CN206292080U - A kind of Thermal desorption injector for ionic migration spectrometer - Google Patents
A kind of Thermal desorption injector for ionic migration spectrometer Download PDFInfo
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- CN206292080U CN206292080U CN201720001000.2U CN201720001000U CN206292080U CN 206292080 U CN206292080 U CN 206292080U CN 201720001000 U CN201720001000 U CN 201720001000U CN 206292080 U CN206292080 U CN 206292080U
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- thermal desorption
- room
- ptc heating
- heating plates
- ionic migration
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Abstract
The utility model discloses a kind of Thermal desorption injector for ionic migration spectrometer, including sample introduction entrance, Thermal desorption room, PTC heating plates, the Thermal desorption chamber interior have front-end and back-end with the air flue of ft connection；The sample introduction entrance is communicated in the front end of the Thermal desorption room, and the outer wall that the PTC heating plates are then close to the Thermal desorption room is set；U-shaped optoelectronic switch is also included, the U-shaped optoelectronic switch is electrically connected to the PTC heating plates located at the rear portion of the sample introduction entrance；In addition, making U-shaped optoelectronic switch be electrically connected to ionic migration spectrometer.The utility model provides thermal source using PTC heating plates, coordinate the sampling unit insertion decision mechanism set by sample introduction entrance, realize programmable temperature programming pattern, testing sample is directly heated, sampling efficiency is substantially increased, the trace residue of determinand can be carried out sensitive and easily detected.
Description
Technical field
The utility model is related to ion mobility spectrometry detection technique field, and in particular to a kind of heat for ionic migration spectrometer
Parsing sampling device, is detected by the way of Thermal desorption to solid testing sample.
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 small to be easy to
Type, it is low in energy consumption the advantages of, it can in seconds detect mail, parcel and the different shape such as luggage, various sizes of
Explosive and drugs in object, while can be used for detecting human body impedimenta.It is main in current safety check in the market
Dangerous material (such as explosive, drugs) are detected using ion mobility spectrometry detection technique.In ion mobility spectrometry instrument, all with one
Individual sampling device, this device can carry out gasification parsing to the solid particle or gas that enter, and the sample molecule for gasifying afterwards exists
Enter ionized region under the guiding of air-flow, the sample ions being ionized enter migration area, the difference according to the flight time realizes molecule
Discriminating.
Thermal desorption injector is its performance quality for the essential element in Ion transfer 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 the heat time is different according to heating rod power, current use time scope 10-30min.Heating
It is slow, and observable index is higher for instrument.
Utility model content
In view of the shortcomings of the prior art, the utility model aims to provide a kind of Thermal desorption sample introduction for ionic migration spectrometer
Device, thermal source is provided using PTC heating plates, coordinates the sampling unit insertion decision mechanism set by sample introduction entrance, is realized programmable
Temperature programming pattern, testing sample is directly heated, substantially increase sampling efficiency, the trace residue of determinand can be carried out
It is sensitive and easily detect.
To achieve these goals, the utility model 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
State Thermal desorption chamber interior have front-end and back-end with the air flue of ft connection；The sample introduction entrance is communicated in the Thermal desorption room
Front end, the outer wall that the PTC heating plates are then close to the Thermal desorption room is set；Also include U-shaped optoelectronic switch, the U-shaped
Optoelectronic switch is electrically connected to the PTC heating plates located at the rear portion of the sample introduction entrance；In addition, making U-shaped optoelectronic switch be electrically connected
It is connected to ionic migration spectrometer.
Sampling cloth inserts injector by sample introduction entrance after sampling, U-shaped optoelectronic switch can be produced and 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.Because PTC heating plates have the characteristics such as heating power is high, voltage range is wide, profile can be designed, Thermal desorption room programming rate
Hurry up, maximum temperature is up to 300 DEG C.
Further, the Thermal desorption room includes being pressed 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 is by 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-types sections, is set respectively
The upper and lower part of Thermal desorption chamber interior is placed in, then sampling cloth can have regardless of positive and negative in gatherer process to determinand
Effect collection.The structure of the Resolution Room is conducive to gasification, filtering and the collection of sample.And PTC heating plates are directly fitted in parsing
The outer wall of room train wheel bridge and lower plate, the way of contact is contacted for face, substantially increases heat transfer efficiency.
Further, the end of the Thermal desorption room is provided with polytetrafluoro ring, the carrier gas for sealing docking transference tube
Entrance.End with Thermal desorption room sets polytetrafluoro ring, can cause that the air flue end in Thermal desorption room passes through polytetrafluoro ring pressure
The carrier gas inlet of tight transference tube so that both seal docking, so that the testing sample of gasification is with transference tube
Carrier gas smoothly enters inside transference tube.
Further, the air flue of the Thermal desorption chamber interior is in integrally strip.
The beneficial effects of the utility model are：
1st, the utility model is provided with U-shaped optoelectronic switch as sampling cloth insertion decision mechanism in sample introduction entrance, works as sampling
U-shaped optoelectronic switch is detected and is driven ionic migration spectrometer and PTC heating plates unlatching mode of operation during cloth insertion injector, real
Show programmable temperature programming pattern, substantially increase sampling efficiency, and effectively reduce sampler power consumption.
2nd, by setting 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 collection, the structure is conducive to gasification, filtering and the collection of sample.
