CN202423215U - Gas film sampling device of ion mobility spectrometry - Google Patents
Gas film sampling device of ion mobility spectrometry Download PDFInfo
- Publication number
- CN202423215U CN202423215U CN2011205307569U CN201120530756U CN202423215U CN 202423215 U CN202423215 U CN 202423215U CN 2011205307569 U CN2011205307569 U CN 2011205307569U CN 201120530756 U CN201120530756 U CN 201120530756U CN 202423215 U CN202423215 U CN 202423215U
- Authority
- CN
- China
- Prior art keywords
- film
- sampling device
- chamber
- ion
- sample
- 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.)
- Expired - Lifetime
Links
Abstract
The utility model discloses a gas film sampling device of an ion mobility spectrometry. The gas film sampling device comprises an ionization source, a film external cavity, a film internal cavity, a semi-permeable film, a repulsion pole, an ion neutralization disk, a sucking pump and a three-way valve. The utility model adopts the technical scheme that a negative pressure forming device is arranged in the film internal cavity; the ionization source is arranged in the film external cavity; electric fields are formed on two sides of a film; and a sample can permeate through the semi-permeable film in an ion form. Under the action of concentration difference, pressure difference and the electric fields, the sample permeates through the semi-permeable film in molecule and ion forms, and the permeation rate and permeation speed of the sample in the film sampling device are improved.
Description
Technical field
The present invention relates to a kind of gas film sampling device of ion mobility spectrometry, this device can make the form of sample with molecule and ion, under concentration difference, pressure reduction, effect of electric field, sees through pellicle, has improved transmitance and the penetration speed of sample in the film sampling device.
Background technology
Ion mobility spectrometry (Ion Mobility Spectrometry; IMS) a kind of separation detection technology that occurs the technological seventies in 20th century; Compare with conventional arts such as mass spectrum, chromatograms, it has characteristics such as simple in structure, highly sensitive, that analysis speed is fast, is suitable for on-the-spot the use.Ionic migration spectrometer mainly is made up of ion source, ion gate, migration area and detector.Ion source makes sample molecule, N
2, O
2With steam ionization, the ion of generation is easy to and molecule generation ion molecule reaction, obtains multiple product ion.Ion gets into the migration area through the ion gate of periodically opening under the ordering about of electric field; Floating the gas molecule with the neutrality of adverse current constantly collides; Because these ions have different migration rates in electric field, make that different ions obtains separating, successively arrive detector.
The film sampling device is that ion mobility spectrometry provides a kind of direct, continuous input mode, has advanced ion mobility spectrometry in continuous on-line monitoring Application for Field.Simultaneously, because the existence of pellicle can prevent effectively that particle and steam from getting into ion mobility spectrometry, reached and partly eliminated effects of jamming.Yet the condition of work of ion mobility spectrometry is an atmospheric pressure, and the air pressure of film both sides is basic identical in therefore traditional gas film sampling device, and sample only depends on the effect of concentration difference to see through pellicle, has the shortcoming that transmitance is low, penetration speed is slow.
Thus, the present invention has designed a kind of novel gas film sampling device, and sample can see through pellicle with the form of molecule and ion under concentration difference, pressure reduction and effect of electric field, to improve transmitance and the penetration speed of sample in the film sampling device.
Summary of the invention
The object of the present invention is to provide a kind of gas film sampling device of ion mobility spectrometry.
A kind of gas film sampling device of ion mobility spectrometry; The left and right sides is respectively equipped with the tabular metal electrode in the airtight casing that comprises ionization source, hollow, casing, is provided with a pellicle at the middle part of casing; Pellicle with the cavity in the casing be separated into not connected about two cavitys; The right side is that chamber, the film outside, left side are the inboard chamber of film, and the metal electrode that is positioned at chamber, the film outside is a repeller electrode, and the metal electrode that is arranged in the inboard chamber of film is ion and dish.
The film outside is provided with ionization source in the chamber, and the sidewall in the chamber, the film outside is provided with sample air intake and sample gas outlet, and the sidewall in the inboard chamber of film is provided with takes out negative pressure mouth, carrier gas inlet and carrier gas outlet; Take out the negative pressure mouth and link to each other another interface emptying of first triple valve with aspiration pump through first triple valve.
