CN109308990A - Sampling system for ionic migration spectrum detector - Google Patents
Sampling system for ionic migration spectrum detector Download PDFInfo
- Publication number
- CN109308990A CN109308990A CN201811119514.3A CN201811119514A CN109308990A CN 109308990 A CN109308990 A CN 109308990A CN 201811119514 A CN201811119514 A CN 201811119514A CN 109308990 A CN109308990 A CN 109308990A
- Authority
- CN
- China
- Prior art keywords
- sample introduction
- shell
- sampling system
- sampling
- ionic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0404—Capillaries used for transferring samples or ions
-
- 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
Abstract
The present invention relates to a kind of sampling system for ionic migration spectrum detector, the sampling system includes sample introduction shell, and the sample introduction shell is provided with the sample introduction capillary for connecting the sampling system and ionic tube.Using the sampling system for ionic migration spectrum detector of the invention, wherein ionic tube negative pressuren zone, sample gasification zone and outside atmosphere, corresponding pressure value P2、P1And P0, the relationship of three is P2< P1< P0, achieve the purpose that sample introduction with this pressure dependence set up to realize gas flow；Sample introduction capillary is the channel of sample feeding.By the size and P that control capillary2With P1Difference, effectively to control the sample introduction speed of sample and the disturbance of sample introduction air-flow and ionic tube interior air-flow.
Description
Technical field
The present invention relates to Ion mobility spectrometry fields, in particular to sampling system technical field, in particular to a kind of use
In the sampling system of ionic migration spectrum detector.
Background technique
Ion moving system is the core component of ionic migration spectrum detector device, system mainly contain sample introduction, ionization, from
Son migration and ion collect several functional blocks, and sampling system is in the front end of entire detection process, its main task be by
Sample gasifies and is sent into ionized region, and there are two aspects for core capabilities: sample gasification rate and sample introduction efficiency, is to be directed to adopt here
The sample of collection is solid or liquid, and gasification rate is fast, and the instantaneous concentration of sample is higher, easier to be detected；Another party
Face sample introduction efficiency is higher, detects that the probability of sample is also bigger.
Current sampling system is in terms of realizing sample gasification, substantially all by the way of heating, and in the sample that will gasify
Product, which are sent into ionized region, various methods, there is the technology using semipermeable membrane, has the whirlwind sample introduction etc. generated using fan, partly
The input mode advantage of permeable membrane infiltration is can to completely cut off extraneous water and other impurities, realizes selectable sample introduction, the disadvantage is that into
Sample low efficiency, another whirlwind sample introduction realized with fan, advantage be it is high-efficient, sample volume is big, but a disadvantage is that sample introduction air-flow
It is larger with the flow perturbation in migration tube, influence ion motion.
The above sampling system there are aiming at the problem that, the present invention, which provides, a kind of realizes sample introduction using negative pressure and capillary
Sampling system.
Summary of the invention
The purpose of the present invention is overcoming the above-mentioned prior art, a kind of achievable solid and fluid sample are provided
Sampling, sample introduction, can be effectively controlled sample introduction, the disturbance of migration air-flow for Ion transfer in control sample introduction air-flow and ionic tube
Compose the sampling system of survey meter.
To achieve the goals above, the present invention provides a kind of sampling system for ionic migration spectrum detector, have
It is following to constitute:
The sampling system includes sample introduction shell, and the sample introduction shell is provided with for connecting the sampling system
With the sample introduction capillary of ionic tube.
Preferably, the air pressure of the closed cavity of the sample introduction interior of shell is less than sampling system external pressure, and institute
The air pressure of the closing shell for the sample introduction interior of shell stated is greater than the air pressure of the negative pressuren zone of the ionic tube.
Preferably, the sample introduction shell is provided with for making outside air several filterings that internally closed cavity circulates
Device.
Preferably, one end of the capillary towards the sample introduction interior of shell closed cavity gasification zone, institute
Negative pressuren zone of the other end for the capillary stated towards the ionic tube.
Preferably, the sample introduction shell is provided with sampling placement location for fixing sampling rod and for the sample that gasifies
The heater of product, the head of the sampling rod is towards in the closed cavity of the sample introduction shell.
Preferably, the capillary on the head of the sampling rod and the gasification zone of the closed cavity towards the sample introduction shell
The distance of one end of pipe is 1mm~2mm.
Preferably, the sampling rod is cylindrical swab stick；The capillary is high temperature resistant nonmetallic materials capillary.
Preferably, the sampling placement location and the sample introduction housing seal are arranged.
