CN112858455A - High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry - Google Patents
High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry Download PDFInfo
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- 238000005070 sampling Methods 0.000 title claims abstract description 114
- 238000001871 ion mobility spectroscopy Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000013618 particulate matter Substances 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002309 gasification Methods 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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- General Health & Medical Sciences (AREA)
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Abstract
The invention provides a high-flux particulate matter collecting and sampling device for ion mobility spectrometry. The invention comprises the following steps: sampling device, sampling device is including sampling chamber and the micropore net of setting in sampling chamber, still including connecting sample collection system and the sample sampling system on sampling chamber, sampling chamber top is equipped with heating mechanism, the aperture of micropore net is less than the diameter of original sample, sample collection system is used for inhaling the sample to sampling chamber when the gas flow is in the first state, sample sampling system is used for carrying the sample after the heating to other mechanisms when the gas flow is in the second state. According to the invention, through continuous sample collection and sample introduction processes, a large number of samples can be collected to the ion mobility spectrometry, and through high-temperature analysis of the heating mechanism, the concentration of the gas sample is higher, which is beneficial to improving the detection sensitivity of the ion mobility spectrometry, and meanwhile, the solid-state sample collection process is simplified, and the method is simple and practical.
Description
Technical Field
The invention relates to the technical field of ion migration, in particular to a high-flux particulate matter collecting and sampling device and method for ion mobility spectrometry.
Background
The collecting and sampling device is one of important components in an ion mobility spectrometry instrument, and directly influences the performance of the ion mobility spectrometry.
Most of the sample injection devices used in the current ion mobility spectrometry devices adopt a wiping sampling method, wherein particles on the surface of an article are wiped and collected through wiping paper, and then the article is put into the sample injection device for analysis, as disclosed in patent CN 101427140A. The method has the advantages of complex operation flow, low surface collection efficiency due to the need of using wiping paper for collection, no reuse of the wiping paper after use and high use cost. Another type of ion mobility spectrometry apparatus uses a small gas flow to collect a sample of particles, which is directly drawn into an ion mobility spectrometer for analysis, for example US 20090032695. Before entering, a sample is not subjected to high-temperature analysis, most of the sample is adsorbed in a sample injection pipeline, so that the detection sensitivity of the ion mobility spectrometry is directly reduced, and the toxic effect of the ion mobility spectrometry is caused.
Disclosure of Invention
According to the technical problems, a high-flux particulate matter collecting and sampling device and method for ion mobility spectrometry are provided. The technical means adopted by the invention are as follows:
a kind of sampling device is gathered to high flux particulate matter for ion mobility spectrometry, including: sampling device, sampling device is including sampling chamber and the micropore net of setting in sampling chamber, still including connecting sample collection system and the sample sampling system on sampling chamber, sampling chamber top is equipped with heating mechanism, the aperture of micropore net is less than the diameter of original sample, sample collection system is used for inhaling the sample to sampling chamber when the gas flow is in the first state, sample sampling system is used for carrying the sample after the heating to other mechanisms when the gas flow is in the second state.
Furthermore, the sample collection system comprises a sampling head connected to one side of the sampling cavity, a first electromagnetic valve, a second electromagnetic valve and a turbofan connected to the other side of the sampling cavity, the sampling head, the first electromagnetic valve and the sampling cavity are connected through an air inlet pipe, the sampling cavity is connected with the second electromagnetic valve and the turbofan through an air outlet pipe, and the air inlet pipe and the air outlet pipe are respectively arranged on different sides of the microporous net;
the sample sampling system comprises an air sampling pump, a purification mechanism and an ion mobility spectrometry, wherein the air sampling pump and the purification mechanism are connected to one side of a sampling cavity, the ion mobility spectrometry is connected to the other side of the sampling cavity, the air sampling pump, the purification mechanism and the sampling cavity are connected through a cleaning pipe, the sampling cavity and the ion mobility spectrometry are connected through a discharge pipe, the cleaning pipe and the air inlet pipe are arranged on the same side, and the discharge pipe and the air outlet pipe are arranged on the same side.
