CN106525523A - Thermo-analysis sampler for ion mobility spectrometer - Google Patents
Thermo-analysis sampler for ion mobility spectrometer Download PDFInfo
- Publication number
- CN106525523A CN106525523A CN201710000645.9A CN201710000645A CN106525523A CN 106525523 A CN106525523 A CN 106525523A CN 201710000645 A CN201710000645 A CN 201710000645A CN 106525523 A CN106525523 A CN 106525523A
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- Prior art keywords
- thermal desorption
- room
- thermo
- ptc heating
- migration spectrometer
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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
- G01N1/24—Suction devices
-
- 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
- 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
- G01N27/626—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 using heat to ionise a gas
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a thermo-analysis sampler for an ion mobility spectrometer; the thermo-analysis sampler comprises a sample inlet, a thermo-analysis chamber, and a PTC (positive temperature coefficient) heater; a gas passage with both front and rear ends communicated with the outside is arranged in the thermo-analysis chamber; the sample inlet is communicated with the front end of the thermo-analysis chamber, and the PTC heater is arranged close to the outer wall of the thermo-analysis chamber; the thermo-analysis sampler also comprises a U-shaped optoelectric switch arranged at the rear of the sample inlet and electrically connected to the PTC heater; in addition, the U-shaped optoelectric switch is electrically connected to the ion mobility spectrometer. The PTC heater is used to provide heat while a sampling portion arranged at the sample inlet is inserted into a judging mechanism, programmable program heating mode is achieved, direct heating is provided for a sample to be detected, sampling efficiency is greatly improved, and trace residue of the sample to be detected can be detected sensitively and conveniently.
Description
Technical field
The present invention relates to ion mobility spectrometry detection technique field, and in particular to a kind of Thermal desorption for ionic migration spectrometer
Sampling device, is detected to solid testing sample by the way of Thermal desorption.
Background technology
Ion mobility spectrometry detection technique as a kind of Broad Spectrum Analysis of Infinitesimal technology, with detection speed it is fast, sensitivity is high, it is little to be easy to
Type, it is low in energy consumption the advantages of, it can detect mail, parcel and the different shape such as luggage in seconds, various sizes of
Explosive and drugs in object, while can be used for detecting human body impedimenta.It is on current safety check market, main
Will be using ion mobility spectrometry detection technique detection dangerous materials (such as explosive, drugs).In ion mobility spectrometry instrument, all with one
Individual sampling device, this device can carry out gasification parsing to the solid particle of entrance or gas, and the sample molecule for gasifying afterwards exists
Ionized region is entered under the guiding of air-flow, the sample ions being ionized enter migration area, molecule is realized according to the difference of flight time
Discriminating.
Thermal desorption injector is its performance quality for the essential element in ion migration spectrometer, is directly determined
The overall performance of sample introduction efficiency and ion mobility spectrometry, existing Thermal desorption injector its heating is added by heating rod temperature control
Heat, belongs to thermostatic control pattern, and heat time heating time is different according to heating rod power, current use time scope 10-30min.Heating
It is slow, and for instrument, observable index is higher.
The content of the invention
For the deficiencies in the prior art, the present invention is intended to provide a kind of Thermal desorption injector for ionic migration spectrometer,
Thermal source is provided using PTC heating plates, is coordinated the sampling unit insertion decision mechanism set by sample introduction entrance, is realized programmable journey
Sequence heating mode, directly heats to testing sample, substantially increases sampling efficiency, the trace residue of determinand can be carried out sensitive
And easily detect.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of Thermal desorption injector for ionic migration spectrometer, including sample introduction entrance, Thermal desorption room, PTC heating plates, institute
Stating Thermal desorption chamber interior has air flue of the front-end and back-end with ft connection；The sample introduction entrance is communicated in the Thermal desorption room
Front end, the PTC heating plates are then close to the outer wall of the Thermal desorption room and are arranged；U-shaped photoswitch, the U-shaped are included also
Photoswitch is located at the rear portion of the sample introduction entrance, and is electrically connected to the PTC heating plates；In addition, making U-shaped photoswitch be electrically connected
It is connected to ionic migration spectrometer.
Sampling cloth inserts injector by sample introduction entrance after sampling, U-shaped photoswitch can be produced and be blocked, U-shaped photoelectricity
Switch exports high level after detecting, drive the PTC heating plates to start working, it is achieved thereby that programmable temperature programming mould
Formula.Due to PTC heating plates characteristic, the Thermal desorption room programming rate such as there is heating power height, voltage range width, profile can design
Hurry up, maximum temperature is up to 300 DEG C.
Further, the Thermal desorption room includes pressing from both sides under Resolution Room lower plate and Resolution Room train wheel bridge, and the Resolution Room
The outer wall of plate and Resolution Room train wheel bridge is glued with PTC heating plates described at least one respectively；Air flue in the Thermal desorption room
Rear portion is divided into upper and lower two L-type air flues.
The end of the air flue of Thermal desorption chamber interior is connected to the transference tube of ionic migration spectrometer, and sample passes through L-type section
The end of air flue is reached, transference tube is eventually entered into.Resolution Room train wheel bridge and Resolution Room lower plate surround Thermal desorption room, in solution
The outer wall of analysis room train wheel bridge and lower plate is fitted PTC heating plates, and the rear portion of air flue is divided into two L-type sections, sets respectively
The upper and lower of Thermal desorption chamber interior is placed in, then sampling cloth can have to determinand regardless of positive and negative in gatherer process
Effect collection.The structure of the Resolution Room is conducive to the gasification of sample, filters and gather.And PTC heating plates are directly fitted in into parsing
The outer wall of room train wheel bridge and lower plate, the way of contact are contacted for face, substantially increase heat transfer efficiency.
Further, the end of the Thermal desorption room is provided with polytetrafluoro ring, for sealing the carrier gas of docking transference tube
Entrance.Polytetrafluoro ring is set with the end of Thermal desorption room, the air flue end in Thermal desorption room can be caused to pass through polytetrafluoro ring pressure
The carrier gas inlet of tight transference tube so that both sealing docking, so that the testing sample of gasification is with transference tube
Carrier gas is smoothly entered inside transference tube.
Further, the air flue of the Thermal desorption chamber interior is in integrally strip.
The beneficial effects of the present invention is：
1st, the present invention is provided with U-shaped photoswitch as sampling cloth insertion decision mechanism in sample introduction entrance, when sampling cloth is inserted
When entering injector, U-shaped photoswitch is detected and is driven ionic migration spectrometer and PTC heating plates to open mode of operation, is realized
Programmable temperature programming pattern, substantially increases sampling efficiency, and effectively reduces sampler power consumption.
2nd, by arranging upper and lower L-type air duct sections, make sampling cloth in gatherer process regardless of positive and negative, determinand can be carried out
Effectively gather, the structure is conducive to the gasification of sample, filters and gather.
3rd, the indoor air-breathing pickup area of parsing has been arranged on the present invention center of sampling cloth effective coverage, and which is excellent
Point is the detectable substance that can effectively suck gasification.
4th, the present invention provides thermal source using PTC heating plates, and programming rate is fast, and Resolution Room maximum temperature is up to 300 DEG C.
5th, PTC heating plates are directly fitted in the lateral surface of Resolution Room train wheel bridge and lower plate, and the way of contact is contacted for face, greatly
Improve greatly heat transfer efficiency.
6th, the Thermal desorption room of strip crack shape is applied to the sample mode using sampling cloth, farthest reduces
The volume of Thermal desorption injector, so as to effectively reduce the volume of ion mobility spectrometry instrument.
Description of the drawings
Fig. 1 is the side cross-section schematic diagram of invention；
Fig. 2 is the three-dimensional schematic cross-section of invention；
Specific embodiment
Below with reference to accompanying drawing, the invention will be further described, it should be noted that the present embodiment is with this technology side
Premised on case, detailed embodiment and specific operating process are given, but protection scope of the present invention is not limited to this reality
Apply example.
As shown in Figure 1-2, a kind of Thermal desorption injector for ionic migration spectrometer, including sample introduction entrance 1, Thermal desorption
Room, PTC heating plates 5, be formed with the Thermal desorption room front-end and back-end with outside identical air flue；The sample introduction entrance 1
The front end of the Thermal desorption room is communicated in, the PTC heating plates 5 are then close to the outer wall of the Thermal desorption room and are arranged；The use
U-shaped photoswitch 2 is included also in the Thermal desorption injector of ionic migration spectrometer, the U-shaped photoswitch 2 is located at the sample introduction
The rear portion of entrance 1, and it is electrically connected to the PTC heating plates 5；In addition, making U-shaped photoswitch 2 be electrically connected to ionic migration spectrometer.