The carrier gas outlet of gas film sampling device links to each other with the sample gas inlet of ion mobility spectrometry through the 3rd triple valve; Carrier gas inlet links to each other with the carrier gas source of the gas through second triple valve, and interface of another interface of second triple valve and the 3rd triple valve links to each other.
Connect extraneous direct voltage with dish through lead in repeller electrode and the ion.
Ionization source is light ionization source and radioactive ionization gauge source; Pellicle is a silicone rubber membrane.
The inboard chamber of film is provided with the formation means for applying negative; Forming means for applying negative is aspiration pump and triple valve.
Before the sampling,, make the inboard chamber of film form certain negative pressure through the effect of triple valve and aspiration pump.
In the sampling process,, improved the transmitance and the penetration speed of sample because the inside and outside pressure differential of film has promoted the diffusion of sample molecule in film.
Chamber, the film outside is provided with ionization source, and the inboard chamber of film is provided with in the ion and dish, and the film both sides are provided with electric field.Sample molecule in the chamber, the film outside is become ion by partial ionization, and sample sees through pellicle with the form of ion under the driving of electric field, impinges upon in the ion with on the dish and changes molecule again into, thereby improve the transmitance of sample.
Sample in the chamber, the film outside sees through pellicle with the form of molecule and ion under concentration difference, pressure reduction, effect of electric field.
Advantage of the present invention:
Before the sampling, form certain negative pressure in the inboard chamber of film in advance; In the sampling process, the draught head in the outside has promoted the diffusion of sample molecule in film in the film, has improved the transmitance and the penetration speed of sample.
Chamber, the film outside is provided with ionization source, and the inboard chamber of film is provided with in the ion and dish, and the film both sides are provided with electric field, and sample can see through pellicle with the form of ion, improves the transmitance of sample.
Description of drawings
Fig. 1 is applied to the structural representation of ion mobility spectrometry for the present invention.
Embodiment
In order to improve transmitance and the penetration speed of sample in the film sampling device, the invention provides a kind of gas film sampling device of novel ion mobility spectrometry.
As shown in Figure 1, the present invention is applied to ion mobility spectrometry, and wherein 1 is chamber, the film outside, and 2 is the inboard chamber of film, and 3 is pellicle; 4 is in the ion and dish, and 5 is repeller electrode, and 6 is ionization source, and 7,8,9 is first, second, third triple valve, and 10 is aspiration pump; 11 is ion mobility spectrometry, and 12 is carrier gas inlet, and 13 for floating the gas inlet, and 14 is the gas outlet of ion mobility spectrometry; 15 is the sample air intake, and 16 is the sample gas outlet, and 17 is the atmosphere air intake, and 18 is the aspiration pump gas outlet.Wherein the common terminal of first triple valve links to each other with aspiration pump, and the common terminal of second triple valve links to each other with carrier gas inlet, and the common terminal of the 3rd triple valve links to each other with ion mobility spectrometry.
A kind of gas film sampling device of ion mobility spectrometry; The left and right sides is respectively equipped with the tabular metal electrode in the airtight casing that comprises ionization source, hollow, casing, is provided with a pellicle at the middle part of casing; Pellicle with the cavity in the casing be separated into not connected about two cavitys; The right side is that chamber, the film outside, left side are the inboard chamber of film, and the metal electrode that is positioned at chamber, the film outside is a repeller electrode, and the metal electrode that is arranged in the inboard chamber of film is ion and dish;
The film outside is provided with ionization source in the chamber, and the sidewall in the chamber, the film outside is provided with sample air intake and sample gas outlet, and the sidewall in the inboard chamber of film is provided with takes out negative pressure mouth, carrier gas inlet and carrier gas outlet; Take out the negative pressure mouth and link to each other another interface emptying of first triple valve with aspiration pump through first triple valve.