Further, the heating means comprises an infrared halogen lamp having a heating rate of at least 50 ℃/s, which is disposed on the upper portion of the fine mesh and irradiates perpendicularly to the end surface of the fine mesh.
Further, the first electromagnetic valve and the second electromagnetic valve are both two-position two-way electromagnetic valves.
Furthermore, the air inlet pipe and the air outlet pipe are both corrugated pipes with the thickness of 15mm-30 mm.
Furthermore, the cleaning pipe and the discharging pipe are both tetrafluoro pipes with the diameter of 2mm-4 mm.
The invention also provides a sampling method using the high-flux particulate matter sampling device, which comprises the following steps:
a sample collection stage: s1, the air sampling pump is in a closed state, the first electromagnetic valve and the second electromagnetic valve are in a first state position, at the moment, the air inlet pipe, the sampling cavity and the air outlet pipe are in a communicated state, and the turbo fan starts to suck air;
s2, stopping air suction of the turbo fan, and enabling the first electromagnetic valve and the second electromagnetic valve to be in a second state position, wherein at the moment, two sides of the sampling cavity are in a closed state;
s3, starting a heating mechanism to instantaneously gasify the original sample;
sample introduction stage: and S4, after the gasification is finished, closing the heating mechanism, starting the air sampling pump, purifying the air conveyed by the air sampling pump from the outside through the purifying mechanism, and blowing the gasified sample to the ion mobility spectrometry.
According to the invention, through continuous sample collection and sample introduction processes, a large number of samples can be collected to the ion mobility spectrometry, and through high-temperature analysis of the heating mechanism, the concentration of the gas sample is higher, which is beneficial to improving the detection sensitivity of the ion mobility spectrometry, and meanwhile, the solid-state sample collection process is simplified, and the method is simple and practical.
For the above reasons, the present invention can be widely applied to the technical field of ion mobility.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1. a sampling head; 2. a first solenoid valve; 3. a collection device; 4. a microporous web; 5. a second solenoid valve; 6. a turbo fan; 7. an air sampling pump; 8. a purification mechanism; 9. ion mobility spectrometry.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the embodiment of the present invention discloses a high throughput particle collection and sample injection device for ion mobility spectrometry 9, comprising: the sampling device 3 comprises a sampling cavity and a microporous net 4 arranged in the sampling cavity, and further comprises a sample collecting system and a sample feeding system which are connected to the sampling cavity, wherein a heating mechanism is arranged at the top end of the sampling cavity, the sample applied in the embodiment comprises black powder, chemical fertilizer powder, TNT powder and flammable and explosive organic particles, and the diameter of the sample is larger than 5-10 micrometers. The pore diameter of the microporous net 4 is smaller than the diameter of the original sample, and in the embodiment, the pore diameter is less than or equal to 5 micrometers and less than or equal to 10 micrometers. The sample collection system is used for sucking a sample into the sampling cavity when the gas circulation is in a first state, and the sample introduction system is used for conveying the heated sample to other mechanisms when the gas circulation is in a second state.
The sample collection system comprises a sampling head 1 connected to one side of a sampling cavity, a first electromagnetic valve 2, a second electromagnetic valve 5 connected to the other side of the sampling cavity and a turbofan 6, wherein the sampling head 1, the first electromagnetic valve 2 and the sampling cavity are connected through an air inlet pipe, the sampling cavity is connected with the second electromagnetic valve 5 and the turbofan 6 through an air outlet pipe, the air inlet pipe and the air outlet pipe are respectively arranged on different sides of a microporous net 4, the first electromagnetic valve 2 and the second electromagnetic valve 5 are both two-position two-way electromagnetic valves, the first state position is an open position of the first electromagnetic valve and the second electromagnetic valve 5 is an closed position, in the embodiment, the microporous net 4 divides the sampling cavity into a left cavity and a right cavity, and in other embodiments, the sampling cavity can be divided into other types of cavities;
sample sampling system is including connecting at air sampling pump 7, purification mechanism 8 of sampling chamber one side and connecting at the ion mobility spectrometry 9 of sampling chamber opposite side, air sampling pump 7, purification mechanism link to each other through advancing the scavenge pipe between the chamber with sampling, it links to each other through the discharging pipe between chamber and the ion mobility spectrometry 9 of sampling, advance scavenge pipe and intake pipe homonymy, discharging pipe and outlet duct homonymy, in this embodiment, purification mechanism includes molecular sieve, active carbon and dewatering silica gel, and it is arranged in detaching the H in the air2And o and dust removal.
The air inlet pipe and the air outlet pipe are both corrugated pipes of 15mm-30mm, and the air inlet cleaning pipe and the air outlet pipe are both tetrafluoro pipes of 2mm-4 mm.
As a preferred embodiment, the heating means comprises an infrared halogen lamp, which is heated at a rate of at least 50 ℃/s up to 300 ℃, is placed on the upper part of the fine mesh 4, and is irradiated perpendicularly to the end face of the fine mesh 4.
The embodiment of the invention also discloses a sampling method, which comprises the following steps:
a sample collection stage: s1, the air sampling pump 7 is in a closed state, the first electromagnetic valve 2 and the second electromagnetic valve 5 are in a first state position, at the moment, the air inlet pipe, the sampling cavity and the air outlet pipe are in a communicated state, the turbofan 6 starts to suck air, samples are collected from the external environment through the sampling head 1 and enter a sampling pipeline, and the airflow speed of the turbofan 6 is 5-10 m/S;
s2, enabling the sample to enter a sampling cavity and be adsorbed on the microporous net 4, stopping air suction of the turbo fan 6, and enabling the first electromagnetic valve 2 and the second electromagnetic valve 5 to be in a second state position, wherein at the moment, two sides of the sampling cavity are in a closed state;
s3, starting a heating mechanism to instantaneously gasify the original sample;
sample introduction stage: s4, after the gasification is completed, the heating mechanism is turned off, the air sampling pump 7 is turned on, the air conveyed from the outside through the air sampling pump 7 is purified by the purifying mechanism, and the gasified sample is carried into the ion mobility spectrometry 9 by the carrier gas for analysis, for example, in this embodiment, an infrared halogen lamp with a rate of 50 ℃/S is selected for heating, and the temperature is heated to 300 ℃ for 6S. I.e. 6s later, the air sampling pump 7 is turned off, i.e. the gasification is completed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a sampling device is gathered to high flux particulate matter for ion mobility spectrometry which characterized in that includes: sampling device, sampling device is including sampling chamber and the micropore net of setting in sampling chamber, still including connecting sample collection system and the sample sampling system on sampling chamber, sampling chamber top is equipped with heating mechanism, the aperture of micropore net is less than the diameter of original sample, sample collection system is used for inhaling the sample to sampling chamber when the gas flow is in the first state, sample sampling system is used for carrying the sample after the heating to other mechanisms when the gas flow is in the second state.
2. The high-flux particulate matter collecting and sampling device for ion mobility spectrometry according to claim 1, wherein the sample collecting system comprises a sampling head connected to one side of the sampling cavity, a first electromagnetic valve, and a second electromagnetic valve and a turbo fan connected to the other side of the sampling cavity, the sampling head, the first electromagnetic valve and the sampling cavity are connected through an air inlet pipe, the sampling cavity is connected with the second electromagnetic valve and the turbo fan through an air outlet pipe, and the air inlet pipe and the air outlet pipe are respectively arranged on the opposite sides of the microporous net;
the sample sampling system comprises an air sampling pump, a purification mechanism and an ion mobility spectrometry, wherein the air sampling pump and the purification mechanism are connected to one side of a sampling cavity, the ion mobility spectrometry is connected to the other side of the sampling cavity, the air sampling pump, the purification mechanism and the sampling cavity are connected through a cleaning pipe, the sampling cavity and the ion mobility spectrometry are connected through a discharge pipe, the cleaning pipe and the air inlet pipe are arranged on the same side, and the discharge pipe and the air outlet pipe are arranged on the same side.
3. The high throughput particle collection and sampling device for ion mobility spectrometry of claim 1, wherein the heating mechanism comprises an infrared halogen lamp with a heating rate of at least 50 ℃/s, which is disposed on the upper part of the microporous mesh and vertically irradiates the end face of the microporous mesh.
4. The high-flux particulate matter collecting and sampling device for ion mobility spectrometry according to claim 2, wherein the first solenoid valve and the second solenoid valve are both two-position two-way solenoid valves.
5. The high-flux particulate matter collecting and sampling device for ion mobility spectrometry according to claim 2, wherein the air inlet pipe and the air outlet pipe are both corrugated pipes of 15mm-30 mm.
6. The device for collecting and sampling the high-flux particulate matters for the ion mobility spectrometry according to claim 2, wherein the cleaning pipe and the discharging pipe are both 2mm-4mm tetrafluoride pipes.
7. A collection and sample injection method using the high-throughput particle collection and sample injection device as claimed in any one of claims 1 to 6, comprising the following steps:
a sample collection stage: s1, the air sampling pump is in a closed state, the first electromagnetic valve and the second electromagnetic valve are in a first state position, at the moment, the air inlet pipe, the sampling cavity and the air outlet pipe are in a communicated state, and the turbo fan starts to suck air;
s2, stopping air suction of the turbo fan, and enabling the first electromagnetic valve and the second electromagnetic valve to be in a second state position, wherein at the moment, two sides of the sampling cavity are in a closed state;
s3, starting a heating mechanism to instantaneously gasify the original sample;
sample introduction stage: and S4, after the gasification is finished, closing the heating mechanism, starting the air sampling pump, purifying the air conveyed by the air sampling pump from the outside through the purifying mechanism, and blowing the gasified sample to the ion mobility spectrometry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911177236.1A CN112858455A (en) | 2019-11-26 | 2019-11-26 | High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry |
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| CN201911177236.1A CN112858455A (en) | 2019-11-26 | 2019-11-26 | High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001521268A (en) * | 1997-10-22 | 2001-11-06 | アイディーエス・インテリジェント・ディテクション・システムズ・インコーポレーテッド | Sample-trapping ion mobility spectrometer for portable molecule detection |
| CN201130166Y (en) * | 2007-08-10 | 2008-10-08 | 上海新漫传感技术研究发展有限公司 | Multifunctional sampling apparatus for ion mobility spectrometer |
| CN103018313A (en) * | 2011-09-20 | 2013-04-03 | 中国科学院电子学研究所 | Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof |
| CN104459053A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Gas sampling device as well as gas path system and method adopting same |
| 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 |
| CN109308990A (en) * | 2018-09-25 | 2019-02-05 | 公安部第三研究所 | Sampling system for ionic migration spectrum detector |
-
2019
- 2019-11-26 CN CN201911177236.1A patent/CN112858455A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001521268A (en) * | 1997-10-22 | 2001-11-06 | アイディーエス・インテリジェント・ディテクション・システムズ・インコーポレーテッド | Sample-trapping ion mobility spectrometer for portable molecule detection |
| CN201130166Y (en) * | 2007-08-10 | 2008-10-08 | 上海新漫传感技术研究发展有限公司 | Multifunctional sampling apparatus for ion mobility spectrometer |
| CN103018313A (en) * | 2011-09-20 | 2013-04-03 | 中国科学院电子学研究所 | Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof |
| 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 |
| CN104459053A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Gas sampling device as well as gas path system and method adopting same |
| CN109308990A (en) * | 2018-09-25 | 2019-02-05 | 公安部第三研究所 | Sampling system for ionic migration spectrum detector |
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