CN109283039A - A kind of gas molecule concentrated method and device - Google Patents
A kind of gas molecule concentrated method and device Download PDFInfo
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- CN109283039A CN109283039A CN201811230243.9A CN201811230243A CN109283039A CN 109283039 A CN109283039 A CN 109283039A CN 201811230243 A CN201811230243 A CN 201811230243A CN 109283039 A CN109283039 A CN 109283039A
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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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
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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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N2001/4038—Concentrating samples electric methods, e.g. electromigration, electrophoresis, ionisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention provides a kind of gas molecule enrichment method device, including device noumenon, and device noumenon includes ionization ionization source, air inlet guide ring, ionisation chamber, ioncollection memory, ion averager and outlet gas collecting apparatus；The invention further relates to a kind of gas molecule concentrated methods.The present invention is collected using selectivity ionization, ion persistent, ion instantaneously concentrates release to neutralize, and is realized and is improved the concentration of testing molecule in the sample gas of script low concentration, to realize the enrichment method to sample to be tested gas；Due to ionization, ioncollection, plasma diffusing W,Mo, ion is compound is all rapidly completed very much, the corresponding time in nanosecond and Microsecond grade, Sync enrichment, desorption time depend primarily on air velocity, far faster than traditional enrichment method.Present inventive concept is ingenious, and concentration effect control flexibly, promotes and applies convenient for gas detection.
Description
Technical field
The present invention relates to light concentration gas Molecular Detection sample pre-treatments field, in particular to a kind of gas molecule concentration is rich
Set method.
Background technique
Light concentration gas Molecular Detection is the pith of gas fining detection, is carrying out analysis detection to gaseous molecular
During, when the concentration of target test substance is lower, the detection limit of instrument is often not achieved in (the ppm even ppb order of magnitude),
It needs to carry out enrichment method processing to object gas, improves the square measurement that is available on the machine after concentration.Existing gas molecule enrichment method
The technical method of processing mainly has several major class such as solution absorption method, packed column detention method and condensation at low temperature, but the above method
It is respectively present following problems:
Under test gas is dissolved among solution or chemical reaction occurs under test gas and generates newly by solution absorption method
Substance is easily surveyed, i.e., converts liquid sample for gaseous sample, the disadvantage is that changing the form of substance, non-simple enrichment is dense
Contracting, it is difficult to which, suitable for the subsequent detection of the gaseous states sample introduction such as mass spectrum, ion mobility spectrometry, furthermore solution is that consumptive material is difficult to use in high frequency time
On-line monitoring.
Packed column detention method using particulate solid as filling preparation, by absorption, dissolution or chemical reaction occurs will be to
It surveys component detention and achievees the purpose that enrichment method on packing material, then make to be tested by the method for desorption or solvent elution
Component is released from packing material and is measured.This method is the main method of current gas enrichment concentration, is divided into absorption
Type, distribution type and 3 kinds of response type generally require to carry out heating and cold the disadvantage is that Adsorption and desorption speed is slow in the course of work
But it handles, and ingredient to be measured is easy to measure next time in packing material remaining influence.
Sample gas is flowed through the cold-trap lower than target substance to be tested fusing point or boiling point by condensation at low temperature, is passing through cold-trap
Target molecule, which is frozen, in the process is changed into liquid or solid matter stays in trap, is largely discharged outside trap in its molecule, one
By focusing on the release of after improving the gaseous material that the temperature of cold-trap allows target molecule to be changed into high concentration come with this after fixing time
To realize the enrichment method to target testing molecule.The disadvantages of the method are as follows enrichment method speed is slow, condensing unit volume is big, energy
Consumption is high, it is difficult to adapt to the on-line monitoring and field quick detection of high frequency time.
To sum up, that there are processing speeds is slow, energy consumption is high, easy residual, even changes object for existing enrichment method technology
The problems such as matter form.In view of this, it is really necessary to develop a kind of new-type gas molecule concentrated method, it is above-mentioned to solve
Problem.
Summary of the invention
For the shortcomings of the prior art, the object of the present invention is to provide a kind of gas molecule enrichment method sides
Method and device, using it is selective ionization, ion persistent collect, ion instantaneously concentrates release neutralize, realize will script it is low dense
The concentration of testing molecule improves in the sample gas of degree, to realize the enrichment method to sample to be tested gas.
In order to realize above-mentioned purpose according to the present invention and other advantages, a kind of gas molecule enrichment method side is provided
Method, comprising the following steps:
Ionization, selective ionization source is not in the case where destroying molecular structure by gas molecule electricity in sample to be tested gas
From gas ion is converted into, gas ion and carrier gas molecules form ionic molecule mixing group after ionization；
Molecular ion separation, for the ionic molecule mixing group when flowing through ioncollection memory, ion is by electric field force beam
It binds and remains in ioncollection memory, neutral carrier gas molecules are unaffected to be passed freely through from collector, in air-flow
Promotion, which is expelled directly out, to flow away；
Plasma diffusing W,Mo, when ioncollection completes that the constraint electric field strength of ioncollection memory is become zero or is changed on the contrary
Direction loses electric field constraint or falls off from ioncollection memory rapidly in the ion under reversed electric field power drive and concentrates release
Out, ion cloud is formed；
It electrically neutralizes, under air-flow promotion, ion cloud flows through ion averager and is converted to neutral gas molecule.
