CN205595303U - A transmission device for transmitting proton transfer reaction ion source intermediate ion - Google Patents
A transmission device for transmitting proton transfer reaction ion source intermediate ion Download PDFInfo
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- CN205595303U CN205595303U CN201620224044.7U CN201620224044U CN205595303U CN 205595303 U CN205595303 U CN 205595303U CN 201620224044 U CN201620224044 U CN 201620224044U CN 205595303 U CN205595303 U CN 205595303U
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Abstract
The utility model relates to a transmission device for transmitting proton transfer reaction ion source intermediate ion, including cyclic annular transmission focusing electrode, introduction electrode and the extraction electrode of coaxial setting, ring -type transmission focusing electrode is located to be introduced between electrode and the extraction electrode, introduces the electrode center and is provided with ion introduction mouth, and the extraction electrode center is provided with the ion outlet, there is an ion focusing transmission path of funnel type at cyclic annular transmission focusing electrode center, and the ion focusing transmission path end is towards the ion outlet, and the ion is introduced mouth, ion transmission path, ion outlet and is linked together, is provided with the efflux blocking electrode in the ion transmission path. The utility model discloses the ion utilization efficiency of proton transfer reaction mass spectrum ion source can be improved, the not enough problem of current ion transport method transmission efficiency is compensatied, the sensitivity that finally improves proton transfer reaction mass spectrograph.
Description
Technical field
This utility model and Proton transfer reaction mass spectrometry field, particularly relate to a kind of for transmitting matter
The transmitting device of sub-transfer reaction ion source.
Background technology
Volatile organic matter (Volatile Organic Compounds, VOCs) be air,
Major pollutants in water and soil earth environment, long-time absorption has carcinogenic, teratogenesis, mutagenesis
Danger.Additionally, volatile organic matter in air also can be participated in photochemical reaction thus cause gas
The severe change waited, such as photochemical fog, Organic aerosol, the appearance of greenhouse effect.It addition,
Food also contains substantial amounts of volatile organic matter, by analyzing the volatile matter of food, Ke Yijian
The composition of control food and quality, it is ensured that food safety.Volatile organic matter or characteristics of contaminated respiratory droplets gas
Important component in body, they usually have close relationship with some disease.Therefore by dividing
Volatile organic matter in analysis exhaled gas, it will be appreciated that the metabolic processes of human body, it is achieved
Early diagnosis to disease.At present, the main mass spectrum means of detection volatile organic matter are gas phases
Combined gas chromatography mass spectrometry (Gas Chromatography-Mass Spectrometry, GC-MS)
Method.This technology plays an important role in terms of measuring volatile organic trace compounds always.
But, GC-MS relates to chromatographic separation technology and the collection of sample, concentration extraction, causes
Measure time-consuming laborious again, and be unsuitable for scene, on-line analysis；Additionally, this multiple techniques
The electron impact ionization source used is a kind of hard ionization technique, not only can form different kinds of ions broken
Sheet so that mass spectrum is complicated, it is big to analyze difficulty, but also can be by the conventional constituents in air
N2, O2, CO2 and Ar equimolecular ionizes, and disturbs the real-time of small-molecular-weight volatile organic matter
Detection.
Utility model content
For the urgent needs to volatile organic matter Rapid Implementation monitoring means, and the most not
Having the analysis means matched, the plan development of this project is a kind of has what high sensitivity was quickly measured
Mass spectrograph, quick for volatile organic matter detects analysis in real time.Proton transfer reaction mass spectrometry
(Proton Transfer Reaction Mass Spectrometry, PTR-MS) technology is
A kind of chemical ionization source mass-spectrometric technique based on Proton-Transfer Reactions, its ultimate principle is first with each
Plant ionization means by water vapour molecule ionizing, generation reaction reagent IONS OF H 3O+, reaction examination
Agent ion reacts with sample molecule collision and makes sample ionization again, thus carries out mass spectrum inspection
Survey.The H3O+ of high concentration and analyte generation Proton-Transfer Reactions, be favorably improved sample
The Ionization Efficiency of molecule, has higher detection sensitivity from making instrument.Soft ionization techniques
Make PTR-MS directly detect volatile organic matter to be disturbed by air background.PTR-MS has
Have quickly analyze, feature that absolute magnitude is measured so that it is having gas chromatography combined with mass spectrometry can not
The advantage of analogy.In order to improve the performance of Proton transfer reaction mass spectrometry system, occur in that all at present
Such as glow discharge, hollow cathode discharge, microwave plasma, radio-frequency discharge and radioactive source etc.
