentration method that are used for ion migration checkout equipment according to embodiment of the present invention are described, wherein:
Fig. 1 is the front view that shows according to the pre-concentration device that is used for ion migration checkout equipment of one embodiment of the present invention;
Fig. 2 shows the above-mentioned vertical view that moves the pre-concentration device of checkout equipment for ion;
Fig. 3 shows the above-mentioned upward view that moves the pre-concentration device of checkout equipment for ion;
Fig. 4 shows the above-mentioned left view that moves the pre-concentration device of checkout equipment for ion;
Fig. 5 is the sectional view that shows the cartridge heater of above-mentioned pre-concentration device for ion migration checkout equipment;
Fig. 6 is the stereographic map that shows the filter screen reel of above-mentioned pre-concentration device for ion migration checkout equipment; And
Fig. 7 is the process flow diagram that shows according to the pre-concentration method that is used for ion migration checkout equipment of one embodiment of the present invention.
In the accompanying drawings, the parts of drawing reference numeral indication are as follows: 1-collection channel, 2-centrifugal blower or fan, 3,3 '-drugs, explosive detection instrument (IMS), 4,4 '-cartridge heater, 5-base, 6-filter screen, the 7-synchronizing wheel, the 8-drive motor, 9-is with synchronously, the 10-bleeding point, 11-cartridge heater top cover, the inner calandria of 12-, 13-external heating body, 14-filter screen reel, 15-synchronizing wheel coupling shaft, 16-external heating piece, 40-desorption unit, the 60-driver element, first, second adsorption zone of 61,62-, the 101-inner chamber, the 102-interface channel
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.In instructions, same or analogous drawing reference numeral is indicated same or analogous parts.Following explanation to embodiment of the present invention is intended to present general inventive concept of the present invention is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present invention.
Referring to Fig. 1-6, the pre-concentration device that is used for ion migration checkout equipment that it shows a preferred embodiment of the invention comprises: collection channel 1 is used for collecting the gaseous mixture that comprises detected material; Filter screen 6, it is arranged in the described collection channel 1 with deployed condition, is used for described filter screen 6 is separated and be adsorbed onto to detected material from described gaseous mixture; At least one desorption unit 40, its detected material that is used for will being adsorbed onto on the filter screen 6 carries out desorption, and wherein said filter screen 6 is contained in the described desorption unit 40 with reeling condition; And drive unit 60, it is used for driving described filter screen 6 and conciliates between the absorption position mobile at absorption position, wherein at absorption position, described detected material is adsorbed on the described filter screen 6 in described collection channel 1, in described desorption position, described detected material in described at least one desorption unit 40 from the filter screen 6 desorption.
Referring to Fig. 2, in the above-described embodiment, collection channel 1 can be connected with the collection channel (not shown) of IMS instrument gate-type human body safety inspection system, will comprise the detected material of separating from human body, for example the gaseous mixture of drugs, explosive and other suspicious particle imports in this pre-concentration device.Referring to Fig. 5 and 6, desorption unit 40 comprises: filter screen reel 14, described filter screen 6 can be wound onto on the described filter screen reel 14 and from described filter screen reel 14 and launch; And cartridge heater 4, it comprises that heating unit 12,13 is to heat the filter screen 6 that is wound on the described filter screen reel 14 that is contained in wherein.
Further as shown in Figure 5, cartridge heater 4 comprises: the cylindrical shell 41 of both ends open and the heating cover 11 that is connected to described cylindrical shell 41 1 ends (upper end among Fig. 5).As shown in Figure 6, described filter screen reel 14 is hollow cage shape, and its other end by the cylindrical shell 41 of described cartridge heater 4 (lower end among Fig. 5) is inserted in the described cartridge heater 4, and can be under the driving of described drive unit 60 forward and backward rotation.Referring to Fig. 5, heating unit comprises: be connected to interior calandria 12 and outer calandria 13 on the described heating cover 11, wherein said interior calandria 12 is arranged on the inboard of described filter screen reel 14, and described outer calandria 13 is arranged on the outside of described filter screen reel 14.By above-mentioned setting, in desorption operation, the filter screen that is wound on filter screen reel 14 is clipped in the small space between outer calandria 13 and the interior calandria 12, thereby guarantees that desorption unit 40 can provide bigger volatilization concentration.