It should be noted that U-shaped photoswitch is arranged on sample introduction entry back, U-shaped photoswitch is normally opened.Sampling cloth is being adopted
Injector is inserted by sample introduction entrance after sample, U-shaped photoswitch can be produced and be blocked, output is high after U-shaped photoswitch is detected
Level, drives the PTC heating plates to start working, it is achieved thereby that programmable temperature programming pattern.As PTC heating plates have
The characteristic such as have heating power height, voltage range width, profile design, Thermal desorption room programming rate are fast, and maximum temperature is up to 300
℃。
Further, the Thermal desorption room is included under Resolution Room lower plate 3 and Resolution Room train wheel bridge 4, and the Resolution Room
The lateral surface of clamping plate 3 and Resolution Room train wheel bridge 4 is glued with PTC heating plates 5 described at least one；Gas in the Thermal desorption room
The rear portion in road is divided into upper and lower two L-type air flues.
The end of the air flue of Thermal desorption chamber interior is connected to the transference tube of ionic migration spectrometer, and sample passes through L-type section
The end of air flue is reached, transference tube is eventually entered into.Resolution Room train wheel bridge and Resolution Room lower plate surround Thermal desorption room, in solution
The outer wall of analysis room train wheel bridge and lower plate is fitted PTC heating plates, and the rear portion of air flue is divided into two L-type air flues, respectively
The upper and lower of Thermal desorption chamber interior is arranged at, then sampling cloth can be carried out to determinand regardless of positive and negative in gatherer process
Effectively gather.The structure of the Resolution Room is conducive to the gasification of sample, filters and gather.And PTC heating plates are directly fitted in into solution
The outer wall of analysis room train wheel bridge and lower plate, the way of contact are contacted for face, substantially increase heat transfer efficiency.Resolution Room train wheel bridge is conciliate
Analysis room lower plate is combined by the fastening of screw group.
In the present embodiment, PTC heating plates 5 are close to be fixed on Resolution Room train wheel bridge 4 by heating plate fixed plate 6 and conciliate
The lateral surface of analysis room lower plate 3.Heating plate fixed plate 6 is locked with Resolution Room train wheel bridge or lower plate by modes such as screws
Tightly.
Further, the end of the Thermal desorption room is provided with polytetrafluoro ring 7, for sealing the load of docking transference tube
Gas entrance 9, the front end of carrier gas inlet 9 are coated with semipermeable membrane 8, for filtering the impurity in gasification testing sample.In Thermal desorption room
End polytetrafluoro ring 7 is set, the air flue end in Thermal desorption room can be caused to compress transference tube by polytetrafluoro ring
Carrier gas inlet so that both sealing docking so that the testing sample of gasification with the carrier gas of transference tube smoothly enter from
Inside sub- migration tube.
Further, the air flue of the Thermal desorption chamber interior is in strip.
During work, after being acquired to determinand using sampling cloth, sampling cloth is entered by sample introduction entrance 1, and U-shaped light is established by cable
Close 2 and sampling cloth is detected into after, send high trigger signal, drive two PTC heating plates 5, and start ion migration
Testing sample is inhaled by spectrometer, the asepwirator pump of ionic migration spectrometer toward the direction of ionic migration spectrometer；Sampling cloth is in Thermal desorption room
Air flue in become testing sample steam after quick heating, the testing sample of gasification simultaneously by two L-type air flues toward from
The carrier gas inlet direction motion of sub- migration tube, so sampling two acquisition surfaces of cloth to testing sample carried out effective receipts
Collection, then converges to up to the semipermeable membrane 8 between the carrier gas inlet of the air flue and transference tube of Thermal desorption room, in front of semipermeable membrane
High-speed cruising, large-area air-flow group are formed, sample segment oozes semi-permeable membrane and enters into inside migration tube in ionic migration spectrometer
In sample is detected.
For a person skilled in the art, technical scheme that can be according to more than and design, make various corresponding
Change and deform, and all these changes and deformation is should be construed as being included within the protection domain of the claims in the present invention.
Claims (4)
1. a kind of Thermal desorption injector for ionic migration spectrometer, it is characterised in that including sample introduction entrance, Thermal desorption room, PTC
Heating plate, the Thermal desorption chamber interior have air flue of the front-end and back-end with ft connection；The sample introduction entrance is communicated in described
The front end of Thermal desorption room, the PTC heating plates are then close to the outer wall of the Thermal desorption room and are arranged；Also include U-shaped light to establish by cable
Close, the U-shaped photoswitch is located at the rear portion of the sample introduction entrance, and is electrically connected to the PTC heating plates；In addition, making U-shaped light
Electric switch is electrically connected to ionic migration spectrometer.
2. the Thermal desorption injector for ionic migration spectrometer according to claim 1, it is characterised in that the Thermal desorption
Room includes Resolution Room lower plate and Resolution Room train wheel bridge, and the outer wall of the Resolution Room lower plate and Resolution Room train wheel bridge is tight respectively
Post PTC heating plates described at least one；The rear portion of the air flue in the Thermal desorption room is divided into two L-type air flues.
3. the Thermal desorption injector for ionic migration spectrometer according to claim 1 and 2, it is characterised in that the heat
The end of Resolution Room is provided with polytetrafluoro ring, for sealing the carrier gas inlet of docking transference tube.
4. the Thermal desorption injector for ionic migration spectrometer according to claim 1, it is characterised in that the Thermal desorption
The air flue of chamber interior is in integrally strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710000645.9A CN106525523B (en) | 2017-01-03 | 2017-01-03 | Thermal analysis sample injector for ion mobility spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710000645.9A CN106525523B (en) | 2017-01-03 | 2017-01-03 | Thermal analysis sample injector for ion mobility spectrometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106525523A true CN106525523A (en) | 2017-03-22 |
| CN106525523B CN106525523B (en) | 2023-09-08 |
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ID=58336786
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710000645.9A Active CN106525523B (en) | 2017-01-03 | 2017-01-03 | Thermal analysis sample injector for ion mobility spectrometer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226267A (en) * | 2017-06-15 | 2018-06-29 | 深圳市天和时代电子设备有限公司 | A kind of split type thermal desorption sampling device |
| CN112114024A (en) * | 2019-06-19 | 2020-12-22 | 中国科学院大连化学物理研究所 | Sample injection device and method for improving ion mobility spectrometry quantitative analysis accuracy and application thereof |
| CN112924528A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Sample injector for ion mobility spectrometry flash thermal analysis |
| CN113406184A (en) * | 2020-03-16 | 2021-09-17 | 中国科学院大连化学物理研究所 | In-situ thermal desorption photoionization device for improving mass spectrum drug detection sensitivity |
| CN113834868A (en) * | 2021-09-06 | 2021-12-24 | 宁波盘福生物科技有限公司 | Device and method for rapidly detecting drugs in hair |
| CN106525523B (en) * | 2017-01-03 | 2023-09-08 | 公安部第一研究所 | Thermal analysis sample injector for ion mobility spectrometer |
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| CN1352390A (en) * | 2000-11-15 | 2002-06-05 | 中国石油化工股份有限公司 | Chromatic spectrum sample feeder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525523B (en) * | 2017-01-03 | 2023-09-08 | 公安部第一研究所 | Thermal analysis sample injector for ion mobility spectrometer |
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2017
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| EP0458622A2 (en) * | 1990-05-22 | 1991-11-27 | Barringer Technologies Inc. | Method and apparatus for collection and analysis of desquamated skin particulates or other tissue |
| CN1352390A (en) * | 2000-11-15 | 2002-06-05 | 中国石油化工股份有限公司 | Chromatic spectrum sample feeder |
| CN1467498A (en) * | 2003-05-20 | 2004-01-14 | 中国科学院安徽光学精密机械研究所 | Aerosol real-time measuring ion migration mass spectrograph |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525523B (en) * | 2017-01-03 | 2023-09-08 | 公安部第一研究所 | Thermal analysis sample injector for ion mobility spectrometer |
| CN108226267A (en) * | 2017-06-15 | 2018-06-29 | 深圳市天和时代电子设备有限公司 | A kind of split type thermal desorption sampling device |
| CN108226267B (en) * | 2017-06-15 | 2023-09-12 | 深圳市天和时代电子设备有限公司 | Split type thermal analysis sampling device |
| CN112114024A (en) * | 2019-06-19 | 2020-12-22 | 中国科学院大连化学物理研究所 | Sample injection device and method for improving ion mobility spectrometry quantitative analysis accuracy and application thereof |
| CN112924528A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Sample injector for ion mobility spectrometry flash thermal analysis |
| CN113406184A (en) * | 2020-03-16 | 2021-09-17 | 中国科学院大连化学物理研究所 | In-situ thermal desorption photoionization device for improving mass spectrum drug detection sensitivity |
| CN113834868A (en) * | 2021-09-06 | 2021-12-24 | 宁波盘福生物科技有限公司 | Device and method for rapidly detecting drugs in hair |
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| Publication number | Publication date |
|---|---|
| CN106525523B (en) | 2023-09-08 |
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