The carrier gas outlet of gas film sampling device links to each other with the sample gas inlet of ion mobility spectrometry through the 3rd triple valve; Carrier gas inlet links to each other with the carrier gas source of the gas through second triple valve, and interface of another interface of second triple valve and the 3rd triple valve links to each other.
Before the sampling, second, third triple valve is connected, and two ends, the inboard chamber of film are in sealing state; Aspiration pump links to each other through the inboard chamber of first triple valve and film, and a period of time caudacoria of bleeding forms certain negative pressure in the inboard chamber; Switch first triple valve aspiration pump is linked to each other with the atmosphere air intake, the inboard chamber of film is in complete sealing state, and the negative pressure of formation is maintained.
Chamber, the film outside is provided with ionization source and repeller electrode, and the inboard chamber of film is provided with in the ion and dish, is added with voltage difference in repeller electrode and the ion with on the dish, forms certain electric field in the both sides of film.In the sampling process, sample flow is through chamber, the film outside, and under the effect of concentration difference and pressure reduction, the quantity of sample molecule sees through pellicle and is stored in the inboard chamber of film; By ionization, the sample ions of formation sees through pellicle to sample segment in the chamber, the film outside under the driving of electric field force, be transformed into molecule again in the knock-on ion with behind the dish in the effect of ionization source simultaneously.
Sampling is switched second, third triple valve after finishing, and two ends, the inboard chamber of film are in opening; The carrier gas inboard chamber of film of flowing through is brought sample into and is carried out analyzing and testing in the ion mobility spectrometry; The analytic process of transference tube is: sample is ionized to product ion after getting into ionized region; The ion gate of opening through the cycle gets into the migration area that is made up of uniform electric field; Because different ions there are differences at aspects such as structure, quality, electric charges, so they have different mobilities, cause its speed that in the migration area, moves different; Successively reach detector, thereby realize separating and detect.
Claims (4)
1. the gas film sampling device of an ion mobility spectrometry is characterized in that: comprise the airtight casing of ionization source, hollow, the left and right sides is respectively equipped with the tabular metal electrode in the casing; Be provided with a pellicle at the middle part of casing; Pellicle with the cavity in the casing be separated into not connected about two cavitys, the right side is that chamber, the film outside, left side are the inboard chamber of film, the metal electrode that is positioned at chamber, the film outside is a repeller electrode; The metal electrode that is arranged in the inboard chamber of film is ion and dish; The film outside is provided with ionization source in the chamber, and the sidewall in the chamber, the film outside is provided with sample air intake and sample gas outlet, and the sidewall in the inboard chamber of film is provided with takes out negative pressure mouth, carrier gas inlet and carrier gas outlet; Take out the negative pressure mouth and link to each other another interface emptying of first triple valve with aspiration pump through first triple valve.
2. gas film sampling device according to claim 1 is characterized in that: the carrier gas outlet of gas film sampling device links to each other with the sample gas inlet of ion mobility spectrometry through the 3rd triple valve; Carrier gas inlet links to each other with the carrier gas source of the gas through second triple valve, and interface of another interface of second triple valve and the 3rd triple valve links to each other.
3. gas film sampling device according to claim 1 is characterized in that: connect extraneous direct voltage with dish through lead in repeller electrode and the ion.