Multiple Proton transfer reaction mass spectrometry ion source.The sensitivity of Proton transfer reaction mass spectrometry instrument to be improved,
One crucial problem be exactly improve in all kinds of Proton transfer reaction mass spectrometry instrument ion source from
Sub-utilization ratio, that is, improve ion transmission system ion transmission efficiency and to all kinds of from
The compatibility of component, this is also original intention of the present utility model.
For solving above-mentioned technical problem, this utility model purpose is to turn for various forms of protons
Move provide between reaction mass ion source and all types of mass spectrum mass analyzer a kind of efficiently from
Son transmission and focusing arrangement, to improve Proton transfer reaction mass spectrometry ionogenic ion utilization ratio,
Make up the problem that existing ion transmission method efficiency of transmission is not enough, finally improve Proton-Transfer Reactions
Mass spectrometric sensitivity.
For reaching above-mentioned purpose, the technical scheme that this utility model is taked is as follows:
A kind of transmitting device for transmitting Proton-Transfer Reactions ion source, including coaxial
Ring-type transmission focusing electrode, introducing electrode and the extraction electrode arranged, described ring-type transmission focuses on
Electrode is introducing between electrode and extraction electrode, and described introducing electrode centers is provided with ion and draws
Entrance, extraction electrode is provided centrally with Ion Extraction mouth；Described ring-type transmission focusing electrode center
Having the ion focusing transmission channel of funnel type, ion focusing transmission channel end is towards Ion Extraction
Mouthful, described ion intake, ion transmission channel, Ion Extraction mouth are connected, described ion
Jet blocking electrode it is provided with in transmission channel.
Further, transmitting device also includes vacuum cavity, described ring-type transmission focusing electrode,
Introducing electrode and extraction electrode is located at inside vacuum cavity, described introducing electrode is located at vacuum cavity
Front end, extraction electrode is located at vacuum cavity rear end, vacuum cavity front and back ends be equipped with through its
Internal opening, described opening is the most right with ion focusing transmission channel, vacuum cavity and ring-type biography
Defeated focusing electrode, introducing electrode, insulated electro isolation between jet blocking electrode and extraction electrode,
Described vacuum cavity sidewall is provided with vacuum pumping opening.
Preferably, described ring-type transmission focusing electrode uses multiple pole piece ring coaxial spaced to arrange
Structure, electric insulation between adjacent two pole piece rings, the internal diameter of pole piece ring from ion intake to from
Sub-outlet is sequentially reduced thus is centrally formed the ion of funnel type at ring-type transmission focusing electrode
Focus on transmission channel.
Further, the generally circular in shape ring-type or square ring of described pole piece ring
Further, the internal diameter of pole piece ring is 0.1mm～200mm, and pole piece ring thickness is 0.1
Mm～10mm, the distance between adjacent two pole piece rings is 0.1mm～20mm.
Further, adjacent two pole piece rings being applied with phase contrast is 170 °～190 °
Sine or cosine radio frequency low-voltage, the absolute value of described radio frequency low-voltage is less than 500V, frequency
100k Hz～10M Hz.
Preferably, jet blocking electrode is located on the axis of ion transmission channel.
Further, jet blocking electrode is discoideus, and jet blocking electrode is away from ion focusing
Transmission channel end.
Further, described jet blocking electrode is arranged on ion focusing transmission channel front end very
Three at.
Further, described jet blocking electrode is applied with DC voltage and/or the low electricity of radio frequency
Pressure, described DC voltage, the absolute value of radio frequency low-voltage are less than 500V.