Preferably, having for ion is fettered by the constraint electric field internal electric field power of setting ioncollection memory in plasma diffusing W,Mo
Effect action time carrys out the enrichment method degree of regulating gas molecule.
Preferably, in plasma diffusing W,Mo by acquire ioncollection memory constraint electric field electric field intensity inside high determine whether from
Son, which is collected, to be completed, wherein initial electric field intensity is setting value, and the electric field strength of acquisition is state value, initial electric field intensity with adopt
The difference and amount of ions of the electric field strength of collection are positively correlated, and in the case where ioncollection memory inner volume is certain, judgement is
It is no to meet release concentration, if satisfied, being then determined as that ioncollection is completed.
A kind of gas molecule enrichment method device, including device noumenon, described device ontology include ionization ionization source, into
Gas guide ring, ionisation chamber, ioncollection memory, ion averager and outlet gas collecting apparatus；Wherein,
It includes sample that the ionization ionization source, which is used to form the indoor sample gas ionization to be detected of the ionization,
The gas ion of this gas and the ionic molecule mixing group of carrier gas molecules；
It is connected to inside the air inlet guide ring and the ionisation chamber；Sample gas to be detected passes through the air inlet guide ring
It imports in the ionisation chamber；
The ionisation chamber is used for for the sample gas ionization to be detected, and the ionisation chamber and the ioncollection store
Connection inside device, the ionic molecule mixing group flow to progress molecular ion separation in the ioncollection memory；
The ioncollection memory is used to collect the gas ion of sample gas, applies in the ioncollection memory
There is electric field, the gas ion of sample gas is stored in the ioncollection memory under electric field constraint, the load of sample gas
Gas molecule is not influenced by electric field across the ioncollection memory and the ion averager and from the outlet gas collecting apparatus
Export, ion are then stored on the dielectric of ioncollection memory under the constraint of electric field force；When ioncollection to one
Determine degree and the constraint electric field strength of ioncollection memory is become zero or be changed to opposite direction, loses electric field constraint or reversed
Ion under electric field power drive, which falls off from ioncollection memory rapidly, concentrates release；
The ion averager loses the ion of electric field force constraint rapidly from dielectric for neutralizing reduction gas ion
On flee from after ion averager be carried along by the carrier gas of sample gas be converted into uncharged neutral molecule, and from outlet
Gas collecting apparatus export.
Preferably, the ionization ionization source is ultraviolet photoionization ionization source, the ultraviolet photoionization ionization source packet
Include ultraviolet PID lamp, solenoid drive coil, radio-frequency driven power supply；The solenoid drive coil is wrapped in the ultraviolet PID lamp
With lamp；Described solenoid drive coil the two poles of the earth connect the radio-frequency driven power supply；The optical transmission window of the ultraviolet PID lamp and institute
State the connection of air inlet guide ring.
Preferably, the air inlet guide ring includes insulation ring body, air inlet pipe；Insulation ring body one end face, which is equipped with, to be run through
Channel, the connected pathways are used for through ionization light；The insulation ring body is also provided with air slot, one end face of air slot with
The end face of the ionisation chamber, which is formed, holds together port；The air inlet pipe is connected to the air slot；Sample gas from by air inlet pipe into
Enter air slot and is spilled over to the ionisation chamber from port is held together.
Preferably, the ionisation chamber includes ionized region, the ionized region be located at the ionization ionization source effective range it
It is interior；Sample gas reaches the ionized region by the air inlet guide ring；The ionized region and the ioncollection memory connect
It is logical.
Preferably, the ioncollection memory includes repulsion electrode, attracts electrode, insulation storage medium, contact conductor；
The repulsion electrode and the attraction electrode form parallel pole, and the repulsion electrode, the attraction electrode are separately connected described
Contact conductor generates electricity in the repulsion electrode and the grasping part region for attracting electrode after applying voltage on two electrodes
?；The insulation storage medium is coated on the outside of the attraction electrode, for storing the gas ion for attracting electrode side.
Preferably, the ion averager includes conductive mesh, conducting connecting part；The conducting connecting part and the ion are received
The conductive fixing frame for collecting memory is electrically connected；The conductive mesh forms equipotentiality body in parallel with the conducting connecting part, described to lead
Power grid is installed on the arrival end of the ion averager.
Preferably, the ion averager further includes conductive funnel, the conduction funnel and the conductive mesh, the conduction
Connector is in parallel；The conduction funnel is mounted on the ion averager outlet end.
Compared with prior art, the present invention the beneficial effect is that:
The present invention provides a kind of gas molecule enrichment method device, including device noumenon, and device noumenon includes ionization electricity
From source, air inlet guide ring, ionisation chamber, ioncollection memory, ion averager and outlet gas collecting apparatus；The present invention also relates to
And a kind of gas molecule concentrated method.The present invention is collected using selectivity ionization, ion persistent, ion is instantaneously concentrated
Release neutralizes, and realizes and improves the concentration of testing molecule in the sample gas of script low concentration, to realize to sample to be tested gas
The enrichment method of body；Due to ionization, ioncollection, plasma diffusing W,Mo, ion is compound is all rapidly completed very much, the corresponding time
In nanosecond and Microsecond grade, Sync enrichment, desorption time depend primarily on air velocity, far faster than traditional enrichment method.This hair
Bright to be skillfully constructed, concentration effect control flexibly, promotes and applies convenient for gas detection.