Outer calandria 13 and interior calandria 12 can adopt various suitable forms, and for example in a kind of form shown in Figure 5, external heating body 13 comprises the external heating piece 16 that is embedded in its main body, for example resistance heated piece, electromagnetic induction heating piece etc.In a kind of change embodiment, external heating body 13 also can adopt the form of the external heating piece 16 in the cylindrical shell 41 that is embedded into cartridge heater 4.Outer calandria 13 and interior calandria 12 can be by various suitable modes, and for example modes such as welding, rivet clasp are connected to cartridge heater 4, for example on the heating cover 11 of cartridge heater 4.
Further referring to Fig. 6, because described filter screen reel 14 is hollow cage shape, in the desorption operation, the detected material of absorption on it, for example the gaseous mixture of drugs, explosive and other suspicious particle evaporates, and can penetrate screen pack reel 14 and diffuses to outer calandria 13 and interior calandria 12 is defined among the small space S between it.As shown in Figure 6, be respectively arranged with the interface channel 102 that is communicated with the inner chamber 101 of cartridge heater 4 in the top and bottom of above-mentioned space S, can enter into this inner chamber 101 with the detected material of guaranteeing to evaporate, further to detect.In Fig. 5, the pre-concentration device also comprises: be arranged on the bleeding point 10 that is connected with the inner chamber 101 of described cartridge heater 4 on the described heating cover 11, it is used for the injection port (not shown) that will derive described cartridge heater 4 and import to IMS detector 3 from the detected material that filter screen 6 is separated.
In the preferred embodiment shown in Fig. 1-4, this pre-concentration device comprises the first and second desorption unit 40,40 '; Described filter screen 6 has spaced first, second adsorption zone 61 along its longitudinally, 62, wherein first adsorption zone 61 is transported to and carries out desorption operation in the first desorption unit 40, and second adsorption zone 62 is transported to and carries out the desorption operation in the second desorption unit 40 '.Further, referring to Fig. 2,3 and 5, drive unit 60 comprises: drive motor 8; A plurality of synchronizing wheels 7, in described a plurality of synchronizing wheels one links to each other with described filter screen reel 14 by synchronizing wheel coupling shaft 15, to drive described filter screen reel 14 rotations; And be with 9 synchronously, it connects described a plurality of synchronizing wheel 7 and described drive motor 8 drives forward and reverse rotation down, drives the 14 forward and reverse rotations of filter screen reel by synchronizing wheel coupling shaft 15 thus.And then filter screen reel 14 drives filter screen 6 and moves back and forth between absorption position reconciliation absorption position, thereby has improved detection efficiency.Specifically, when being positioned at absorption position for one in described first, second adsorption zone 61,62, another in described first, second adsorption zone 61,62 is positioned at the desorption position.
Referring to Fig. 1, above-mentioned pre-concentration can further include first, second centrifugal blower or fan 2,2 ', and it is arranged in the described collection channel 1 will comprise described first, second adsorption zone 61,62 of gaseous mixture guiding of detected material.With two desorption unit of above-mentioned employing 40,40 '; The embodiment of first, second adsorption zone 61,62 and first, second centrifugal blower 2,2 ' is corresponding, and this device can be installed two cover cartridge heaters and drugs, explosive detection instrument 3,3 '.When two cover cartridge heaters and drugs, explosive detection instrument 3,3 ' (IMS) were installed, wherein a cover detector 3 was in detected state, and another set of detector 3 ' is in holding state.