Further, being provided with insulation dottle pin between adjacent two pole piece rings, described pole piece ring is with exhausted
Edge dottle pin outer is run through to have and is easy to fixed pole loop and installs the fixing of ring-type transmission focusing electrode
Screw rod.
Compared with prior art, this utility model has the advantages that
1. due to described in the utility model for the ionogenic ion of Proton transfer reaction mass spectrometry
Transmitting device is through special radio-frequency voltage amplitude, frequency and the phase of multi-disc ring electrode shape
Coupling mutually, can be expeditiously under the air pressure of drift tube rear end 100Pa-0.1Pa, greatly
Area captures and focuses on the little mass ion of transmission mass-to-charge ratio less than 500, the most targetedly
Improve the ion transmission efficiency of Proton transfer reaction mass spectrometry instrument especially, and then improve the sensitive of system
Degree.
2. this utility model device is being provided centrally with jet blocking electrode especially, can be at base
This stops in the case of not affecting ion transmission efficiency by ion source entrance ion transport device
Neutral molecule air-flow, improves the vacuum of transmission system rear class, is finally reached reduction rear class mass spectrum
The background noise of mass analyzer, improves signal to noise ratio, improves system sensitivity further.
3. to have compatible all types of Proton transfer reaction mass spectrometry ionogenic for this utility model device
Characteristic, includes but are not limited to based on microwave plasma, dielectric barrier discharge, DC glow
Electric discharge, hollow cathode discharge, radio-frequency discharge, the Proton transfer reaction mass spectrometry ion source of radioactive source.
And can be by these ionogenic ion high efficiency of transmission to including but are not limited to level Four bar, flying
All kinds of mass of ion analyzers such as row time, ion trap.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the structural representation of embodiment 2；
Fig. 3 is the structural representation of embodiment 3；
In figure: 1-vacuum cavity, 2-vacuum pumping opening, 3-ring-type transmission focusing electrode, 4-
Radio-frequency power supply, 5-introducing electrode, 6-jet blocking electrode, 7-extraction electrode, 8-ion source connect
Mouth, 9-mass analyzer interface, 10-fix bolt, 11-insulator cap, 12-standing screw,
13 insulation dottle pins.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below tie
This utility model is described in further detail by the embodiment that conjunction accompanying drawing and utility model people are given.
Embodiment 1
As it is shown in figure 1, the present embodiment is disclosed for transmitting Proton-Transfer Reactions ion source
Transmitting device, including the ring-type transmission focusing electrode 3 being coaxially disposed, introduces electrode 5 and draws
Electrode 7, ring-type transmission focusing electrode 3 is introducing between electrode 5 and extraction electrode 7, is drawing
Entering electrode 5 and be provided centrally with ion intake, extraction electrode 7 is provided centrally with Ion Extraction mouth；
There is the ion focusing transmission channel of funnel type at ring-type transmission focusing electrode 3 center, and ion focusing passes
Defeated channel end is towards Ion Extraction mouth, ion intake, ion transmission channel, Ion Extraction
Mouth is connected, and is provided with jet blocking electrode 6 in ion transmission channel.Anti-from proton translocation
The ion answering mass ion source is introduced into ion focusing transmission channel by ion intake to be carried out
The transmission of ion beam and focusing.Focus on later ion beam by transmitting device tail end extraction electrode
Ion Extraction mouth on 7 is drawn.Owing to draught head injects the neutral gas of transmitting device from ion source
Body molecule jet is suppressed by jet blocking electrode 6, prevents gas jet to be directly entered transmission dress
Put the Ion Extraction mouth of tail end.
Preferably, ring-type transmission focusing electrode 3 uses the knot that multiple pole piece ring coaxial spaced is arranged
Structure, is realized electric insulation, the internal diameter of pole piece ring by any dielectric mode between adjacent two pole piece rings
It is sequentially reduced thus ring-type transmission focusing electrode 3 from ion intake to Ion Extraction mouth
It is formed centrally the ion focusing transmission channel of funnel type.The internal diameter of pole piece ring is sequentially reduced from front to back
The purpose installed is so that ion can more preferable restrained focusing.Further, the shape of pole piece ring
Shape is circular annular form or square ring, and pole piece ring can be by any conduction or surface conductance material system
Making, the internal diameter of pole piece ring is 0.1mm～200mm, and pole piece ring thickness is 0.1mm～10mm,
Distance between adjacent two pole piece rings is 0.1mm～20mm.Conduction or surface is used to lead
The purpose of electric material is to provide direct current and alternation electricity effectively for pole piece ring center openwork part
?；Using the purpose of circle or square configuration is to make the Electric Field Distribution in the hollow out of pole piece ring center
Symmetrically and evenly.The purpose limiting installing space is to be ion to coordinate direct current and alternating electric field
The biggest transmission channel is provided.
Further, adjacent two pole piece rings are applied with phase contrast be 180 ° ± 10 ° just
String or cosine radio frequency low-voltage 4, the absolute value of described radio frequency low-voltage 4 is less than 500V, frequency
100k Hz～10M Hz.Anti-phase sine or the purpose of cosinusoidal voltage is applied at consecutive roots loop
Centered by being, the ion in transmission channel provides constraint voltage, it is to avoid ion runs on electrode,
And coordinate ring-type transmission focusing electrode 3 by ion focusing at ion focusing transmission channel center.
Preferably, jet blocking electrode 6 is located on the axis of ion transmission channel, further,
The area of the area ratio Ion Extraction mouth of jet blocking electrode 6 is big.Jet blocking electrode 6 is permissible
The optional position being arranged on axis, jet blocking electrode 6 can be tabular can also be any
Shape, jet blocking electrode 6 can arrange one or more.Jet blocking electrode 6 can hinder
The gear ionogenic gas jet of prime is directly entered the Ion Extraction mouth of transmitting device tail end, reduces
The neutral gas molecule of Ion Extraction mouth output, improves rear class vacuum, reduces system noise,
Improve the signal to noise ratio of mass spectrometer system.Jet blocking electrode 6 is applied with DC voltage and/or
Radio frequency low-voltage so that jet blocking electrode 6 can be arranged while stopping neutral gas molecule
Scold ion collision electrode, ensure the transmitting device efficiency of transmission to ion to greatest extent.Unidirectional current
The absolute value of pressure and radio frequency low-voltage is less than 500V.
Further, the shell of transmitting device is a vacuum cavity 1, and ring-type transmission focuses on electricity
It is internal that pole 3, introducing electrode 5 and extraction electrode 7 are located at vacuum cavity 1, introduces electrode 5 and sets
In vacuum cavity 1 front end, extraction electrode 7 is located at vacuum cavity 1 rear end, before vacuum cavity 1,
Rear end is equipped with its internal opening through, and opening is the most right with ion focusing transmission channel, vacuum
The opening of cavity 1 front end should be bigger than ion intake；Should be bigger than Ion Extraction mouth after the opening of rear end,
Vacuum cavity 1 and ring-type transmission focusing electrode 3, introduce electrode 5, jet blocking electrode 6 with
And insulated electro isolation between extraction electrode 7, vacuum cavity 1 sidewall is provided with vacuum pumping opening 2.
Vacuum cavity 1 rustless steel or aluminium alloy system.Needed for vacuum cavity 1 provides for transmitting device
Closed environment, maintains vacuum by the mechanical pump being connected in vacuum pumping opening 2 or molecular pump；
Certainly transmitting device can also be in the case of not having vacuum cavity 1, in other vacuum environment
Work.Transmitting device internal work air pressure is between absolute pressure 0.1Pa to 100Pa.
Embodiment 2
As in figure 2 it is shown, the present embodiment is with the difference of embodiment 1: adjacent two pole piece rings
Between insulation dottle pin 13 be set carry out dielectric, the preferred tetrafluoroethene of material of insulation dottle pin 13.Excellent
Choosing, pole piece ring is toroidal, and the material of pole piece ring is rustless steel, and pole piece ring thickness is 1mm.
Two groups of sinusoidal radio frequency low voltage voltage of phase contrast 180 ° are added on adjacent pole piece ring, pole piece
Ring has 3-1000 sheet, the internal diameter of pole piece ring to be 0.1mm～100mm, the internal diameter of front end pole piece ring
For 0.1-100mm, the internal diameter of rear end pole piece ring is 0.1-100mm, the diameter of ion intake
For 100mm, a diameter of 1mm of Ion Extraction mouth.Ion introduces electrode 5 by thickness 2mm not
Rust steel disc makes, and extraction electrode 7 is made by the stainless steel substrates of thickness 1mm.
Pole piece ring and insulation dottle pin 13 outer run through have be easy to fixed pole loop and install ring-type biography
The standing screw 12 of defeated focusing electrode 3.Fastened by nut.Nut leads to introducing electrode 5
Cross insulator cap 11 and carry out insulation processing.Screw rod insulation or screw rod are less than screw realizes insulation.
Further, jet blocking electrode 6 is discoideus, and jet blocking electrode 6 is away from ion
Focus on transmission channel end.Preferably, to be arranged on ion focusing transmission logical for jet blocking electrode 6
At front end, road 3/10ths, jet blocking electrode 6 is arranged on the 30th pole in the present embodiment
At loop, jet blocking electrode 6 is discoideus, and jet blocking electrode 6 is by four one metal wires
It is arranged on ion focusing transmission channel axis, simultaneously by four one metal wires and external power source phase
Even, with the DC voltage of 10V additional on jet blocking electrode 6.
Embodiment 3
As it is shown on figure 3, the difference of the present embodiment and embodiment 1 or embodiment 2 is: Fig. 3
For comprising transmitting device 1/4th profile of vacuum cavity, transmitting device is true by aluminium alloy system
Cavity body 1 is wrapped up, to provide enclosed environment, transmitting device internal by vacuum pumping opening 2 with
Vacuum acquirement device is connected, and to obtain the vacuum state in vacuum cavity 1, transmitting device works
Air pressure is 1Pa；Vacuum pumping opening 2 is the direct current needed for transmitting device, alternating voltage simultaneously
Offer rethreads position.
Standing screw 12 other end is fixed on mass analyzer interface 9 base, Ion Extraction
Mouth is connected with mass analyzer interface 9, and plays the effect of vacuum screened.Whole ion transmits
Device is connected with level Four bar mass analyzer by mass analyzer interface 9.Whole transmitting device
Docked with Proton transfer reaction mass spectrometry ion source by the ion source interface 8 of front end.
Certainly, this utility model also can have other various embodiments, without departing substantially from this utility model
In the case of spirit and essence thereof, those of ordinary skill in the art can make according to this utility model
Go out various corresponding change and deformation, but these change accordingly and deformation all should belong to this practicality
Novel appended scope of the claims.
Claims (10)
1. for transmitting a transmitting device for Proton-Transfer Reactions ion source, its feature
It is: include the ring-type transmission focusing electrode (3) being coaxially disposed, introduce electrode (5) and draw
Going out electrode (7), described ring-type transmission focusing electrode (3) is positioned at introducing electrode (5) and draws
Going out between electrode (7), described introducing electrode (5) is provided centrally with ion intake, draws
Electrode (7) is provided centrally with Ion Extraction mouth；Described ring-type transmission focusing electrode (3) center
Having the ion focusing transmission channel of funnel type, ion focusing transmission channel end is towards Ion Extraction
Mouthful, described ion intake, ion transmission channel, Ion Extraction mouth are connected, described ion
Jet blocking electrode (6) it is provided with in transmission channel.
Transmitting device the most according to claim 1, it is characterised in that: also include vacuum chamber
Body (1), described ring-type transmission focusing electrode (3), introducing electrode (5) and extraction electrode
(7) being located at vacuum cavity (1) internal, described introducing electrode (5) is located at vacuum cavity (1)
Front end, extraction electrode (7) is located at vacuum cavity (1) rear end, vacuum cavity (1) is front,
Rear end is equipped with its internal opening through, and described opening is the most right with ion focusing transmission channel,
Vacuum cavity (1) and ring-type transmission focusing electrode (3), introducing electrode (5), jet resistance
Insulated electro isolation, described vacuum cavity (1) between gear electrode (6) and extraction electrode (7)
Sidewall is provided with vacuum pumping opening (2).
Transmitting device the most according to claim 1 and 2, it is characterised in that: described ring-type
Transmission focusing electrode (3) uses the structure that multiple pole piece ring coaxial spaced arranges, adjacent two
Electric insulation between pole piece ring, the internal diameter of pole piece ring subtracts to Ion Extraction mouth successively from ion intake
Little.
Transmitting device the most according to claim 3, it is characterised in that: described pole piece ring
Generally circular in shape ring-type or square ring.
Transmitting device the most according to claim 4, it is characterised in that: described pole piece ring
Internal diameter be 0.1mm～200mm, pole piece ring thickness is 0.1mm～10mm, adjacent two
Distance between pole piece ring is 0.1mm～20mm.
Transmitting device the most according to claim 3, it is characterised in that: adjacent two pole pieces
Being applied with phase contrast on ring is 170 °～the sine of 190 ° or cosine radio frequency low-voltage (4),
The absolute value of described radio frequency low-voltage (4) is less than 500V, frequency 100k Hz～10M Hz.
Transmitting device the most according to claim 1, it is characterised in that: described jet stops
Electrode (6) is located on the axis of ion transmission channel.
8. according to the transmitting device described in claim 1 or 7, it is characterised in that: described jet
Blocking electrode (6) is discoideus, and jet blocking electrode (6) is away from ion focusing transmission channel
End.
9. according to the transmitting device described in claim 1 or 7, it is characterised in that: described jet
DC voltage and/or radio frequency low-voltage it is applied with on blocking electrode (6), described DC voltage,
The absolute value of radio frequency low-voltage is less than 500V.
Transmitting device the most according to claim 3, it is characterised in that: adjacent two poles
It is provided with insulation dottle pin (13), described pole piece ring and insulation dottle pin (13) outer between loop to pass through
It is installed with and is easy to fixed pole loop and the standing screw (12) of ring-type transmission focusing electrode (3) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224044.7U CN205595303U (en) | 2016-03-22 | 2016-03-22 | A transmission device for transmitting proton transfer reaction ion source intermediate ion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224044.7U CN205595303U (en) | 2016-03-22 | 2016-03-22 | A transmission device for transmitting proton transfer reaction ion source intermediate ion |
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| CN205595303U true CN205595303U (en) | 2016-09-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653555A (en) * | 2016-12-29 | 2017-05-10 | 上海华质生物技术有限公司 | Ion transmission focusing and screening device |
| CN106876242A (en) * | 2016-12-29 | 2017-06-20 | 上海华质生物技术有限公司 | Ion transmits focusing arrangement |
| CN107221488A (en) * | 2016-03-22 | 2017-09-29 | 四川大学 | A kind of transmitting device for being used to transmit Proton-Transfer Reactions ion source |
| CN110868790A (en) * | 2019-11-26 | 2020-03-06 | 成都理工大学工程技术学院 | Negative hydrogen ion extraction device |
-
2016
- 2016-03-22 CN CN201620224044.7U patent/CN205595303U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221488A (en) * | 2016-03-22 | 2017-09-29 | 四川大学 | A kind of transmitting device for being used to transmit Proton-Transfer Reactions ion source |
| CN106653555A (en) * | 2016-12-29 | 2017-05-10 | 上海华质生物技术有限公司 | Ion transmission focusing and screening device |
| CN106876242A (en) * | 2016-12-29 | 2017-06-20 | 上海华质生物技术有限公司 | Ion transmits focusing arrangement |
| CN106653555B (en) * | 2016-12-29 | 2018-11-02 | 上海华质生物技术有限公司 | Ion transmission focuses and screening plant |
| CN106876242B (en) * | 2016-12-29 | 2019-02-01 | 上海华质生物技术有限公司 | Ion transmits focusing device |
| CN110868790A (en) * | 2019-11-26 | 2020-03-06 | 成都理工大学工程技术学院 | Negative hydrogen ion extraction device |
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