CN108269729A - A kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument - Google Patents
A kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument Download PDFInfo
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- CN108269729A CN108269729A CN201611255520.2A CN201611255520A CN108269729A CN 108269729 A CN108269729 A CN 108269729A CN 201611255520 A CN201611255520 A CN 201611255520A CN 108269729 A CN108269729 A CN 108269729A
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/022—Circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
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Abstract
The present invention relates to a kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instruments.Including High-Field asymmetric waveform transference tube, ion source is equipped in High-Field asymmetric waveform transference tube, first Disengagement zone, second Disengagement zone, bias electrode and Weak current signal detection electrode, first Disengagement zone is made of the first ion isolation electrode and the second ion isolation electrode, and first ion isolation electrode be connected with pre-separation voltage source, second ion isolation electrode is connected with direct voltage source, second Disengagement zone is made of third ion isolation electrode and the 4th ion isolation electrode, and third ion isolation electrode is connected with separation voltage source, 4th ion isolation electrode is connected with dc sweeps voltage source, bias electrode is connected with bias voltage source, Weak current signal detection electrode is connected with light current flux detector.The present invention considerably reduces required separation voltage value, and improve accuracy of detection in the case where not sacrificing High-Field asymmetric waveform ionic migration spectrum detection sensitivity.
Description
Technical field
The present invention relates to ionic migration spectrometer fields, and in particular to a kind of plate armature High-Field asymmetric waveform ion moves
Move spectrum combined instrument.
Background technology
High-Field asymmetric waveform ion mobility spectrometry, principle are moved based on ion its ion under high existing fringing field collective effect
Shifting rate nonlinear change occurs and realize the high score of substance from and identification.The technology have simple in structure, ionic availability high and
A series of advantages such as continuous are detected, have been widely used in fields such as explosive, drugs and volatile organic matters.The technology
It is proposed first by the former Soviet Union, structure is using the either coaxial cylindrical structure of two parallel plate electrodes（Migration area）With
One ion acquisition electrode, sample enter ionization area with carrier gas and are ionized, and the sample ions after ionization enter with carrier gas moves
Area is moved, ion does repeatedly concussion movement up and down, and every time under the action of migration area is by high-frequency electric field within one period
Concussion movement can all move a unit to vertical migration area pole plate, by repeatedly move sample ions finally get on pole plate and
Bury in oblivion, sample characteristic ion can be made to continue through migration area if applying a direct current compensation voltage on migration area pole plate, into
And be detected by the detector, obtained sample spectrogram can be used as the analysis of sample.High-Field asymmetric waveform ion mobility spectrometry spectrometer
With simple in structure, ionic availability be high and a series of extensive use for advantages, at the scene detection field such as detection is continuous.
High-Field asymmetric waveform ion mobility spectrometry ionic mobility under high electric field effect occurs nonlinear change and realizes object
Matter accurately identifies, when separation voltage increase, the detection that High-Field asymmetric waveform ion mobility spectrometer is greatly lowered is sensitive
Degree is unfavorable for trace materials detection, and the general volume of existing high-pressure modular is larger, it is difficult to be moved in High-Field asymmetric waveform ion
It moves spectrum migration tube and ensures Highgrade integration, this all constrains High-Field asymmetric waveform ion mobility spectrometer and the fields such as detects at the scene
Performance.Trace detection relies primarily on sample spectrum elucidation to High-Field asymmetric waveform ion mobility spectrometry at the scene, and sample spectrogram accumulates
Contain a large amount of information, including flow field, electric field, ionic mobility and offset voltage-separation voltage relation information, these information
It obtains and depends on clean sample spectrogram, however under complex environment, under the conditions of same separation voltage, most materials
Corresponding offset voltage value difference is different smaller in the sample spectrogram of characteristic ion, leads to High-Field asymmetric waveform ion mobility spectrometer
Each substance spectrogram registration obtained when detecting at the scene is high, and when separation voltage is smaller, the compensation corresponding to substance ion
Voltage value is near zero volt, and whens ionization source Ionization Samples has generated ion cluster, and these ion cluster molecule amounts are big, and ion moves
Shifting rate is small, and offset voltage value does not increase, this will all be unfavorable for sample substantially also near zero volt with the increase of separation voltage
Accurate detection, analysis.These methods effectively raise High-Field asymmetric waveform ion mobility spectrometer detection resolution, but its
Detection cycle is improved during complicated use, is unfavorable for High-Field asymmetric waveform ion mobility spectrometer and quickly detects at the scene
With analysis sample.