Preferably, the gas of the closing shell by the size and sample introduction interior of shell of the control capillary
The difference of the air pressure of the negative pressuren zone of pressure, the ionic tube, controls gas in sample introduction speed, sample introduction air-flow and the ionic tube of sample
The disturbance of stream.
Using the sampling system for ionic migration spectrum detector of the invention, wherein ionic tube negative pressuren zone, sample gasify
Area and outside atmosphere, corresponding pressure value P2、P1And P0, the relationship of three is P2< P1< P0, closed with this pressure set up
System, to realize gas flow, achievees the purpose that sample introduction；Sample introduction capillary is the channel of sample feeding.Pass through control capillary
Size and P2With P1Difference, effectively to control the sample introduction speed of sample and the disturbance of sample introduction air-flow and ionic tube interior air-flow.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the sampling system for ionic migration spectrum detector of the invention.
Appended drawing reference
1 sample introduction shell
2 sampling placement locations
3 heaters
4 sample introduction capillaries
5 ionic tubes
6 filters
7 sample gasification zones
Specific embodiment
It is further to carry out combined with specific embodiments below in order to more clearly describe technology contents of the invention
Description.
As shown in Figure 1, being a kind of sampling system for ionic migration spectrum detector provided by the invention, wherein described
Sampling system include sample introduction shell 1, the sample introduction shell 1 is provided with for connecting the sampling system and ionic tube 5
Sample introduction capillary 4.
In a kind of preferably embodiment, the air pressure of the closed cavity of the sample introduction interior of shell is less than sampling system
External pressure, and the air pressure of the closing shell of the sample introduction interior of shell is greater than the gas of the negative pressuren zone of the ionic tube
Pressure.
As shown in Figure 1, in sampling system of the invention, including three regions: ionic tube negative pressuren zone, 7 and of sample gasification zone
Outside atmosphere, corresponding pressure value P2、P1And P0, the relationship of three is P2< P1< P0, using this pressure dependence set up,
The gas flow that arrow is illustrated in Fig. 1 may be implemented, achieve the purpose that sample introduction.
In a kind of preferably embodiment, the sample introduction shell is provided with for making outside air internally closing chamber
Several filters 6 of body circulation.As shown in Figure 1, sample introduction shell surrounding is uniformly distributed several filters, this filter be may be implemented
Outside air filters out moisture, organic matter and dust particles in air to inside cavity air circulation simultaneously.
In a kind of preferably embodiment, the closed cavity of one end of the capillary towards the sample introduction shell
Gasification zone, the negative pressuren zone of the other end of the capillary towards the ionic tube.
In a kind of preferably embodiment, the sample introduction shell is provided with the sampling for fixing sampling rod and places position
Set 2 and for the sample that gasifies heater 3, the closed cavity of the head of the sampling rod towards the sample introduction shell
Interior, the sample introduction shell is provided with the capillary 4 for connecting the sampling system and ionic tube 5.
In a kind of preferably embodiment, the head of the sampling rod and the closing chamber towards the sample introduction shell
The distance of one end of the capillary of the gasification zone of body is 1mm~2mm.
In a kind of preferably embodiment, the sampling rod is cylindrical swab stick；The capillary is high temperature resistant
Nonmetallic materials capillary.
In a kind of preferably embodiment, the sampling placement location and the sample introduction housing seal are arranged.It takes
Lining bar can individually take out, and class can realize sampling by the way of contact wiping, be placed on sampling system after taking sample
Fixed position, and sampling rod and sample introduction shell keep sealing.
In a kind of preferably embodiment, in size and the sample introduction shell by controlling the capillary
The difference of air pressure, the air pressure of the negative pressuren zone of the ionic tube of the closing shell in portion, controls sample introduction speed, the sample introduction gas of sample
The disturbance of stream and ionic tube interior air-flow.
As shown in Figure 1, sampling system provided by the invention include sample introduction shell 1, filter 6, heater 3, sampling rod and
Capillary 4, forms a closed cavity, entire sampling system abutting joint to ionic tube, and sample introduction capillary is connected to sample introduction
System gasification zone and ionic tube negative pressuren zone realize sampling, the sample introduction of solid and fluid sample by sampling rod, inside sampling system
Heater, heating sampling club head sample, so that sample is gasified；By manufacture ionic tube and sample gasification chamber pressure difference come
It realizes sample introduction, while the disturbance for migrating air-flow in sample introduction air-flow and ionic tube is effectively controlled by capillary.
Using the sampling system for ionic migration spectrum detector of the invention, wherein ionic tube negative pressuren zone, sample gasify
Area and outside atmosphere, corresponding pressure value P2、P1And P0, the relationship of three is P2< P1< P0, closed with this pressure set up
System, to realize gas flow, achievees the purpose that sample introduction；Sample introduction capillary is the channel of sample feeding.Pass through control capillary
Size and P2With P1Difference, effectively to control the sample introduction speed of sample and the disturbance of sample introduction air-flow and ionic tube interior air-flow.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the invention out.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (9)
1. a kind of sampling system for ionic migration spectrum detector, which is characterized in that the sampling system includes outside sample introduction
Shell, the sample introduction shell are provided with the sample introduction capillary for connecting the sampling system and ionic tube.
2. the sampling system according to claim 1 for ionic migration spectrum detector, which is characterized in that the sample introduction
The air pressure of the closed cavity of interior of shell is less than sampling system external pressure, and the closing shell of the sample introduction interior of shell
Air pressure be greater than the ionic tube negative pressuren zone air pressure.
3. the sampling system according to claim 1 or 2 for ionic migration spectrum detector, which is characterized in that described
Sample introduction shell is provided with for making outside air several filters that internally closed cavity circulates.
4. the sampling system according to claim 1 or 2 for ionic migration spectrum detector, which is characterized in that described
One end of capillary towards the sample introduction shell closed cavity gasification zone, the other end of the capillary is described in
Ionic tube negative pressuren zone.
5. the sampling system according to claim 1 or 2 for ionic migration spectrum detector, which is characterized in that described
Sample introduction shell is provided with sampling placement location for fixing sampling rod and for the heater for the sample that gasifies, the sampling
The head of stick is towards in the closed cavity of the sample introduction interior of shell.
6. the sampling system according to claim 5 for ionic migration spectrum detector, which is characterized in that the sampling
The head of stick is 1mm~2mm at a distance from one end of the capillary of the gasification zone of the closed cavity towards the sample introduction shell.
7. the sampling system according to claim 5 for ionic migration spectrum detector, which is characterized in that the sampling
Stick is cylindrical swab stick；The capillary is high temperature resistant nonmetallic materials capillary.
8. the sampling system according to claim 5 for ionic migration spectrum detector, which is characterized in that the sampling
Placement location and the sample introduction housing seal are arranged.
9. the sampling system according to claim 1 or 2 for ionic migration spectrum detector, which is characterized in that pass through control
The air pressure of closing shell and bearing for the ionic tube of the size and the sample introduction interior of shell of the system capillary
The difference of the air pressure of pressure area controls the disturbance of the sample introduction speed of sample, sample introduction air-flow and ionic tube interior air-flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119514.3A CN109308990A (en) | 2018-09-25 | 2018-09-25 | Sampling system for ionic migration spectrum detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119514.3A CN109308990A (en) | 2018-09-25 | 2018-09-25 | Sampling system for ionic migration spectrum detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109308990A true CN109308990A (en) | 2019-02-05 |
Family
ID=65224681
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811119514.3A Pending CN109308990A (en) | 2018-09-25 | 2018-09-25 | Sampling system for ionic migration spectrum detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3767270A1 (en) * | 2019-07-16 | 2021-01-20 | Hamilton Sundstrand Corporation | Thermal desorbers |
| CN112858455A (en) * | 2019-11-26 | 2021-05-28 | 中国科学院大连化学物理研究所 | High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294933A (en) * | 2007-04-24 | 2008-10-29 | 中国科学院大连化学物理研究所 | Surface gas flow purging thermal desorption sampling device |
| CN103165388A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for mass flow air enrichment analysis mass spectrum sampling in confined space |
| CN104713941A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Complete organic and inorganic explosive analyser |
-
2018
- 2018-09-25 CN CN201811119514.3A patent/CN109308990A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294933A (en) * | 2007-04-24 | 2008-10-29 | 中国科学院大连化学物理研究所 | Surface gas flow purging thermal desorption sampling device |
| CN103165388A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for mass flow air enrichment analysis mass spectrum sampling in confined space |
| CN104713941A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Complete organic and inorganic explosive analyser |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3767270A1 (en) * | 2019-07-16 | 2021-01-20 | Hamilton Sundstrand Corporation | Thermal desorbers |
| US11415495B2 (en) | 2019-07-16 | 2022-08-16 | Hamilton Sundstrand Corporation | Thermal desorbers |
| US11609164B2 (en) | 2019-07-16 | 2023-03-21 | Hamilton Sundstrand Corporation | Thermal desorbers |
| CN112858455A (en) * | 2019-11-26 | 2021-05-28 | 中国科学院大连化学物理研究所 | High-flux particulate matter collecting and sampling device and method for ion mobility spectrometry |
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Application publication date: 20190205 |