Refer again to Fig. 1-6, above-mentioned cartridge heater 4,4 '; Collection channel 1 and centrifugal blower or fan 2 all can be installed on the base 5.Shown in 2 and 3, as the drive motor 8 of drive unit 60; Synchronizing wheel 7, and synchronously with in 9 lower space that can be installed in base 5.Though above-mentioned each component arrangement orientation and position are enumerated, this enumerating is not restrictive, but illustrative.
Below in conjunction with accompanying drawing 1-7 the gaseous mixture to ion migration checkout equipment according to the embodiment of the present invention being carried out pre-concentration method describes.As shown in Figure 7, provide as the described pre-concentration device of Fig. 1-6 (step a); The gaseous mixture that will comprise detected material imports on first adsorption zone 61 of described filter screen 6, to carry out adsorption operations (step b) at first absorption position; Start described drive unit 60, import in the described first desorption unit 40 with first adsorption zone 61 with filter screen 6, to carry out desorption operation (step c) in the first desorption position; In execution in step (c), will comprise that the gaseous mixture of detected material imports on second adsorption zone 62 of described filter screen 6, to carry out adsorption operations (step d) at second absorption position; After the desorption operation of first adsorption zone 61 is finished, start described drive unit 60, import in the described second desorption unit 40 ' with second adsorption zone 62 with filter screen, to carry out desorption operation (step e) in the second desorption position; In execution in step (e), make first adsorption zone 61 of described filter screen 6 turn back to (step f) on described first absorption position.
Further, repeated execution of steps (b)-(f) then can make whole pre-concentration process constantly move in circles.
Particularly, after system was ready, centrifugal blower or fan 2 started, and air flows through from collection channel 1, and 61 pairs of first adsorption zones on the filter screen 6 flow through airborne material in the collection channel 1 and filter and adsorb simultaneously.Because this moment, filter screen was arranged in the collection channel 1 with the expansion form, thereby guarantee the contact area that it is fully big with the air mixture that comprises detected material, thereby provide precondition for improving the sensitivity that detects.
After work a period of time, centrifugal blower or fan 2 stop, and drive motor 8 work drive synchronizing wheel 7 and are with 9 rotations synchronously, are connected first adsorption zone 61 of the filter screen reel 14 beginning folding and unfolding filter screens 6 on the synchronizing wheel coupling shaft 15.When first adsorption zone 61 of filter screen 6 was involved in left side cartridge heater 4, another part of filter screen 6 was second adsorption zone 62 of filter screen 6, extracts out from right side cartridge heater 4.After first adsorption zone 61 of filter screen 6 was rolled into left side cartridge heater 4, the inside calandria 12 of left side cartridge heater 4 and external heating body 13 began filter screen 6 is heated, and at this moment the material of absorption begins to evaporate in the inner chamber of left side cartridge heater 4 on the filter screen 6.Because when detecting, filter screen 6 is in reeling condition, material with absorption on the filter screen 6 makes its volatilization in less space S by type of heating simultaneously, can improve the concentration of material in the pre-concentration device that volatilizes like this, so more be conducive to the detection of drugs, explosive detection instrument (IMS) 3, play a part crucial to obtaining higher detection sensitivity.
After above-mentioned desorption operation was finished, left side drugs, explosive detection instrument (IMS) 3 detected by the gas that the bleeding point 10 on the left side cartridge heater 4 extracts in the cartridge heater 4 of left side.Carry out desorption and/or drugs at left side cartridge heater 4, when explosive detection instrument (IMS) 3 detects, centrifugal blower or fan 2 start simultaneously, second adsorption zone 62 of filter screen 6 filters and adsorbs flowing through in the collection channel 1 airborne material again.Treat that left side cartridge heater 4 and/or drugs, explosive detection instrument (IMS) 3 detect and finish and after centrifugal blower or fan 2 quit work, drive motor 8 starts again, drive synchronizing wheel 7 and be with 9 rotations synchronously, be connected the filter screen reel 14 beginning folding and unfolding filter screens 6 on the synchronizing wheel coupling shaft 15.When second adsorption zone 62 of filter screen 6 was involved in right side cartridge heater 4, another part of filter screen 6 i.e. first adsorption zone 61 was extracted out from left side cartridge heater 4.After filter screen 6 is rolled into right side cartridge heater 4, the inside calandria 12 of right side cartridge heater 4 and external heating body 13 begin second adsorption zone of filter screen 6 is heated, at this moment the material of absorption begins to evaporate in the inner chamber of right side cartridge heater 4 on second adsorption zone 62 of filter screen 6, and right side drugs, explosive detection instrument (IMS) 3 extract the right gas of surveying in the cartridge heater 4 by the bleeding point 10 on the right side cartridge heater 4 and detect.
