CN206022308U - Microwave Induced Plasma ionic migration spectrometer - Google Patents
Microwave Induced Plasma ionic migration spectrometer Download PDFInfo
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- CN206022308U CN206022308U CN201621074635.7U CN201621074635U CN206022308U CN 206022308 U CN206022308 U CN 206022308U CN 201621074635 U CN201621074635 U CN 201621074635U CN 206022308 U CN206022308 U CN 206022308U
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- ion source
- induced plasma
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Abstract
This utility model discloses a kind of Microwave Induced Plasma ionic migration spectrometer, including ion source, sample feeding pipe, drift tube, air-channel system, signal amplifies collection and data handling system, ion source is Microwave Induced Plasma ion source, Microwave Induced Plasma ion source includes microwave power generator, microwave coupling chamber and discharge tube, microwave power generator connection microwave coupling chamber, microwave coupling chamber connects discharge tube, acceleration electrode is provided with front of discharge tube, sample feeding pipe connects drift tube, discharge tube connects drift tube, air-channel system, signal amplifies collection and is all connected with drift tube with data handling system.This utility model can improve the sensitivity of ionic migration spectrometer, widen the range of application of ion mobility spectrometry, improve the stability and service life of ion mobility spectrometry, be effectively prevented from the generation of sample ions fragment.
Description
Technical field
This utility model is related to technical field of analytical instruments, and in particular to a kind of Microwave Induced Plasma ion mobility spectrometry
Instrument.
Background technology
Ion mobility spectrometry (ion mobility spectrometry, IMS) is one kind that 20 century 70s grow up
Normal pressure analytical technology.Its operation principle：Under weak electric field (less than 1000V/cm), gas ion migration rate (V) and electric-field strength
Between degree, the relation of (E) is V=KE, and constant K is the mobility of ion, and generally different ions has under weak electric field
Different mobilitys, obtains migration rate and treats measured ion to obtain according to drift length of tube (L) and measure ion migration time (t)
Migration rate (V), according to drift length of tube (L) and be added in the voltage (U) at drift tube two ends and obtain electric field intensity (E), so as to
The mobility (K) of unknown material is obtained, so that qualitative detection is carried out to determinand.Simultaneously can be according to peak area to the dense of determinand
Degree carries out quantitative Analysis.Ionic migration spectrometer has a lot of features such as：Detectivity is high, cheap for manufacturing cost, fast response time,
Equipment instrument is little etc..It is widely used in explosive, gas, effumability organic contamination in drugs and atmospheric environment at present
The detection of thing.
Typically, IMS amplifies collection by ion source, drift tube, sampling system, air-channel system, signal and processing system is constituted.
Ion source is a critical part, and it determines the performance of ion mobility spectrometry.Ion source currently used for ion mobility spectrometry
There is radioactivity Ni63Source, corona discharge ionization source, laser ionization source, vacuum UV lamp ion source, electric spray ion source etc..Wherein
Radioactivity Ni63Ion source has a lot of advantages such as：Very high stability, long-life, low cost and any outer power-up is not needed
Source, but Ni63Use limited so as to limiting its range of application by law；Corona discharge is subject to the prestige of electrode corrosion
The side of body, so as to cause instrument unstable；The high cost of laser ionization source；The test limit of vacuum UV lamp ion mobility spectrometry is low (general
For ppm to ppb)；Electron spray is applied to fluid analysis and sample pre-treatments are complicated.
Utility model content
This utility model aims to provide a kind of Microwave Induced Plasma ionic migration spectrometer, it is possible to increase ion mobility spectrometry
The sensitivity of instrument, widens the range of application of ion mobility spectrometry, improves the stability and service life of ion mobility spectrometry, effectively keeps away
Exempt from the generation of sample ions fragment.
For reaching above-mentioned purpose, this utility model employs the following technical solutions realization：
Microwave Induced Plasma ionic migration spectrometer disclosed in this utility model, including ion source, sample feeding pipe, drift
Pipe, air-channel system, signal amplify collection and data handling system, the ion source be Microwave Induced Plasma ion source, institute
Stating Microwave Induced Plasma ion source includes that microwave power generator, microwave coupling chamber and discharge tube, the microwave power are sent out
Raw device connection microwave coupling chamber, the microwave coupling chamber connect discharge tube, are provided with acceleration electrode in front of the discharge tube, described enter
Sample pipe connects drift tube, and the discharge tube connects drift tube, and it is equal with data handling system that the air-channel system, signal amplify collection
Connection drift tube.
Preferably, the microwave coupling chamber is that cylinder, microwave coupling chamber are provided with N connector, and the microwave power occurs
Device connects microwave coupling chamber by coaxial cable, and the discharge tube is coaxial with microwave coupling chamber.
Preferably, the drift tube includes ion source region, ion gate and drift region, the ion source region, ion gate and drift
Move area sequentially coaxially to arrange and connect, the side wall winding conducting ring of the drift tube, is dead ring between adjacent conducting ring, institute
State discharge tube, sample feeding pipe and connect ion source region, the axis of discharge tube is vertical with the axis of drift tube and is generally aligned in the same plane.
Preferably, radial dimension of the radial dimension of the ion source region less than drift region；The acceleration electrode is circle,
Electrode is accelerated to be arranged on the one end of ion source region away from ion gate.
Preferably, the discharge tube is quartz ampoule or earthenware, and discharge tube is hollow pipe, and the external diameter of discharge tube is 6mm, interior
Footpath is 1～4mm.
Preferably, the top of the discharge tube is not more than 2mm with the distance of ion source region inwall.
Further, Faraday plate is set in the drift region, the Faraday plate is coaxial with drift tube, Faraday plate and
Signal is amplified collection and is electrically connected with data handling system.
As one kind preferably, the drift region opens up drift gas entrance, the drift gas entrance away from the end of ion gate
Connection air-channel system, accelerates the center of electrode to open up air vent A, and the sample feeding pipe is sample feeding pipe A, and the sample feeding pipe A wears
The side wall of ion source region is crossed, sample feeding pipe A is arranged between ion gate and discharge tube, the axis of sample feeding pipe A and the axis of drift tube
Vertically.
As another kind preferably, the drift region opens up drift gas entrance away from the end of ion gate, and the drift gas enters
Mouth connection air-channel system, the ion source region open up air vent B, the sample feeding pipe on the side wall between ion gate and discharge tube
For sample feeding pipe B, the sample feeding pipe B is through the center for accelerating electrode.
Preferably, the work gas of the discharge tube are argon or helium.
This utility model has following technique effect：
1st, Microwave Induced Plasma ion source can produce substantial amounts of chemically reactive substance, and water microwave is had stronger
Absorption, therefore, it is possible to produce substantial amounts of hydrated agent ion, so as to improve the sensitivity of ionic migration spectrometer.
2nd, Microwave Induced Plasma ion source is cold ion source, can widen the application model of ion mobility spectrometry
Enclose.
3rd, Microwave Induced Plasma ion source is polluted without high-tension electricity danger and electrode corrosion without the need for built-in sparking electrode
Impact, it is thus possible to effectively improve the stability and service life of ion mobility spectrometry.
4th, Microwave Induced Plasma flame is not directly contacted with sample, can be effectively prevented from the life of sample ions fragment
Into.
5th, this utility model can carry out negative ions pattern in the case of a drift tube and be switched fast.
Description of the drawings
Structural representations of the Fig. 1 for embodiment 1.
Structural representations of the Fig. 2 for embodiment 2.
In figure：1- drift tubes, 2- ion source regions, 3- drift regions, 4- accelerate electrode, 6- discharge tubes, 7-N type joints, 8- micro-
Ripple coupled cavity, 10- ion gates, 11- conducting rings, 12- dead rings, 13- Faraday plates, 14- signals amplify collection and data processing
System, 15- drift gas entrances, 51- air vent A, 52- air vent B, 91- sample feeding pipe A, 92- sample feeding pipe B.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing, to this reality
It is further elaborated with new.
Embodiment 1
As shown in figure 1, the present embodiment is suitable for working in one-way gas flow mode, including ion source, sample feeding pipe, drift tube 1, gas
Road system, electric-control system, signal amplify collection and data handling system 14；Drift tube 1 is by several metallic conduction rings 11 and absolutely
Edge ring 12 replaces the hollow pipe of close-packed arrays composition, the main ion source region 2, ion gate for including sequentially coaxially arranging and connecting
10th, 3 three bulk of drift region；Ion source be Microwave Induced Plasma ion source, including microwave power generator, coaxial cable,
Microwave coupling chamber 8, N connector 7, discharge tube 6, work gas.Microwave generator connects the N in microwave coupling chamber 8 by coaxial cable
Type joint 7, discharge tube 6 are coaxially connected with microwave coupling chamber 8, the dead ring 12 or conducting ring 11 of discharge tube 6 and ion source region 2
Closely connect；Discharge tube used 6 is that quartz ampoule or earthenware, its internal diameter arrive 4mm, external diameter 6mm for 1, and discharge tube 6 is perpendicular to drift
Pipe axially mounted.6 one end of discharge tube is passed through work gas, and work gas are argon or helium, in other end and ion source region 2
Close proximity between wall, its distance are maintained between ± 2mm, and the aspiration microwave energy that works produces stable plasma, etc.