Patent CN200710023322 uses the High-Field asymmetric waveform ion mobility spectrometer of medium discharge ionization source, realizes
High-Field asymmetric waveform ion mobility spectrometry migration tube and ionization source it is highly integrated, reduce the overall volume of instrument.But it deposits
In problems with：First, separate substance needs larger separation voltage value under complex environment, separation voltage source module is caused
Volume is larger, it is difficult to which system altitude integrates, and causes FAIMS spectrometer volumes larger；Second, when analyzing multimodal substance, can not obtain
Obtain the relation spectrum of each complete separation voltage-offset voltage in peak.
Invention content
It, should be from the purpose of the present invention is to provide a kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument
Sub- migration spectrum solves separation voltage value and brings that sensitivity is low, power module volume is big and complex condition completely detaches electricity greatly
The problems such as pressure-offset voltage spectrogram is difficult to obtain is High-Field asymmetric waveform ion mobility spectrometry scene neck under low electric field condition
The application in domain provides reliable technical solution.
To achieve the above object, present invention employs following technical schemes：Including High-Field asymmetric waveform transference tube,
Ion source, the first Disengagement zone, the second Disengagement zone, bias electrode and weak are equipped in the High-Field asymmetric waveform transference tube
Current detection electrode, first Disengagement zone are made of, and first the first ion isolation electrode and the second ion isolation electrode
Ion isolation electrode is connected with pre-separation voltage source, and the second ion isolation electrode is connected with direct voltage source, described second point
It is made of from area third ion isolation electrode and the 4th ion isolation electrode, and third ion isolation electrode and separation voltage source phase
Even, the 4th ion isolation electrode is connected with dc sweeps voltage source, and the bias electrode is connected with bias voltage source, described
Weak current signal detection electrode is connected with light current flux detector.
Between first Disengagement zone and the second Disengagement zone, the second Disengagement zone and bias electrode and Weak current signal detection electrode
Bucking electrode is respectively equipped with, the bucking electrode is connected with shielding electrode system.
The first ion isolation electrode and third ion isolation electrode, the second ion isolation electrode and the 4th ion point
It is set respectively between electrode, third ion isolation electrode and bias electrode, the 4th ion isolation electrode and Weak current signal detection electrode
There is bucking electrode.
The ion source is vacuum UV lamp, and the ion source is fixed on ion source substrate.
The ion source substrate is made of the saturating ultraviolet light glass of magnesium fluoride or high borosilicate BF33 glass.
The High-Field asymmetric waveform transference tube is equipped with air inlet and air outlet, and the ion source is located at air inlet
Mouthful upper end, air pump is equipped at the air outlet.
The first ion isolation electrode, the second ion isolation electrode, third ion isolation electrode, the 4th ion isolation
Electrode, bias electrode and Weak current signal detection electrode are separately fixed in supporting beam.
The supporting beam is made of ceramics or glass.
The first ion isolation electrode, the second ion isolation electrode, third ion isolation electrode, the 4th ion isolation
Electrode, bias electrode and Weak current signal detection electrode print silver paste on ceramics using thick-film technique.
The first ion isolation electrode, the second ion isolation electrode, third ion isolation electrode, the 4th ion isolation
Electrode, bias electrode and Weak current signal detection electrode are using magnetron sputtering technique sputtering target material gold on glass.
As shown from the above technical solution, the present invention is made by being set as high-frequency asymmetric waveform low pressure in the first Disengagement zone
Pre-separation is realized to substance for pre-separation voltage source and fixed DC voltage value, reduces High-Field asymmetric waveform ion mobility spectrometry
Separation voltage value, and reduce the separation voltage volume source of the technology, and without reducing High-Field asymmetric waveform ion mobility spectrometry
Detection sensitivity, in addition to this, it is also possible to obtain the complete sample separation voltage-offset voltage spectrogram of complex condition carries
High High-Field asymmetric waveform ionic migration spectrum detection precision.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
Migration spectrum includes air-channel system, migration tube, TT＆C system and input-output system etc., and this patent is intended to carry out migration tube
It stresses, remaining does not refer to that structure can be found in the prior art.
A kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument as shown in Figure 1, it is not right including High-Field
Claim waveform ion mobility tube 1, ion source 2, the first Disengagement zone, the second separation are equipped in High-Field asymmetric waveform transference tube 1
Area, bias electrode 3 and Weak current signal detection electrode 4, the first Disengagement zone is by the first ion isolation electrode 5 and the second ion isolation electrode
6 are formed, and the first ion isolation electrode 5 is connected with pre-separation voltage source 7, the second ion isolation electrode 6 and 8 phase of direct voltage source
Even, the second Disengagement zone is made of third ion isolation electrode 9 and the 4th ion isolation electrode 10, and third ion isolation electrode 9
It is connected with separation voltage source 11, the 4th ion isolation electrode 10 is connected with dc sweeps voltage source 12, bias electrode 3 and biased electrical
Potential source 13 is connected, and Weak current signal detection electrode 4 is connected with light current flux detector 14.Light current flux detector 14 is used to detect sample ions
It draws to generated weak current on Weak current signal detection electrode.
Pre-separation voltage source 7 is high frequency, low-voltage source, and direct voltage source 8 is the direct voltage source that can set fixed numbers,
Separation voltage source 11 is high frequency, can continue to increase adjustable high-voltage source to high voltage from zero, and dc sweeps voltage source 12 is
The direct voltage source of lasting scanning from negative 30V to positive 30V, the ion traction for acting as making flowing through migration tube of bias voltage source
To Weak current signal detection module.Wherein, pre-separation voltage source 7 can be from standard sample characteristic ion with the setting of direct voltage source 8
It is calculated in standard spectrogram；Fixed high-frequency is applied respectively to the first ion isolation electrode 5 and the second ion isolation electrode 6
Asymmetric waveform voltage and DC voltage realize the pre-separation of substance, greatly reduce High-Field asymmetric waveform ion mobility spectrometry
Separation voltage value, solve that equipment instrument caused by High-Field asymmetric waveform ion mobility spectrometer high voltage is big, integrated level
The low, problems such as detection sensitivity is low, realize the Highgrade integration of instrument, reduce the overall volume of instrument, and improve instrument
The accuracy of detection of device.
Further, the first Disengagement zone and the second Disengagement zone, the second Disengagement zone and bias electrode 3 and Weak current signal detection electrode
Bucking electrode 15 is respectively equipped between 4, bucking electrode 15 is connected with shielding electrode system 16, shielding electrode system 16 and entire sample
It links together to machine, for shielding the mutual string between its Testing of Feeble Signals of outside electromagnetic interference and migration tube internal electric field
It disturbs.Specifically, i.e. the first ion isolation electrode 5 and third ion isolation electrode 9, the second ion isolation electrode 6 and the 4th from
Son separation electrode 10, third ion isolation electrode 9 and bias electrode 3, the 4th ion isolation electrode 10 and Weak current signal detection electrode
Bucking electrode 15 is respectively equipped between 14.
Further, ion source 2 is vacuum UV lamp, and ion source 2 is fixed on ion source substrate 17.Vacuum UV lamp leads to
Crossing photoelectric effect principle ionized sample molecule makes its ionization be ion.Gas is additionally provided in High-Field asymmetric waveform transference tube 1
Base board 30, gas circuit substrate 30 are made of ceramics, primarily to ensureing the leakproofness of entire gas circuit, and solderable on ceramics
Copper post facilitates inflow for gas.
Further, ion source substrate 17 is made of the saturating ultraviolet light glass of magnesium fluoride or high borosilicate BF33 glass.
Further, High-Field asymmetric waveform transference tube 1 is equipped with air inlet 19 and air outlet 20, and ion source 2 is located at
The upper end of air inlet 19 is equipped with air pump at air outlet 20.
Further, the first ion isolation electrode 5, the second ion isolation electrode 6, third ion isolation electrode the 9, the 4th from
Son separation electrode 10, bias electrode 3 and Weak current signal detection electrode 4 are separately fixed in supporting beam 18.
Further, supporting beam 18 is made of ceramics or glass.Ceramics and glass material are special with hardness height, high intensity etc.
Property, generally in the ceramics and sheet glass produced using die sinking patterning method, and further to its two-sided polishing, polishing, can obtain
High fine and close high smooth ceramics and substrate, and ceramics and glass have good mechanics, electricity, thermal property, can adopt between each other
High-precision, highly integrated and stable migration tube are produced with bonding techniques.
Further, supporting beam 18 for ceramics when, the first ion isolation electrode 5, the second ion isolation electrode 6, third from
Son separation electrode 9, the 4th ion isolation electrode 10, bias electrode 3 and Weak current signal detection electrode 4 print silver paste using thick-film technique
In on ceramics.
Further, supporting beam 18 be glass when, the first ion isolation electrode 5, the second ion isolation electrode 6, third from
Son separation electrode 9, the 4th ion isolation electrode 10, bias electrode 3 and Weak current signal detection electrode 4 are sputtered using magnetron sputtering technique
Target gold is on glass.
The operation principle and the course of work of the present invention is as follows：
Sample enters ionization area with carrier gas, by ion source ionization into measured ion is treated, continues to enter the first Disengagement zone with air-flow,
Pre-separation is obtained under the collective effect of pre-separation voltage and DC voltage, the ion after pre-separation continues to enter second with air-flow
Disengagement zone is detached, and drawn under the action of bias voltage under the collective effect of separation voltage and dc sweeps voltage
It is detected to Weak current signal detection electrode, and then by light current flux detector, generates sample ions spectrogram.Specifically, i.e. sample divides
Son 100 is towed under the action of air pump at ion source 2, and initial sample ion cluster 200 is formed under the action of ion source 2,
Initial sample ion cluster 200 enters under the action of air-flow to be made of the first ion isolation electrode 5 and the second ion isolation electrode 6
The first Disengagement zone, pre-separation voltage source to the first ion isolation electrode apply high-frequency asymmetric waveform low pressure source, direct current
Potential source applies fixed DC voltage value to the second ion isolation electrode, under its collective effect, to initial sample ion cluster 200
Carry out pre-separation；The ion of pre-separation continues to enter by third ion isolation electrode 9 and the 4th ion isolation electricity with air-flow
The second Disengagement zone that pole 10 forms, separation voltage source apply asymmetric waveform high pressure, dc sweeps to third ion isolation electrode
Voltage source applies dc sweeps voltage to the 4th ion isolation electrode, under its collective effect, to pre-separated ion again
Secondary to be detached, traction to weak current detects under the action of the bias voltage that the sample ions after separation are provided in bias voltage source
Device is simultaneously detected, and be input on display, shows required spectrogram.
The present invention passes through the pre-separation voltage source in the first Disengagement zone setting high-frequency asymmetric waveform low-voltage and fixation
DC voltage value realizes pre-separation to sample, reduces the separation voltage value of High-Field asymmetric waveform ion mobility spectrometry, and reduce and be somebody's turn to do
The separation voltage volume source of technology, and the complete separation voltage of complex condition sample-offset voltage spectrogram can be obtained, it improves
High-Field asymmetric waveform ionic migration spectrum detection precision, in the first Disengagement zone and the second Disengagement zone, the second Disengagement zone and biasing
Bucking electrode between electrode and Weak current signal detection electrode, with exclude pre-separation voltage source electric field caused by the first Disengagement zone with
Separation voltage source is in the mutual crosstalk of electric field caused by the second Disengagement zone, reduction separation voltage source caused by the second Disengagement zone
The influence that electric field works normally light current flux detector, for the technology, detection field provides reliable technical solution at the scene.
The beneficial effects of the present invention are：1）The present invention is by setting the first Disengagement zone to divide sample ions group in advance
From, and the first ion isolation electrode and the second ion isolation electrode apply pre-separation voltage and DC voltage respectively, realize substance
Pre-separation, greatly reduce the separation voltage value of High-Field asymmetric waveform ion mobility spectrometry, solve High-Field asymmetric waveform
The problems such as equipment instrument caused by ion mobility spectrometry high voltage is big, integrated level is low, detection sensitivity is low realize the height of instrument
It spends integrated, reduces the overall volume of instrument, and improve the detection sensitivity of instrument；2）The present invention passes through in the first separation
Bucking electrode 15 between area and the second Disengagement zone, the second Disengagement zone and bias electrode 3 and Weak current signal detection electrode 4 is set, is solved
The problems such as its mutual electric field crosstalk；3）High-frequency asymmetrical voltage that the present invention is provided by pre-separation voltage source and
The setting of direct voltage source amplitude can obtain the complete, clean separation voltage-offset voltage relation spectrum at sample ions peak
Information improves the accuracy of detection and resolution capability of instrument；4）The present invention realizes pre- point of substance by using the first Disengagement zone
From considerably reducing required separation electricity in the case where not sacrificing High-Field asymmetric waveform ionic migration spectrum detection sensitivity
Pressure value, and improve accuracy of detection.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art are to the technical side of the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain that claims of the present invention determines.
Claims (10)
1. a kind of plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument, it is characterised in that：Including High-Field asymmetry
Waveform ion mobility tube（1）, the High-Field asymmetric waveform transference tube（1）It is interior to be equipped with ion source（2）, first separation
Area, the second Disengagement zone, bias electrode（3）And Weak current signal detection electrode（4）, first Disengagement zone is by the first ion isolation electricity
Pole（5）And the second ion isolation electrode（6）It forms, and the first ion isolation electrode（5）With pre-separation voltage source（7）It is connected, the
Two ion isolation electrodes（6）With direct voltage source（8）It is connected, second Disengagement zone is by third ion isolation electrode（9）And
4th ion isolation electrode（10）It forms, and third ion isolation electrode（9）With separation voltage source（11）It is connected, the 4th ion point
From electrode（10）With dc sweeps voltage source（12）It is connected, the bias electrode（3）With bias voltage source（13）It is connected, it is described
Weak current signal detection electrode（4）With light current flux detector（14）It is connected.
2. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 1, it is characterised in that：
First Disengagement zone and the second Disengagement zone, the second Disengagement zone and bias electrode（3）And Weak current signal detection electrode（4）Between point
It She You not bucking electrode（15）, the bucking electrode（15）With shielding electrode system（16）It is connected.
3. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 2, it is characterised in that：
The first ion isolation electrode（5）With third ion isolation electrode（9）, the second ion isolation electrode（6）With the 4th ion
Detach electrode（10）, third ion isolation electrode（9）With bias electrode（3）, the 4th ion isolation electrode（10）It is examined with weak current
Survey electrode（14）Between be respectively equipped with bucking electrode（15）.
4. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 1, it is characterised in that：
The ion source（2）For vacuum UV lamp, the ion source（2）It is fixed on ion source substrate（17）On.
5. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 4, it is characterised in that：
The ion source substrate（17）It is made of the saturating ultraviolet light glass of magnesium fluoride or high borosilicate BF33 glass.
6. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 1, it is characterised in that：
The High-Field asymmetric waveform transference tube（1）Equipped with air inlet（19）And air outlet（20）, the ion source（2）Position
In air inlet（19）Upper end, the air outlet（20）Place is equipped with air pump.
7. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 1, it is characterised in that：
The first ion isolation electrode（5）, the second ion isolation electrode（6）, third ion isolation electrode（9）, the 4th ion point
From electrode（10）, bias electrode（3）And Weak current signal detection electrode（4）It is separately fixed at supporting beam（18）On.
8. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 7, it is characterised in that：
The supporting beam（18）It is made of ceramics or glass.
9. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 8, it is characterised in that：
The first ion isolation electrode（5）, the second ion isolation electrode（6）, third ion isolation electrode（9）, the 4th ion point
From electrode（10）, bias electrode（3）And Weak current signal detection electrode（4）Silver paste is printed on ceramics using thick-film technique.
10. plate armature High-Field asymmetric waveform ion mobility spectrometry combined instrument according to claim 8, feature exist
In：The first ion isolation electrode（5）, the second ion isolation electrode（6）, third ion isolation electrode（9）, the 4th ion
Detach electrode（10）, bias electrode（3）And Weak current signal detection electrode（4）Using magnetron sputtering technique sputtering target material gold in glass
On.
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| CN201611255520.2A CN108269729B (en) | 2016-12-30 | 2016-12-30 | Flat plate type structure high-field asymmetric waveform ion mobility spectrometry instrument |
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| CN201611255520.2A CN108269729B (en) | 2016-12-30 | 2016-12-30 | Flat plate type structure high-field asymmetric waveform ion mobility spectrometry instrument |
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| CN110687192A (en) * | 2019-10-25 | 2020-01-14 | 湘潭大学 | Trace compound measuring device and measuring method thereof |
| CN110828278A (en) * | 2019-11-15 | 2020-02-21 | 中国科学院大连化学物理研究所 | Positive and negative ion simultaneous measurement two-dimensional separation ion migration tube |
| CN112530783A (en) * | 2019-08-30 | 2021-03-19 | 株式会社岛津制作所 | Device for carrying out field asymmetric waveform ion mobility spectrometry |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112530783A (en) * | 2019-08-30 | 2021-03-19 | 株式会社岛津制作所 | Device for carrying out field asymmetric waveform ion mobility spectrometry |
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| CN110828278A (en) * | 2019-11-15 | 2020-02-21 | 中国科学院大连化学物理研究所 | Positive and negative ion simultaneous measurement two-dimensional separation ion migration tube |
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| CN108269729B (en) | 2020-07-28 |
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