3rd, the air-breathing pickup area in Resolution Room has been arranged on the utility model the center of sampling cloth effective coverage,
The advantage is that the detectable substance that can effectively suck gasification.
4th, the utility model 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 heat transfer efficiency greatly.
6th, the Thermal desorption room of strip crack shape is applied to the sample mode using cloth of sampling, and farthest reduces
The volume of Thermal desorption injector, so as to effectively reduce the volume of ion mobility spectrometry instrument.
Brief description of the drawings
Fig. 1 is the side cross-section schematic diagram of utility model；
Fig. 2 is the three-dimensional schematic cross-section of utility model；
Specific embodiment
Below with reference to accompanying drawing, the utility model will be further described, it is necessary to explanation, the present embodiment is with this skill
Premised on art scheme, detailed implementation method and specific operating process is given, but protection domain of the present utility model is not
It is limited to the present embodiment.
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 outer wall that the PTC heating plates 5 are then close to the Thermal desorption room is set；The use
U-shaped optoelectronic switch 2 is also included in the Thermal desorption injector of ionic migration spectrometer, the U-shaped optoelectronic switch 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 optoelectronic switch 2 be electrically connected to ionic migration spectrometer.
It should be noted that U-shaped optoelectronic switch is arranged on sample introduction entry back, U-shaped optoelectronic switch is normally opened.Sampling cloth is being adopted
Injector is inserted by sample introduction entrance after sample, U-shaped optoelectronic switch can be produced and blocked, U-shaped optoelectronic switch exports high after detecting
Level, drives the PTC heating plates to start working, it is achieved thereby that programmable temperature programming pattern.Due to PTC heating plates tool
There are the characteristics such as heating power is high, voltage range is wide, profile can be designed, Thermal desorption room programming rate is fast, and maximum temperature is up to 300
℃。
Further, the Thermal desorption room is including 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 is by 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 part of Thermal desorption chamber interior is arranged at, then sampling cloth can be carried out regardless of positive and negative in gatherer process to determinand
Effectively collection.The structure of the Resolution Room is conducive to gasification, filtering and the collection of sample.And PTC heating plates are directly fitted in solution
The outer wall of analysis room train wheel bridge and lower plate, the way of contact is contacted for face, substantially increases heat transfer efficiency.Resolution Room train wheel bridge is conciliate
Analysis room lower plate is fastened by screw group and combined.
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
Analyse the lateral surface of room lower plate 3.Heating plate fixed plate 6 is locked by modes such as screws with Resolution Room train wheel bridge or lower plate
Tightly.
Further, the end of the Thermal desorption room is provided with polytetrafluoro ring 7, the load for sealing docking transference tube
Gas entrance 9, the front end of carrier gas inlet 9 is coated with pellicle 8, for filtering the impurity in gasification testing sample.In Thermal desorption room
End polytetrafluoro ring 7 is set, can cause that the air flue end in Thermal desorption room compresses transference tube by polytetrafluoro ring
Carrier gas inlet so that both seal docking so that gasification testing sample with transference tube carrier gas 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 cloth of sampling, sampling cloth is entered by sample introduction entrance 1, and U-shaped light is established by cable
After pass 2 detects sampling cloth entrance, high trigger signal is sent, drive two PTC heating plates 5, and start Ion transfer
Spectrometer, the asepwirator pump of ionic migration spectrometer inhales testing sample toward the direction of ionic migration spectrometer；Sampling cloth is in Thermal desorption room
Air flue in by turning into testing sample steam after quick heating, the testing sample of gasification simultaneously by two L-type air flues toward from
Sub- migration tube carrier gas inlet direction motion, so sampling two acquisition surfaces of cloth to testing sample carried out effective receipts
Collection, then converges to up to the pellicle 8 between the air flue and the carrier gas inlet of transference tube of Thermal desorption room, in front of pellicle
High-speed cruising, the air-flow group of large area 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 change and deformation should be construed as being included in the utility model scope of the claims it
It is interior.
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 front-end and back-end with the air flue of ft connection；The sample introduction entrance is communicated in described
The front end of Thermal desorption room, the outer wall that the PTC heating plates are then close to the Thermal desorption room is set；U-shaped light is also included to establish by cable
Close, the U-shaped optoelectronic switch is electrically connected to the PTC heating plates located at the rear portion of the sample introduction entrance；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, the carrier gas inlet for sealing 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 |
|---|---|---|---|
| CN201720001000.2U CN206292080U (en) | 2017-01-03 | 2017-01-03 | A kind of Thermal desorption injector for ionic migration spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720001000.2U CN206292080U (en) | 2017-01-03 | 2017-01-03 | A kind of Thermal desorption injector for ionic migration spectrometer |
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| CN206292080U true CN206292080U (en) | 2017-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991278A (en) * | 2017-12-28 | 2018-05-04 | 湖南华南光电科技股份有限公司 | Heating sampling structure based on fluorescent quenching technology trace explosive detector |
-
2017
- 2017-01-03 CN CN201720001000.2U patent/CN206292080U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991278A (en) * | 2017-12-28 | 2018-05-04 | 湖南华南光电科技股份有限公司 | Heating sampling structure based on fluorescent quenching technology trace explosive detector |
| CN107991278B (en) * | 2017-12-28 | 2024-04-26 | 湖南华南光电科技股份有限公司 | Heating sample injection structure of trace explosive detector based on fluorescence quenching technology |
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