The a small amount of nitrogen in active substance and work gas, oxygen, vapor effect reaction of formation ion in gas ions；These ions with
And some metastable ar atmos for not reacted and argon ion are entered ion source region by gas flow purging；Now drift gas is by drifting about
Gas entrance 15 enters drift tube, drifts about gas in ion source region and produces final reagent with the chemically reactive substance effect for purging out
Ion, waste gas are discharged by air vent A51, and air vent A51 is opened in the center for accelerating electrode；6 front end of discharge tube is provided with
Electrode 4, reagent ion is accelerated to move towards 10 direction of ion gate in the presence of electrode 4 is accelerated；Now sample molecule is by sample introduction
Pipe A91 enters into ion source region 2 and generates product ion with reagent ion crash response.Sample feeding pipe A91 installed in discharge tube with from
Between cervical orifice of uterus, between sample feeding pipe A91 and discharge tube, 5mm and above distance is kept, so that reagent ion is abundant with sample molecule
Haptoreaction so that Ionization Efficiency reaches most preferably.Sample ions and unreacted completely reagent ion in the presence of electric field
The ion gate that is opened by periodicity enters into drift region, and now on the one hand determinand ion is accelerated by electric field, on the one hand
Slowed down by reverse excursion gas, generally determinand bulk of molecule, spatial form, quality are different, therefore in drift
The slowing effect that area is subject to is different, ultimately results in movement rate of the different determinand ions in drift region different so as to be measured
The time that thing ion reaches Faraday plate 13 is variant and obtain separation detection；Amplify collection and number with signal in 1 rear end of drift tube
According to 14 tight connection of processing system, the signal of telecommunication amplifies through amplifier, then then carries out data by capture card gathered data
Reason obtains the mobility of determinand.
Embodiment 2
As shown in Fig. 2 the present embodiment is suitable for working in two-way airflow mode, including ion source, sample feeding pipe, drift tube 1, gas
Road system, electric-control system, signal amplify collection and data handling system 14；Drift tube 1 is by several metallic conduction rings 11 and absolutely
Edge ring 12 replaces the hollow pipe of close-packed arrays composition, the main ion source region 2, ion gate for including sequentially coaxially arranging and connecting
10th, 3 three bulk of drift region；Ion source be Microwave Induced Plasma ion source, including microwave power generator, coaxial cable,
Microwave coupling chamber 8, N connector 7, discharge tube 6, work gas.Microwave generator connects the N in microwave coupling chamber 8 by coaxial cable
Type joint 7, discharge tube 6 are coaxially connected with microwave coupling chamber 8, the dead ring 12 or conducting ring 11 of discharge tube 6 and ion source region 2
Closely connect；Discharge tube used 6 is that quartz ampoule or earthenware, its internal diameter arrive 4mm, external diameter 6mm for 1, and discharge tube 6 is perpendicular to drift
Pipe axially mounted.6 one end of discharge tube is passed through work gas, and work gas are argon or helium, in other end and ion source region 2
Close proximity between wall, its distance are maintained between ± 2mm, and the aspiration microwave energy that works produces stable plasma, etc.
The a small amount of nitrogen in active substance and work gas, oxygen, vapor effect reaction of formation ion in gas ions；These ions with
And some metastable ar atmos for not reacted and argon ion are entered ion source region by gas flow purging；Now drift gas is by drifting about
Gas entrance 15 enters drift tube, drifts about gas in ion source region 2 and produces final examination with the chemically reactive substance effect for purging out
Agent ion, waste gas are discharged by air vent B52, and air vent B52 is opened in side wall of the ion source region between ion gate and discharge tube
On；Discharge tube front end is provided with acceleration electrode 4, and reagent ion is moved towards 10 direction of ion gate in the presence of electrode 4 is accelerated；
Now sample molecule enters into ion source region by sample feeding pipe B92 and generates product ion, sample feeding pipe B92 with reagent ion crash response
Installed in electrode centers, sample ions and unreacted is accelerated, completely reagent ion is opened by periodicity in the presence of electric field
Ion gate enter into drift region, on the one hand now determinand ion is accelerated by electric field, on the one hand by reverse excursion gas
Deceleration, generally determinand bulk of molecule, spatial form, quality be different, and the deceleration being therefore subject in drift region is imitated
Fruit is different, ultimately results in movement rate of the different determinand ions in drift region different so that determinand ion reaches farad
Time of disk 13 is variant and obtains separation detection；Drift tube rear end amplifies collection with signal and data handling system 14 is tight
Connection, the signal of telecommunication are amplified through amplifier, and then by capture card gathered data, then carrying out data processing obtains moving for determinand
Shifting rate.
Certainly, this utility model can also have other various embodiments, spiritual and its substantive without departing substantially from this utility model
In the case of, those of ordinary skill in the art can make various corresponding changes and deformation, but these phases according to this utility model
The change and deformation that answers should all belong to the scope of the claims appended by this utility model.
Claims (10)
1. Microwave Induced Plasma ionic migration spectrometer, amplifies including ion source, sample feeding pipe, drift tube, air-channel system, signal
Collection and data handling system, it is characterised in that：The ion source is Microwave Induced Plasma ion source, described microwave induced
Plasma ion source includes microwave power generator, microwave coupling chamber and discharge tube, and the microwave power generator connection is micro-
Ripple coupled cavity, the microwave coupling chamber connect discharge tube, are provided with acceleration electrode, the sample feeding pipe connection drift in front of the discharge tube
Pipe is moved, the discharge tube connects drift tube, and the air-channel system, signal amplify collection and be all connected with drifting about with data handling system
Pipe.
2. Microwave Induced Plasma ionic migration spectrometer according to claim 1, it is characterised in that：The microwave coupling
Chamber is that cylinder, microwave coupling chamber are provided with N connector, and the microwave power generator connects microwave coupling by coaxial cable
Chamber, the discharge tube are coaxial with microwave coupling chamber.
3. Microwave Induced Plasma ionic migration spectrometer according to claim 1 and 2, it is characterised in that：The drift
Pipe includes that ion source region, ion gate and drift region, the ion source region, ion gate sequentially coaxially arrange with drift region and connect,
The side wall winding conducting ring of the drift tube, is dead ring between adjacent conducting ring, the discharge tube, sample feeding pipe connect from
Component area, the axis of discharge tube is vertical with the axis of drift tube and is generally aligned in the same plane.
4. Microwave Induced Plasma ionic migration spectrometer according to claim 3, it is characterised in that：The ion source region
Radial dimension less than drift region radial dimension；Described acceleration electrode for circle, accelerate electrode installed in ion source region away from
One end of ion gate.
5. Microwave Induced Plasma ionic migration spectrometer according to claim 3, it is characterised in that：The discharge tube is
Quartz ampoule or earthenware, discharge tube is hollow pipe, and it is 1～4mm that the external diameter of discharge tube is 6mm, internal diameter.
6. Microwave Induced Plasma ionic migration spectrometer according to claim 3, it is characterised in that：The discharge tube
Top is not more than 2mm with the distance of ion source region inwall.
7. Microwave Induced Plasma ionic migration spectrometer according to claim 3, it is characterised in that：In the drift region
Faraday plate is set, and the Faraday plate is coaxial with drift tube, Faraday plate amplifies collection with data handling system electricity with signal
Connection.
8. Microwave Induced Plasma ionic migration spectrometer according to claim 4, it is characterised in that：The drift region is remote
The end of luxuriant cervical orifice of uterus opens up drift gas entrance, accelerates the center of electrode to open up air vent A, and the sample feeding pipe is sample feeding pipe
The side wall of A, the sample feeding pipe A through ion source region, sample feeding pipe A are arranged between ion gate and discharge tube, the axis of sample feeding pipe A
Vertical with the axis of drift tube.
9. Microwave Induced Plasma ionic migration spectrometer according to claim 4, it is characterised in that：The drift region is remote
The end of luxuriant cervical orifice of uterus opens up drift gas entrance, and the ion source region opens up aerofluxuss on the side wall between ion gate and discharge tube
Mouth B, the sample feeding pipe are sample feeding pipe B, and the sample feeding pipe B is through the center for accelerating electrode.
10. Microwave Induced Plasma ionic migration spectrometer according to claim 1, it is characterised in that：The discharge tube
Work gas be argon or helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621074635.7U CN206022308U (en) | 2016-09-23 | 2016-09-23 | Microwave Induced Plasma ionic migration spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621074635.7U CN206022308U (en) | 2016-09-23 | 2016-09-23 | Microwave Induced Plasma ionic migration spectrometer |
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| Publication Number | Publication Date |
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| CN206022308U true CN206022308U (en) | 2017-03-15 |
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| CN201621074635.7U Active CN206022308U (en) | 2016-09-23 | 2016-09-23 | Microwave Induced Plasma ionic migration spectrometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298428A (en) * | 2016-09-23 | 2017-01-04 | 四川大学 | Microwave Induced Plasma ionic migration spectrometer |
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2016
- 2016-09-23 CN CN201621074635.7U patent/CN206022308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298428A (en) * | 2016-09-23 | 2017-01-04 | 四川大学 | Microwave Induced Plasma ionic migration spectrometer |
| CN106298428B (en) * | 2016-09-23 | 2018-03-30 | 四川大学 | Microwave Induced Plasma ionic migration spectrometer |
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