By repeating above-mentioned steps, can make the constantly back and forth operation of the above-mentioned course of work, thereby further improve detection efficiency.
Though in above preferred embodiment, it is in conjunction with adopting two cover desorption unit 40,40 ' and drugs, explosive detection instrument (IMS) 3,3 ' structure is illustrated pre-concentration method of the present invention, but the present invention is not limited to this, when adopting a cover desorption unit 40,40 ' and drugs, explosive detection instrument (IMS) 3, in the time of 3 ', it can realize the effect of pre-concentration equally.
Particularly, when only adopting a desorption unit 4; Adsorption zone 61 and a centrifugal blower 2 and a cover cartridge heater and drugs, explosive detection instrument (IMS) 3 o'clock (steps A), its operation steps is as follows: the gaseous mixture that will comprise detected material imports on the described filter screen 6 that is in deployed condition to carry out adsorption operations (step B) at absorption position; Start described drive unit 60, so that filter screen 6 imports in the described desorption unit 40 with coiling form, operate (step C) to carry out desorption in the desorption position; After described desorption operation is finished, start described drive unit 60, so that filter screen 6 is returned to (step D) on the described absorption position.Repeated execution of steps (B)-(D) can make the constantly back and forth operation of the above-mentioned course of work.
Though some embodiment of general plotting of the present invention are shown and explanation, those skilled in the art will appreciate that, under the situation of the principle that does not deviate from this present general inventive concept and spirit, can make a change these embodiment, scope of the present invention limits with claim and their equivalent.
Claims (8)
1. one kind is used for the pre-concentration device that ion moves checkout equipment, comprising:
Collection channel is used for collecting the gaseous mixture that comprises detected material;
Filter screen, it is arranged in the described collection channel with deployed condition, is used for described filter screen is separated and be adsorbed onto to detected material from described gaseous mixture, and wherein said filter screen has spaced first, second adsorption zone along its longitudinally;
The first and second desorption unit, the detected material that is used for will being adsorbed onto on the filter screen carries out desorption, and wherein said filter screen is contained in the described first and second desorption unit with reeling condition;
Drive unit, it is mobile between absorption position reconciliation absorption position that it is used for driving described filter screen, and wherein at absorption position, described detected material is adsorbed on the described filter screen in described collection channel, in described desorption position, described detected material desorption from the filter screen; And
Wherein first adsorption zone is transported to and carries out desorption operation in the first desorption unit, and second adsorption zone is transported to and carries out the desorption operation in the second desorption unit; And
When being positioned at absorption position for one in described first, second adsorption zone, another in described first, second adsorption zone is positioned at the desorption position.
2. pre-concentration device according to claim 1 is characterized in that each desorption unit comprises:
Filter screen reel, described filter screen can be wound onto on the described filter screen reel and from described filter screen reel and launch; And
Cartridge heater, it comprises that heating unit is to heat the filter screen that is wound on the described filter screen reel that is contained in wherein.
3. pre-concentration device according to claim 2 is characterized in that:
Described cartridge heater comprises: the cylindrical shell of both ends open and the heating cover that is connected to described cylindrical shell one end;
Described heating unit comprises: be connected to interior calandria and outer calandria that described cartridge heater covers, wherein said interior calandria is arranged on the inboard of described filter screen reel, and described outer calandria is arranged on the outside of described filter screen reel.
4. pre-concentration device according to claim 3 is characterized in that also comprising:
Be arranged on described cartridge heater and cover bleeding point with the intracavity inter-connection of described cartridge heater, it is used for the injection port that will derive described cartridge heater and import to the IMS detector from the detected material that filter screen is separated.
5. pre-concentration device according to claim 3 is characterized in that:
Described filter screen reel is hollow cage shape, and its cylindrical shell other end by described cartridge heater is inserted in the described cartridge heater, and can be under the driving of described drive unit forward and backward rotation.
6. the gaseous mixture to ion migration checkout equipment carries out pre-concentration method, comprises step:
(a) provide pre-concentration device as claimed in claim 1;
(b) gaseous mixture that will comprise detected material imports on first adsorption zone of described filter screen, to carry out adsorption operations at first absorption position;
(c) start described drive unit, import in the described first desorption unit with first adsorption zone with filter screen, to carry out the desorption operation in the first desorption position;
(d) in execution in step (c), will comprise that the gaseous mixture of detected material imports on second adsorption zone of described filter screen, to carry out adsorption operations at second absorption position;
(e) after the desorption operation of first adsorption zone is finished, start described drive unit, import in the described second desorption unit with second adsorption zone with filter screen, to carry out the desorption operation in the second desorption position;
(f) in execution in step (e), first adsorption zone of described filter screen is turned back on described first absorption position.
7. pre-concentration method according to claim 6 is characterized in that:
(g) repeated execution of steps (b)-(f).
8. pre-concentration method according to claim 6 is characterized in that:
Described desorption operation comprises that the filter screen to being contained in coiling form in the described desorption unit carries out heating steps.
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| CN 201010621592 CN102147340B (en) | 2009-12-24 | 2009-12-24 | Preconcentration device and method for ionic migration detection equipment |
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| CN 201010621592 CN102147340B (en) | 2009-12-24 | 2009-12-24 | Preconcentration device and method for ionic migration detection equipment |
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| CN102109432B (en) | 2009-12-24 | 2012-12-12 | 同方威视技术股份有限公司 | Pre-concentration apparatus and method for ionic migration detection device |
| CN103163275B (en) * | 2011-12-16 | 2016-08-24 | 同方威视技术股份有限公司 | The detection device of article surface dangerous substance and detection method |
| CN105097410A (en) * | 2014-05-20 | 2015-11-25 | 中国科学院大连化学物理研究所 | Autoinjection type ion mobility spectrometer |
| CN111773900B (en) * | 2020-07-07 | 2021-06-25 | 浙江工贸职业技术学院 | On-line detection and purification device applied to volatile organic compounds in industrial waste gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6171378B1 (en) * | 1999-08-05 | 2001-01-09 | Sandia Corporation | Chemical preconcentrator |
| CN101600960A (en) * | 2006-12-20 | 2009-12-09 | 史密斯探测-沃特福特有限公司 | Checkout equipment |
| CN102109432B (en) * | 2009-12-24 | 2012-12-12 | 同方威视技术股份有限公司 | Pre-concentration apparatus and method for ionic migration detection device |
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| US7306649B2 (en) * | 2005-09-30 | 2007-12-11 | Advance Nanotech, Inc. | 3D miniature preconcentrator and inlet sample heater |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171378B1 (en) * | 1999-08-05 | 2001-01-09 | Sandia Corporation | Chemical preconcentrator |
| CN101600960A (en) * | 2006-12-20 | 2009-12-09 | 史密斯探测-沃特福特有限公司 | Checkout equipment |
| CN102109432B (en) * | 2009-12-24 | 2012-12-12 | 同方威视技术股份有限公司 | Pre-concentration apparatus and method for ionic migration detection device |
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