4. gas film sampling device according to claim 1 is characterized in that: ionization source is light ionization source or radioactive ionization gauge source; Pellicle is a silicone rubber membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205307569U CN202423215U (en) | 2011-12-16 | 2011-12-16 | Gas film sampling device of ion mobility spectrometry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205307569U CN202423215U (en) | 2011-12-16 | 2011-12-16 | Gas film sampling device of ion mobility spectrometry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202423215U true CN202423215U (en) | 2012-09-05 |
Family
ID=46747950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205307569U Expired - Lifetime CN202423215U (en) | 2011-12-16 | 2011-12-16 | Gas film sampling device of ion mobility spectrometry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202423215U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165387A (en) * | 2011-12-16 | 2013-06-19 | 中国科学院大连化学物理研究所 | Gaseous film sample introduction device of ion mobility spectrometry |
| CN103854950A (en) * | 2012-11-30 | 2014-06-11 | 中国科学院大连化学物理研究所 | Membrane sample injection ionic migration spectrum gas path |
| CN103854951A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High-field asymmetric waveform ion mobility spectrometer with film purging sample introduction function |
| CN103871823A (en) * | 2012-12-12 | 2014-06-18 | 中国科学院大连化学物理研究所 | Membrane-inlet ion mobility spectrometer doped with organic solvent |
| CN103887143A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer based on ion sweep type membrane sample introduction |
| CN105448639A (en) * | 2014-09-01 | 2016-03-30 | 中国科学院大连化学物理研究所 | Differential ion mobility spectrometry sample injection gas path and control method thereof |
-
2011
- 2011-12-16 CN CN2011205307569U patent/CN202423215U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165387A (en) * | 2011-12-16 | 2013-06-19 | 中国科学院大连化学物理研究所 | Gaseous film sample introduction device of ion mobility spectrometry |
| CN103854950A (en) * | 2012-11-30 | 2014-06-11 | 中国科学院大连化学物理研究所 | Membrane sample injection ionic migration spectrum gas path |
| CN103854951A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院大连化学物理研究所 | High-field asymmetric waveform ion mobility spectrometer with film purging sample introduction function |
| CN103871823A (en) * | 2012-12-12 | 2014-06-18 | 中国科学院大连化学物理研究所 | Membrane-inlet ion mobility spectrometer doped with organic solvent |
| CN103887143A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer based on ion sweep type membrane sample introduction |
| CN105448639A (en) * | 2014-09-01 | 2016-03-30 | 中国科学院大连化学物理研究所 | Differential ion mobility spectrometry sample injection gas path and control method thereof |
| CN105448639B (en) * | 2014-09-01 | 2017-06-09 | 中国科学院大连化学物理研究所 | A kind of type ion mobility spectrometry sample introduction gas circuit and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202423215U (en) | Gas film sampling device of ion mobility spectrometry | |
| CN105632870A (en) | Atmospheric pressure chemical ionization source for mass spectrum | |
| CN106525523A (en) | Thermo-analysis sampler for ion mobility spectrometer | |
| JP2010513896A (en) | Detection device | |
| CN207441655U (en) | A kind of ion mobility spectrometry and mass spectrum while sample introduction and ionization device | |
| CN101113968A (en) | Method for on-line measuring drug-making chemicals with ion transfer spectrometer | |
| CN105699478A (en) | Method for quickly identifying sugar | |
| CN102709147A (en) | Electrospray ion source and mass spectrometer | |
| CN108461377A (en) | A kind of film sample introduction Proton transfer reaction mass spectrometry | |
| CN103871823A (en) | Membrane-inlet ion mobility spectrometer doped with organic solvent | |
| CN201903529U (en) | Continuous online ionic migration spectrum monitoring instrument for poisonous gases | |
| CN103295871A (en) | Ion mobility spectrometry detection system | |
| CN107219294A (en) | It is a kind of to improve ionic migration spectrometer resolution ratio and the method for sensitivity | |
| CN103165387A (en) | Gaseous film sample introduction device of ion mobility spectrometry | |
| CN105719935A (en) | Ion migration tube adopting electro-spray ion source and application | |
| JP2016530517A5 (en) | ||
| WO2012125723A3 (en) | Microfluidic nitric oxide sensor | |
| CN105319284B (en) | A kind of method for combined use of gas-chromatography and ion mobility spectrometry | |
| CN105548327A (en) | Rapid detection for improving sensitivity of ion mobility spectrometry | |
| CN106783508B (en) | The method of transference tube and operation transference tube | |
| CN109887829A (en) | A kind of ionization source device detected simultaneously based on VUV lamp negative ions | |
| CN104716013A (en) | Novel high-field asymmetric ion mobility spectrometry device | |
| CN103776893B (en) | A kind of dielectric barrier discharge ionization source ionic migration spectrometer | |
| CN203192749U (en) | Sample introduction device of ion mobility spectrometry detection system | |
| CN209356444U (en) | A kind of ionic migration spectrometer of real time on-line monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |