CN203288556U - Membrane filtration device for asymmetric ion mobility spectrum - Google Patents
Membrane filtration device for asymmetric ion mobility spectrum Download PDFInfo
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- CN203288556U CN203288556U CN2013203330574U CN201320333057U CN203288556U CN 203288556 U CN203288556 U CN 203288556U CN 2013203330574 U CN2013203330574 U CN 2013203330574U CN 201320333057 U CN201320333057 U CN 201320333057U CN 203288556 U CN203288556 U CN 203288556U
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Abstract
The utility model discloses a membrane filtration device for an asymmetric ion mobility spectrum. The membrane filtration device comprises a sample introduction seat, a sample introduction cover and a membrane module. The sample introduction seat is provided with inner circulation channels used for communicating mobility regions. The sample introduction cover is fixedly arranged on the sample introduction seat and provided with sample introduction circulation channels communicated and coordinated with the inner circulation channels in the sample introduction seat. The membrane module is arranged between the sample introduction seat and the sample introduction cover in a sealing way and used for isolating the communicated sample introduction circulation channels and the inner circulation channels. With the application of the membrane filtration device, effects on the mobility regions from external environment can be prevented so that sample signal strength is enhanced.
Description
Technical field
The utility model relates to Ion mobility spectrometry, is specifically related to the filtering technique of asymmetric ion mobility spectrometry.
Background technology
Traditional ion mobility spectrometry is certain in electric field strength, is about under the low current field condition of 100-300V/CM, can think that a kind of ion mobility coefficient is constant, and the value of it and E/N is irrelevant, and wherein E is electric field strength, and N is the density of drift gas molecule.When increasing electric field strength E to some strength, when the E/N value increased, mobility will produce a kind of nonlinear dependence with the value of E/N.This pass between asymmetric ion mobility spectrometry is homo-ion with electric field just is basis and a kind of detection technique of design.
As shown in Figure 1, direction of an electric field and sample introduction direction are orthogonal to basic principle figure as seen from the figure, and common migration spectrum is parallel.Sample enters the effect that migration area is mainly air-flow, rather than the effect of electric field force.So the throughput in this system will be far longer than conventional ion migration spectrum, is approximately 1.4L/min.In this detection technique, the effect of electric field force is constantly to pull to two-plate between from the zone of center migration ion, different ions pulls to the two-plate neutralization in migration area distance is different, add different bucking voltages according to the characteristic of the sample that will detect, the sample ions that assurance will be surveyed is subjected to the electric field force effect less, the final detector that arrives, other unwanted ion is neutralized by two-plate halfway under the effect of electric field force, thereby reaches the function of qualitative detection.
But, because when the air-flow of large flow is written into migration area with sample, also can take the airborne impurity of background to migration area, thereby affect the resolution of instrument, assorted peak finally appears in signal detection process, cause the sample peak to differentiate, or occur that assorted peak causes wrong report, the abnormality such as fails to report.
The utility model content
When the utility model detected for existing asymmetric ion mobility spectrometry, external environment was large on the migration area impact, thereby affected the problem of instrumental resolution, and a kind of asymmetric ion mobility spectrometry film filter is provided.This device can prevent the impact of external environment on migration area, improves sample signal intensity.
In order to achieve the above object, the utility model adopts following technical scheme:
Asymmetric ion mobility spectrometry film filter, described filter comprises:
The sample introduction seat, be provided with in described sample introduction seat for the inner cycle channel that is communicated with migration area;
The sample introduction lid, described sample introduction lid is installed on the sample introduction seat, arranges and uses the sample introduction circulation canal in described sample introduction lid, and described sample introduction circulation canal is communicated with cooperation with the inner cycle channel in the sample introduction seat;
Membrane module, described membrane module sealing is arranged between sample introduction seat and sample introduction lid, and cuts off sample introduction circulation canal and the inner cycle channel that is communicated with.
In preferred embodiment of the present utility model, described membrane module is the pellicle assembly.
Further, be provided with black box between described sample introduction lid and sample introduction seat, described black box covers membrane module.
Further, described black box comprises sealing ring and the sealing gasket that cooperatively interacts, and described sealing ring surrounds membrane module from surrounding, and described sealing gasket is arranged in sealing ring, and covers membrane module.
Further, described sealing gasket is the expanded polytetrafluoroethyl(ne sealing gasket.
Further, described sample introduction circulation canal by being located in sample cavity in sample introduction lid, be arranged on the loop connecting groove on sample introduction lid connecting end surface and be arranged on the sample introduction gas outlet that sample introduction covers and form, described sample cavity covers connecting end surface by sample introduction and is communicated with the ring-type link slot with the gap between membrane module, and described loop connecting groove is communicated with the sample introduction gas outlet.
Further, described sample introduction covers at the injection port place of sample introduction circulation canal and is provided with heater.
Further, described heater is comprised of heater strip and heating wire cover.
The filter that the utility model provides effectively is isolated into two districts with sample introduction and migration, and guarantee that sample can fully enter into migration area, effectively avoid in signal detection process occurring assorted peak, cause the sample peak to differentiate, or occur that assorted peak causes wrong report, the abnormality such as fails to report.
Simultaneously, this device is simple and practical, use and install all very convenient, during use as long as directly be screwed into the sample tube core and just can use.Convenient succinct, need not also can directly screw down; Gone bad maintenance also very convenient with replacement.
Description of drawings
Further illustrate the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the basic principle figure of conventional ion migration spectrum;
Fig. 2 is cutaway view of the present utility model;
Fig. 3 is explosive view of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand,, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 2, the asymmetric ion mobility spectrometry film filter that the utility model provides, mainly be comprised of sample introduction seat 100, sample introduction lid 200 and membrane module 300.Wherein, be fixedly connected and form the agent structure of filter between sample introduction seat 100 and sample introduction lid 200, and be respectively arranged with inner cycle channel 101 and the sample introduction circulation canal 201 that is interconnected in sample introduction seat 100 and sample introduction lid 200, realize that detected sample enters into inner cycle channel 101 through sample introduction circulation canal 201, then entered into the migration area of migration tube by inner cycle channel 101; Membrane module 300 is arranged between sample introduction seat 100 and sample introduction lid 200 simultaneously, and the inner cycle channel 101 and the sample introduction circulation canal 201 that are interconnected in both are cut off, realization is filtered the sample that is entered into by sample introduction circulation canal 201 in inner cycle channel 101, with the airborne impurity filtering of background, avoiding it to enter migration area affects the resolution of instrument, thereby effectively improves sample signal intensity.
On the basis of such scheme, of the present utility modelly specifically be implemented as follows:
Referring to Fig. 3, it is depicted as the utility model and specifically implements the explosive view of structure.In instantiation, sample introduction seat 100 mainly is comprised of with interior circulation air inlet 104 pedestal 102, tube connector 103.
, for the ease of being fixedly connected with of sample introduction seat 100 and sample introduction lid 200, offer some connecting holes 106 on the 102b of the other end of sample introduction seat 100.
Simultaneously, at the end face 102b of sample introduction seat 100, be provided with membrane module 300 resettlement grooves 107, this resettlement groove 107 is positioned at the centre position of end face 102b.
This membrane module 300 is specially a pellicle, this film has affinity and easy permeability to organic gas molecule, and for the infiltration as difficult in hydrone, airborne dust granules etc. of inorganic large molecule, can reduce like this after impurity is ionized to enter migration area, in order to avoid assorted peak finally occurs in signal detection process, cause the sample peak can't differentiate or, occur that assorted peak causes wrong report, the abnormality such as fail to report.
This example also is provided with seal on sample introduction seat 100, by the seal, guarantee that effectively the sealing between sample introduction seat 100 and sample introduction lid 200 joins.The sealing function that forms by seal has guaranteed the isolation fully of air-flow between exocoel in the migration area, avoids occurring gas exchange phenomenon, has guaranteed that namely sample molecule can enter detection zone smoothly.
As shown in the figure, the seal is coordinated and is formed double sealing structure by sealing ring 108 and sealing gasket 109, wherein sealing ring 108 is placed on the end face 102b of pedestal 102 by corresponding resettlement groove 110, the radius of this resettlement groove 110 is greater than membrane module resettlement groove 107, thereby while making installation, membrane module 300 is positioned at the inside of sealing ring 108, guarantee thus the sealing installation between sample introduction seat and sample introduction lid, prevent that ambient atmos from entering migration area.
Referring to Fig. 3, in order to coordinate above-mentioned sample introduction seat 100, sample introduction in this example lid 200 mainly comprises a lid 202 and is arranged on sample introduction gas outlet 203 on lid 102.
The surrounding of lid 202 offers the connecting hole that matches with connecting hole 106 on pedestal 102, and by corresponding screw, pass connecting hole corresponding on lid 202 and pedestal 102, lid 202 and pedestal 102 are fixedly connected, realize being fixedly connected between sample introduction lid 200 and sample introduction seat 100.
Referring to Fig. 2, this example has provided a sample cavity 204 along its lid direction lid 202 is interior, inlet chamber 105 corresponding matching on this sample cavity 204 and pedestal 102; And lid 202 is provided with a loop connecting groove 205 on the end face with pedestal 102 matches, this loop connecting groove 205 is positioned at the surrounding of sample cavity 204, and with pedestal 102 on by spacing membrane module 300 corresponding matching of sealing gasket 109.Because sealing ring 108 and sealing gasket 109 are all ring-type, after realizing between lid 202 and pedestal 101 sealing, the connecting end surface of lid 202 and will have certain gap 206 between membrane module 300 parts in the middle of sealing gasket 109, by these gap 206 interior sample cavitys 204 of lid 202 will be positioned at its peripheral loop connecting groove 205 and be communicated with.
Sample introduction gas outlet 203 is arranged on the side of lid 202, is used for realizing being connected of sample introduction lid 100 and sample introduction pipeline.This sample introduction gas outlet 203 is communicated with the loop connecting groove 205 in lid 202.
Thus, the sample cavity 204 in lid 202 is communicated with ring-type link slot 205 by connecting end surface with the gap 206 between membrane module 300, then is communicated with sample introduction gas outlet connecting line 103, forms thus the interior sample introduction circulation canal 201(of sample introduction lid referring to Fig. 2).
The sample introduction circulation canal 201 and permeable membrane 300 corresponding matching that form by such scheme, make the sample introduction air-flow of the sample introduction circulation canal 201 of flowing through that most of sample is taken on permeable membrane 300, fully after infiltration, enter into again loop connecting groove 205 along permeable membrane 300 from peripheral sides, enter into sample introduction gas outlet 203 by loop connecting groove 205 again, then discharge, sample molecule contacts fully with film like this, guarantees the adequacy of sample introduction.
Residual on film in order to prevent sample, it is difficult to clean, and the injection port place of the sample cavity 204 of this example in the lid 202 of sample introduction lid 200 is equipped with a heater.concrete, this heater mainly is comprised of heater strip 207 and heating wire cover 208, this heater strip 207 is the resistance heating wire of ring-type, for the ease of the arrangement of heater strip 207 and form good heating effect, be provided with an annular boss 209 at the injection port place that is positioned on lid 202 free end faces, this annular boss 209 surrounds the injection port of sample cavity 204, and side is provided with for the ring-type heating tank 210 of settling heater strip 207 within it, this ring-type heating tank 210 surrounds the injection port of sample cavity 204 equally, make the heater strip 207 in ring-type heating tank 210 effectively to heat the sample by injection port.Simultaneously, offer a wire casing 211 on annular boss 209, be used for installing the wire of the heater strip 207 in ring-type heating tank 210.
Heating wire cover 208 is used for the heater strip 207 in ring-type heating tank 210 is fixed compression, it adopts the circulus that matches with ring-type heating tank 210, be fixed in annular boss 209 by hold-down screw, thereby heater strip 207 is pressed in ring-type heating tank 210.
The heater that forms thus, have not volatilely when running into, and when the difficult sample that cleans remains on film, strengthens the sample introduction air-flow, and give the Resistant heating in heater, promotes the quick volatilization of sample, reduces scavenging period.
When reality detects,, for identical sample and environment, install the test result that film filter that above-mentioned example obtains obtains additional and will be better than greatly not installing additional the test result that film filter obtains.
As, be all acetone to be tested having under the background of cigarette for two samples, adopt this film filter and the sample peak that records is significantly more than the sample peak that adopts this film filter to record.
Above demonstration and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (8)
1. asymmetric ion mobility spectrometry film filter, is characterized in that, described filter comprises:
The sample introduction seat, be provided with in described sample introduction seat for the inner cycle channel that is communicated with migration area;
The sample introduction lid, described sample introduction lid is installed on the sample introduction seat, arranges and uses the sample introduction circulation canal in described sample introduction lid, and described sample introduction circulation canal is communicated with cooperation with the inner cycle channel in the sample introduction seat;
Membrane module, described membrane module sealing is arranged between sample introduction seat and sample introduction lid, and cuts off sample introduction circulation canal and the inner cycle channel that is communicated with.
2. asymmetric ion mobility spectrometry film filter according to claim 1, is characterized in that, described membrane module is the pellicle assembly.
3. asymmetric ion mobility spectrometry film filter according to claim 1, is characterized in that, is provided with black box between described sample introduction lid and sample introduction seat, and described black box covers membrane module.
4. asymmetric ion mobility spectrometry film filter according to claim 3, it is characterized in that, described black box comprises sealing ring and the sealing gasket that cooperatively interacts, and described sealing ring surrounds membrane module from surrounding, described sealing gasket is arranged in sealing ring, and covers membrane module.
5. asymmetric ion mobility spectrometry film filter according to claim 4, is characterized in that, described sealing gasket is the expanded polytetrafluoroethyl(ne sealing gasket.
6. asymmetric ion mobility spectrometry film filter according to claim 4, it is characterized in that, described sample introduction circulation canal by being located in sample cavity in sample introduction lid, be arranged on the loop connecting groove on sample introduction lid connecting end surface and be arranged on the sample introduction gas outlet that sample introduction covers and form, described sample cavity covers connecting end surface by sample introduction and is communicated with the ring-type link slot with the gap between membrane module, and described loop connecting groove is communicated with the sample introduction gas outlet.
7. according to claim 1 or 6 described asymmetric ion mobility spectrometry film filters, is characterized in that, described sample introduction covers at the injection port place of sample introduction circulation canal and is provided with heater.
8. asymmetric ion mobility spectrometry film filter according to claim 7, is characterized in that, described heater is comprised of heater strip and heating wire cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203330574U CN203288556U (en) | 2013-06-09 | 2013-06-09 | Membrane filtration device for asymmetric ion mobility spectrum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203330574U CN203288556U (en) | 2013-06-09 | 2013-06-09 | Membrane filtration device for asymmetric ion mobility spectrum |
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| CN203288556U true CN203288556U (en) | 2013-11-13 |
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| CN2013203330574U Expired - Fee Related CN203288556U (en) | 2013-06-09 | 2013-06-09 | Membrane filtration device for asymmetric ion mobility spectrum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698173A (en) * | 2013-12-10 | 2014-04-02 | 大连金瑞威达科技有限公司 | Membrane separation sampling device for ion mobility spectrometry |
| CN105203357A (en) * | 2014-06-18 | 2015-12-30 | 中国科学院大连化学物理研究所 | Online membrane sample-entering device for ion mobility spectrometry |
| CN111678967A (en) * | 2020-05-07 | 2020-09-18 | 公安部第三研究所 | Ion mobility spectrometry micro-permeation device |
-
2013
- 2013-06-09 CN CN2013203330574U patent/CN203288556U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698173A (en) * | 2013-12-10 | 2014-04-02 | 大连金瑞威达科技有限公司 | Membrane separation sampling device for ion mobility spectrometry |
| CN105203357A (en) * | 2014-06-18 | 2015-12-30 | 中国科学院大连化学物理研究所 | Online membrane sample-entering device for ion mobility spectrometry |
| CN111678967A (en) * | 2020-05-07 | 2020-09-18 | 公安部第三研究所 | Ion mobility spectrometry micro-permeation device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20170609 |