Detailed description of the invention
Fig. 1 is according to a kind of flow diagram of gas molecule concentrated method of the present invention；
Fig. 2 is according to a kind of three-dimensional sectional structural schematic diagram of gas molecule enrichment method device of the present invention；
Fig. 3 is according to a kind of three-dimensional sectional of the ionization ionization source of gas molecule enrichment method device of the present invention
Structural schematic diagram；
Fig. 4 is according to a kind of three-dimensional sectional knot of the air inlet guide ring of gas molecule enrichment method device of the present invention
Structure schematic diagram；
Fig. 5 is to be shown according to a kind of three-dimensional sectional structure of the ionisation chamber of gas molecule enrichment method device of the present invention
It is intended to；
Fig. 6 is to be cutd open according to a kind of three-dimensional of the ioncollection memory of gas molecule enrichment method device of the present invention
Depending on structural schematic diagram；
Fig. 7 is according to a kind of three-dimensional sectional knot of the ion averager of gas molecule enrichment method device of the present invention
Structure schematic diagram；
Fig. 8 is according to a kind of three-dimensional sectional of the outlet gas collecting apparatus of gas molecule enrichment method device of the present invention
Structural schematic diagram.
Figure label:
Device noumenon 100, ionization ionization source 30, air inlet guide ring 40, ionisation chamber 50, ioncollection memory 60, from
Sub- averager 70, outlet gas collecting apparatus 80, ultraviolet PID lamp 301, solenoid drive coil 302, radio-frequency driven power supply 303, light transmission
Window 304, air inlet pipe 402, connected pathways 403, the first detent step 404, air slot 405, holds together port at insulation ring body 401
406, the second detent step 407, ring-shaped step 501, ionized region 502, cylinder 503, repulsion electrode 601, attract electrode 602, absolutely
Edge storage medium 603, insulation fixed frame 604, conductive fixing frame 605, contact conductor 606, conductive mesh 701, conductive funnel 702,
Conducting ring 703, insulation ladle body 801, outlet gas-guide tube 802, hollow out cylinder 803, infundibulate vacancy 804, blind hole 805.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, foregoing end other objects of the invention, feature, side
Face and advantage will be apparent, and so that those skilled in the art can carry out according to the description.In the accompanying drawings,
For clarity, shape and size can be amplified, and will be indicated in all figures using identical appended drawing reference identical
Or similar component.In the following description, such as center, thickness, height, length, front, back, rear portion, the left side, the right, top
The words such as portion, bottom, top, lower part are to be based on the orientation or positional relationship shown in the drawings.Particularly, " height " is equivalent to from top
Portion is to the size of bottom, and " width " is equivalent to size from left to right, and " depth " is equivalent to vertical size.These
Relative terms are to be not intended to need specifically to be orientated for convenience and usually.It is related to the term of attachment, connection etc.
(for example, " connection " and " attachment ") refer to these structures by the relationship that intermediate structure is fixed directly or indirectly to one another or is attached,
And movable or rigidly attached or relationship, unless otherwise clearly stating.
Embodiment 1
Shown in referring to Fig.1, a kind of gas molecule concentrated method, comprising the following steps:
S1, ionization, selective ionization source will be low dense in sample to be tested gas in the case where not destroying molecular structure
Degree gas molecule ionization is converted into gas ion, and gas ion forms ionic molecule with the carrier gas molecules of high concentration and mixes after ionization
Group；
S2, molecular ion separation, for the ionic molecule mixing group when flowing through ioncollection memory, ion is by electric field force
It holds onto and remains in ioncollection memory, neutral carrier gas molecules are unaffected to be passed freely through from collector, in air-flow
Promotion be expelled directly out and flow away；
S3, plasma diffusing W,Mo, when ioncollection to a certain extent becomes zero the constraint electric field strength of ioncollection memory
Or it is changed to opposite direction, lose electric field constraint or is taken off from ioncollection memory rapidly in the ion under reversed electric field power drive
It falls to focus on the release of and, form the ion cloud of high concentration；
S4, it electrically neutralizes, under air-flow promotion, the ion cloud of high concentration flows through ion averager and is converted in high concentration
Property gas molecule.
But it should be recognized that the present embodiment is different from the enrichment mode of periodic swinging, the mode of periodic swinging is
Draw close ion in a manner of shaking back and forth to intermediate accumulation control, i.e., intermediate-ion concentration is higher than on side, ion when changing sample introduction
Spacial distribution density, such ion opposite can be improved by the percent of pass in enrichment hole, ion when only improving sample introduction
Utilization rate, it is difficult to increase substantially, i.e., enrichment times are low；And molecular conversion gets up for ion storage in this embodiment, pass through
Storage time is enriched with more gas ions, and then quick release comes out that neutralize be that molecule is transmitted to detecting instrument again, collects storage
The time the deposited multiple of longer enrichment is higher, exchanges the increase of the multiple of enriched concentration for by the accumulation of time, such as passes through receipts
Collection stores 10 minutes gas, then allows its parsing in 1 second to release, such enrichment times are 600 times.
Preferably, having for ion is fettered by the constraint electric field internal electric field power of setting ioncollection memory in plasma diffusing W,Mo
Effect action time carrys out the enrichment method degree of regulating gas molecule.In one embodiment, using additional periodical electric field or general
The constraint electric field zero setting of ioncollection memory is set instead, for example, within an electric field period, the effective acting time of positive electric field
It is 10 minutes, the effective acting time of zero electric field or reversed electric field is 1 second, then theoretical enrichment times make to be adsorbed on up to 600 times
Gas ion abrupt release in ioncollection memory, in this embodiment, without adding sensing detection device, it is only necessary to by setting
Set seasonal power.It should be appreciated that effective acting time is electric field action in the time of ion, rather than actual cycle power supply
Practical function time, generally, practical function time are greater than effective acting time.
Preferably, in plasma diffusing W,Mo by acquire ioncollection memory constraint electric field electric field intensity inside high determine whether from
Son, which is collected, to be completed, wherein initial electric field intensity is setting value, and the electric field strength of acquisition is state value, initial electric field intensity with adopt
The difference and amount of ions of the electric field strength of collection are positively correlated, and in the case where ioncollection memory inner volume is certain, judgement is
It is no to meet release concentration, if satisfied, being then determined as that ioncollection is completed.In one embodiment, it is detected by sensitive induction field
Electric field strength caused by the variation for the quantity of electric charge of gas ion that device acquisition is adsorbed in ioncollection memory changes, when reaching
When reaching release threshold value to the difference of initial electric field intensity and the electric field strength of acquisition, using extra electric field or by ioncollection
The constraint electric field zero setting of memory is set instead, makes the gas ion abrupt release being adsorbed in ioncollection memory, in this reality
Shi Zhong controls the quantity of electric charge of enrichment to control the concentration of enrichment to a certain extent.
Embodiment 2
A kind of gas molecule enrichment method device, as shown in Fig. 2, including device noumenon 100, described device ontology 100 is wrapped
Include ionization ionization source 30, air inlet guide ring 40, ionisation chamber 50, ioncollection memory 60, ion averager 70 and outlet
Gas collecting apparatus 80；Wherein,
The ionization ionization source 30 is used to the sample gas ionization to be detected in the ionisation chamber 50 forming packet
The ionic molecule mixing group of gas ion and high concentration carrier gas molecules containing sample gas；
It is connected to inside the air inlet guide ring 40 and the ionisation chamber 50；Sample gas to be detected is led by the air inlet
Stream ring 40 imports in the ionisation chamber 50；
The ionisation chamber 50 is used for for the sample gas ionization to be detected, the ionisation chamber 50 and the ioncollection
It is connected to inside memory 60, the ionic molecule mixing group, which flows to, carries out molecular ion point in the ioncollection memory 60
From；
The ioncollection memory 60 is used to collect the gas ion of sample gas, in the ioncollection memory 60
It is applied with electric field, the gas ion of sample gas is stored in the ioncollection memory 60 under electric field constraint, sample gas
The high concentration carrier gas molecules of body not by electric field influenced across the ioncollection memory 60 and the ion averager 70 and from
The outlet gas collecting apparatus 80 exports, and the insulation that ion is then stored in ioncollection memory 60 under the constraint of electric field force is situated between
In matter；When the constraint electric field strength of ioncollection memory is become zero or is changed to opposite direction to a certain extent by ioncollection,
It loses electric field constraint or falls off from ioncollection memory rapidly in the ion under reversed electric field power drive and concentrate release；
For neutralizing reduction gas ion, the ion for losing electric field force constraint is situated between from insulation rapidly the ion averager 70
Ion averager 70 is carried along by the carrier gas of sample gas after fleeing from matter and is converted into uncharged neutral molecule, and from
Outlet gas collecting apparatus 80 exports.
In the present embodiment, as shown in Fig. 2, sample gas flows to center from periphery via after the guiding of air inlet guide ring 40
Into ionisation chamber 50, ionizes the high energy UV that ionization source 30 issues and be irradiated to the sample gas in ionisation chamber 50 point along axial direction
On son, the relatively low molecule of ionization energy is ion by high-energy photon ionization, and the higher carrier gas molecules of ionization energy still keep not charged
Molecular state；Ionic molecule mixing group under the promotion of air-flow in ionisation chamber 50 is flowed to ioncollection memory 60, when
Control power supply applies after the voltage difference of certain orientation ion on ioncollection memory 60 and is strapped in memory by electric field
On the dielectric for attracting electrode extexine, neutral carrier gas molecules are unaffected to be passed through in ioncollection memory 60 and ion
With device 70, flow away from the initial stage gas-guide tube of outlet gas collecting apparatus 80；When needing to parse ion after enrichment method
When, control power supply applies backward voltage to the electrode plate of ioncollection memory 60 or is shorted the two, loses electric field force constraint
Ion be converted into uncharged from fleeing to get off to be rinsed carrier gas and be carried along into ion averager 70 on dielectric rapidly
Property molecule is finally flowed out from the outlet gas-guide tube of outlet gas collecting apparatus 80.
Embodiment 3
As shown in figure 3, the ionization ionization source 30 is ultraviolet photoionization ionization source, the ultraviolet photoionization ionization
Source includes ultraviolet PID lamp 301, solenoid drive coil 302, radio-frequency driven power supply 303；The solenoid drive coil 302 twines
It is wound on ultraviolet 301 lamp of PID lamp；Described 302 the two poles of the earth of solenoid drive coil connect the radio-frequency driven power supply 303；
The optical transmission window 304 of the ultraviolet PID lamp 301 is connect with the air inlet guide ring 40.
In this embodiment, as shown in figure 3, ultraviolet PID lamp 301 has the optical transmission window 304 that can penetrate high energy ultraviolet photon
(magnesium fluoride or lithium fluoride window), high energy ultraviolet photon can be emitted to the outside of lamp, the window end of ultraviolet PID lamp from the window
It is connected with air inlet guide ring 40.Radio-frequency driven power supply 303 generates radio frequency alternating current and is supplied to helix tube drive in the course of work
Moving winding 302, solenoid drive coil 302 by radio frequency alternating current be converted to induction field be ultraviolet PID lamp 301 provide it is sharp
Energy is sent out, the low density gas molecular discharge inside induction field exciter lamp generates high energy UV and is emitted from optical transmission window 304
Air inlet guide ring 40 is passed through afterwards to be irradiated in ionisation chamber 50.
It should be noted that ultraviolet photoionization ionization source is a kind of selective ionization source, using high energy UV to gas
State molecule is ionized.Use PID lamp for argon lamp in the present embodiment, most short line wavelength be 104.8nm, it is corresponding can
The energy for measuring photon is 11.8eV, can convert ionic state for gas molecule of the ionization energy within 11.8eV, ionization energy compared with
If high carrier gas molecules (if the ionization energy of the main ingredient nitrogen of air and oxygen is respectively 14.53eV and 13.62eV) not by
Influence continues to keep neutral molecule state；Simultaneously because the energy of used high energy ultraviolet photon is in 11.8eV hereinafter, to dividing
Minor structure does not have destruction.
Embodiment 4
As shown in figure 4, the air inlet guide ring 40 includes insulation ring body 401, air inlet pipe 402；The insulation ring body 401 1
End face is equipped with connected pathways 403, and the connected pathways 403 is used for through ionization light；The insulation ring body 401, which is also provided with, to be led
The end face of air drain 405,405 1 end face of air slot and the ionisation chamber 50, which is formed, holds together port 406；The air inlet pipe 402 with
The air slot 405 is connected to；Sample gas from by air inlet pipe 402 enter air slot 405 and from hold together port 406 be spilled over to it is described
Ionisation chamber 50.
In this embodiment, as shown in figure 4, air inlet guide ring 40 be located at ultraviolet photoionization ionization source 30 and ionisation chamber 50 it
Between, the axis of insulation ring body 401 has the cylindrical connected pathways 403 of a large area to be used for through high energy UV, through logical
The diameter in road 403 and the exit diameter of high energy UV are suitable.The edge of connected pathways 403 is equipped with one first detent step 404
Photon exit end for the ultraviolet PID lamp 301 of connection and sealing.The ring body 401 that insulate is equipped with the air slot 405 of an annular, ring
The lower end surface of the air slot of shape and the upper surface of ionisation chamber 50 fit together to be formed a circle it is narrow hold together port 406, air inlet pipe
402 one end is connected with the air slot 405 of annular, and sample gas is entered by air inlet pipe 402 after the air slot 405 of annular
It is first flowed along relatively broad groove body, full of overflowing trickling going out to ultraviolet PID lamp 301 from holding together port 406 after air slot
It penetrates in front of window, then flows to ionisation chamber 50.The lower end periphery of insulation ring body 401 is equipped with another second detent step 407 and is used for
Connection with ionisation chamber 50 positions.
After 405 water conservancy diversion of air slot through annular, sample gas is from around equably being imported into ultraviolet PID lamp 301
The front of optical transmission window 304, compared with introducing from ultraviolet 301 window side of PID lamp, the present embodiment keeps sample gas distribution more equal
It is even, it can farthest improve ionizing efficiency.
Embodiment 5
As shown in figure 5, the ionisation chamber 50 includes ionized region 502, the ionized region 502 is located at the ionization ionization source
Within 30 effective ranges；Sample gas reaches the ionized region 502 by the air inlet guide ring 40；The ionized region 502 with
The ioncollection memory 60 is connected to.
In this embodiment, ionisation chamber 50 is stable by chemical property, insulation performance is good, it is corrosion-resistant, do not absorb or be dissolved with
The inert material of machine object molecule is made.In conjunction with shown in Fig. 4, Fig. 5, there is the ring-shaped step of a sinking in the upper end of ionisation chamber 50
501 with air inlet guide ring 40 for being connected, the air guide of the annular of the sinking step surface and air inlet guide ring 40 of ring-shaped step 501
Slot 405 is formed together port 406；50 intermediate cylindrical cavity of ionisation chamber is ionized region 502, which is located at high energy ultraviolet photon
Effective range within, selectively ionized from the trickle gas molecule that comes of air inlet guide ring 40 in the region, ionization energy is low
Gas molecule be converted into the ion of electrification herein, the high carrier gas molecules of ionization energy are unaffected still to keep neutral molecule state,
Become " ionic molecule mixing group " in the region samples gas；The lower end of ionisation chamber 50 has an interior diameter to be greater than ionized region 502
Cylinder 503 functions simultaneously as the protective shell of ioncollection memory 60 for installing ioncollection memory 60.
Embodiment 6
As shown in fig. 6, the ioncollection memory 60 includes repulsion electrode 601, electrode 602, insulation storage is attracted to be situated between
Matter 603, contact conductor 606；The repulsion electrode 601 forms parallel pole, the repulsion electrode with the attraction electrode 602
601, the attraction electrode 602 is separately connected the contact conductor 606, in the repulsion electrode after application voltage on two electrodes
601 with it is described attract electrode 602 grasping part region in generation electric field；The insulation storage medium 603 is coated on the suction
Draw 602 outside of electrode, for storing the gas ion for attracting 602 side of electrode.
In this embodiment, as shown in fig. 6, including repulsion electrode 601, attracting electrode 602, insulation storage medium 603, insulation
Fixed frame 604, conductive fixing frame 605 and contact conductor 606.Repulsion electrode 601 and attraction electrode 602 form parallel surfaces
Electrode plate applies on two electrode plates in the area of space after voltage therebetween and generates electric field, by the ion of electric field region
Assemble under the action of electric field force far from repulsion electrode to attraction electrode；When target testing molecule selected type ionization source ionization for
When cation, that is, the voltage applied on repulsion electrode 601 when the ion to be collected is cation, which is higher than, attracts electrode 602, on the contrary
The voltage then applied on repulsion electrode 601 is lower than attraction electrode 602.It should be appreciated that repulsion electrode 601 and attraction electrode 602
Number is not limited solely to 1, is also possible to multiple.
Insulation storage medium 603 is stable by chemical property, insulation performance is good, it is corrosion-resistant, do not absorb or dissolved organic matter
The inert material of molecule is made, it is fitted tightly over the two sides for attracting electrode 602, will attract electrode sealing inside it,
It avoids that electrode 602 is attracted to contact with ambient atmos and neutralize ion；It is pushed away when charged ion rushes at 602 under the action of electric field force
When denounceing electrode, finally beats on the outer surface in insulation storage medium 603, be strapped on the outer surface of dielectric and deposit by electric field force
Storage is got up；The charged ion of insulation 603 outer surface of storage medium is stored in simultaneously in repulsion electrode 601 and attraction electrode 602
Between area of space in generate reversed electric field；In one embodiment, with the reversed electric field for increasing generation of ion storage by
It is cumulative big, two after reversed electric field is equal with repulsion electrode 601 and the positive field for attracting the voltage difference on electrode 602 to generate
Electric field force between electrode is cancelled completely, and no longer stores new ion on 603 outer surface of storage medium of hereafter insulating, therefore
The amount of ions that 603 outer surface of storage medium stores that insulate depends on the size of former positive field, that is, depends on being applied to repulsion
Electrode 601 and the size for attracting the voltage difference on electrode 602.
As shown in fig. 6, insulation fixed frame 604 and conductive fixing frame 605 are polycyclic fan-shaped engraved structure, it is solid for installing
Fixed electrode, the position of counter electrode are equipped with annular groove and are used to carry out detent to electrode.Insulation fixed frame 604 is deposited positioned at ioncollection
The arrival end of reservoir 60, gas ion molecular mixing group pass through in multiple large area sector hollow out positions entrance of insulation fixed frame
Portion electric field region since it is not charged for insulator, therefore does not have an impact the ion passed by.Conductive fixing frame 605 is located at ion
The outlet end of trapping memory, gas ion or molecule are left interior by multiple large area sector hollow out positions of conductive fixing frame
Portion electric field region；Conductive fixing frame 605 is also electrically connected repulsion electrode 601 in addition to playing fixed function, i.e., pushes away multiple
Reprimand electrode 601 is electrically being connected in parallel；Since conductive fixing frame 605 is connected with repulsion electrode 601, ioncollection is being carried out
When to ion have repulsive interaction, can will be filled in ioncollection storage, between electrode effective electric field decrease when
Time prevents the biggish ion flight of mass-to-charge ratio, and then improves ion collection efficiency.
Contact conductor 606 electrically draws repulsion electrode 601 and attraction electrode 602, is connected with control power supply, controls
Power supply can apply different voltage to electrode by contact conductor 606.Power supply is controlled when needing to collect ion storage to push away
Apply voltage difference on reprimand electrode 601 and attraction electrode 602, the voltage applied on repulsion electrode 601 when collecting cation, which is higher than, to be inhaled
Draw electrode 602, the voltage applied on repulsion electrode 601 when collecting anion applies voltage latter two electricity lower than electrode 602 is attracted
Area of space between pole generates electric field, and ion is bound storage to the outer of insulation storage medium 603 under the action of electric field force
On surface.When enrichment method, which finishes, to be needed to desorb ion, control power supply is in repulsion electrode 601 and attracts electrode 602
It is upper to apply opposite voltage difference or two class electrodes short circuit is made into applied voltage difference zero, due to having phase between the ion of like charges
Mutually repel, ion is escaped from the outer surface of insulation storage medium 603 rapidly after losing extra electric field constraint or applying reversed electric field
It is struck from, a part of ion and is neutralized to uncharged neutrality after absorbing opposite charge on conductive former repulsion electrode 601
Molecule is then rinsed carrier gas together with the ion not being neutralized and carries inflow ion averager 70.
Embodiment 7
As shown in fig. 7, the ion averager 70 includes conductive mesh 701, conducting connecting part；The conducting connecting part and institute
The conductive fixing frame 605 for stating ioncollection memory 60 is electrically connected；The conductive mesh 701 is formed simultaneously with the conducting connecting part
Join equipotentiality body, the conductive mesh 701 is installed on the arrival end of the ion averager 70.
In this embodiment, as shown in fig. 7, ion averager 70 include the conductive mesh 701 of annular, conductive funnel 702 and
Conducting connecting part, specifically, conducting connecting part are conducting ring 703, and three is made by corrosion resistant conductive material, in electricity
An equipotentiality body in parallel is formed on gas, wherein conducting ring 703 consolidates ion averager and the conduction of ioncollection memory 60
Determine frame 605 to be electrically connected.The conductive mesh 701 of annular is in the arrival end of ion averager, is main average mechanism, is solving
It is capable of providing the charge opposite with ion during suction, there is certain attraction to ion, from ioncollection memory 60
The upper ion not being neutralized released that desorbs absorbs quilt after the charges of different polarity during passing through conductive mesh from conductive mesh 701
Neutralizing becomes neutral molecule.Conductive funnel 702 is supplement average mechanism, while having the function of gas collection；When air velocity compared with
When fast, a small number of mass-to-charge ratioes are larger, the ion neutralized that fails to touch net in time enter after funnel be in contact with the conductive wall of funnel after quilt
Neutralizing is neutral molecule, it is ensured that all ions can be neutralized to uncharged neutral molecule.Ion is neutralized to not charged
Neutral molecule after, collapsed to conductive 702 bottom of funnel, from hopper base under the promotion of air-flow together with rinsing carrier gas instrument
The venthole in portion flows out ion averager 70.
Embodiment 8
As shown in figure 8, outlet gas collecting apparatus 80 includes stepped insulation ladle body 801, outlet gas-guide tube 802, ladle body by
Chemical property is stable, insulation performance is good, it is corrosion-resistant, do not absorb or the inert material of dissolved organic matter molecule is made.Bucket
The biggish hollow out cylinder 803 in body is for docking ionisation chamber 50, and the infundibulate vacancy 804 of middle and lower part is for accommodating ion neutralization
Device 70, the gas outlet of the 805 face ion averager 70 of blind hole of bottom, the bottom end of blind hole 805 have a duct for leading to side wall to connect
Pick out conductance tracheae 802.The main function of outlet gas collecting apparatus is protection and fixed ion averager, that is, serves as ion averager
70 protective shell.
The present invention provides a kind of gas molecule enrichment method device, including device noumenon, and device noumenon includes ionization electricity
From source, air inlet guide ring, ionisation chamber, ioncollection memory, ion averager and outlet gas collecting apparatus；The present invention also relates to
And a kind of gas molecule concentrated method.The present invention is collected using selectivity ionization, ion persistent, ion is instantaneously concentrated
Release neutralizes, and realizes and improves the concentration of testing molecule in the sample gas of script low concentration, to realize to sample to be tested gas
The enrichment method of body；Due to ionization, ioncollection, plasma diffusing W,Mo, ion is compound is all rapidly completed very much, the corresponding time
In nanosecond and Microsecond grade, Sync enrichment, desorption time depend primarily on air velocity, far faster than traditional enrichment method.This hair
Bright to be skillfully constructed, concentration effect control flexibly, promotes and applies convenient for gas detection.
Number of devices and treatment scale described herein are for simplifying explanation of the invention.To application of the invention,
Modifications and variations will be readily apparent to persons skilled in the art.
Although the embodiments of the present invention have been disclosed as above, but it is not limited in listed fortune in specification and embodiments
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily real
Now other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is not limited to
Specific details and legend shown and described herein.
Claims (10)
1. a kind of gas molecule concentrated method, which comprises the following steps:
Ionization, selective ionization source turn gas molecule ionization in sample to be tested gas in the case where not destroying molecular structure
Gas ion is turned to, gas ion and carrier gas molecules form ionic molecule mixing group after ionization；
Molecular ion separation, when flowing through ioncollection memory, ion is held onto the ionic molecule mixing group by electric field force
It remains in ioncollection memory, neutral carrier gas molecules are unaffected to be passed freely through from collector, in the promotion of air-flow
It is expelled directly out and flows away；
Plasma diffusing W,Mo, when ioncollection is completed to become zero or be changed to phase negative side for the constraint electric field strength of ioncollection memory
To losing electric field constraint or fall off rapidly and focus on the release of from ioncollection memory in the ion under reversed electric field power drive
Come, forms ion cloud；
It electrically neutralizes, under air-flow promotion, ion cloud flows through ion averager and is converted to neutral gas molecule.
2. a kind of gas molecule concentrated method as described in claim 1, it is characterised in that: pass through setting in plasma diffusing W,Mo
The concentration that the effective acting time of the constraint electric field internal electric field power constraint ion of ioncollection memory carrys out regulating gas molecule is rich
Collection degree.
3. a kind of gas molecule concentrated method as described in claim 1, it is characterised in that: pass through acquisition in plasma diffusing W,Mo
The constraint electric field electric field intensity inside high of ioncollection memory determines whether that ioncollection is completed, wherein initial electric field intensity is to set
Definite value, the electric field strength of acquisition are state value, the difference and amount of ions positive of the electric field strength of initial electric field intensity and acquisition
Close, in the case where ioncollection memory inner volume is certain, judge whether to meet release concentration, if satisfied, be then determined as from
Son, which is collected, to be completed.
4. a kind of gas molecule enrichment method device, including device noumenon (100), it is characterised in that: described device ontology (100)
Including ionizing ionization source (30), air inlet guide ring (40), ionisation chamber (50), ioncollection memory (60), ion averager
(70) and outlet gas collecting apparatus (80)；Wherein,
Ionization ionization source (30) is used to the sample gas ionization to be detected in the ionisation chamber (50) forming packet
The ionic molecule mixing group of gas ion and carrier gas molecules containing sample gas；
It is connected to inside the air inlet guide ring (40) and the ionisation chamber (50)；Sample gas to be detected is led by the air inlet
Ring (40) are flowed to import in the ionisation chamber (50)；
The ionisation chamber (50) is used for for the sample gas ionization to be detected, the ionisation chamber (50) and the ioncollection
Connection inside memory (60), the ionic molecule mixing group flow in the ioncollection memory (60) carry out molecule from
Son separation；
The ioncollection memory (60) is used to collect the gas ion of sample gas, and the ioncollection memory (60) is interior
It is applied with electric field, the gas ion of sample gas is stored in the ioncollection memory (60) under electric field constraint, sample
Gas carrier molecule is not influenced by electric field across the ioncollection memory (60) and the ion averager (70) and from institute
Outlet gas collecting apparatus (80) export is stated, ion is then stored in the insulation of ioncollection memory (60) under the constraint of electric field force
On medium；When the constraint electric field strength of ioncollection memory is become zero or be changed to phase negative side to a certain extent by ioncollection
To, lose electric field constraint or the ion under reversed electric field power drive rapidly fall off from ioncollection memory concentration release；
The ion averager (70) loses the ion of electric field force constraint rapidly from dielectric for neutralizing reduction gas ion
On flee from after ion averager (70) be carried along by the carrier gas of sample gas be converted into uncharged neutral molecule, and from
Outlet gas collecting apparatus (80) export.
5. a kind of gas molecule enrichment method device as claimed in claim 4, which is characterized in that the ionization ionization source
It (30) is ultraviolet photoionization ionization source, the ultraviolet photoionization ionization source includes ultraviolet PID lamp (301), helix tube driving
Coil (302), radio-frequency driven power supply (303)；The solenoid drive coil (302) is wrapped in ultraviolet PID lamp (301) lamp
With；Described solenoid drive coil (302) the two poles of the earth connect the radio-frequency driven power supply (303)；The ultraviolet PID lamp (301)
Optical transmission window (304) connect with the air inlet guide ring (40).
6. a kind of gas molecule enrichment method device as claimed in claim 4, it is characterised in that: the air inlet guide ring (40)
Including ring body (401), air inlet pipe (402) of insulating；(401) one end face of insulation ring body is equipped with connected pathways (403), described
Connected pathways (403) is used for through ionization light；The insulation ring body (401) is also provided with air slot (405), the air slot
The end face of (405) one end faces and the ionisation chamber (50), which is formed, holds together port (406)；The air inlet pipe (402) and the air slot
(405) it is connected to；Sample gas into air slot (405) and is spilled over to the electricity from port (406) is held together from by air inlet pipe (402)
From room (50).
7. a kind of gas molecule enrichment method device as claimed in claim 4, it is characterised in that: the ionisation chamber (50) includes
Ionized region (502), the ionized region (502) are located within ionization ionization source (30) effective range；Sample gas passes through
The air inlet guide ring (40) reaches the ionized region (502)；The ionized region (502) and the ioncollection memory (60)
Connection.
8. a kind of gas molecule enrichment method device as claimed in claim 4, it is characterised in that: the ioncollection memory
(60) include repulsion electrode (601), attract electrode (602), insulation storage medium (603), contact conductor (606)；The repulsion
Electrode (601) and the attraction electrode (602) form parallel pole, the repulsion electrode (601), the attraction electrode (602)
It is separately connected the contact conductor (606), in the repulsion electrode (601) and the attraction electrode after application voltage on two electrodes
(602) electric field is generated in grasping part region；The insulation storage medium (603) is coated on the attraction electrode (602) outside
Side, for storing the gas ion for attracting electrode (602) side.
9. such as a kind of described in any item gas molecule enrichment method devices of claim 4-8, it is characterised in that: in the ion
It include conductive mesh (701), conducting connecting part with device (70)；The conducting connecting part is led with ioncollection memory (60)
Electric fixed frame (605) is electrically connected；The conductive mesh (701) forms equipotentiality body in parallel, the conduction with the conducting connecting part
Net (701) is installed on the arrival end of the ion averager (70).
10. a kind of gas molecule enrichment method device as claimed in claim 9, it is characterised in that: the ion averager
It (70) further include conductive funnel (702), the conduction funnel (702) and the conductive mesh (701), the conducting connecting part are simultaneously
Connection；The conduction funnel (702) is mounted on the ion averager (70) outlet end.
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