CN207964722U - A kind of multiple beam normal pressure open type Portable laser mass spectrograph - Google Patents
A kind of multiple beam normal pressure open type Portable laser mass spectrograph Download PDFInfo
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- CN207964722U CN207964722U CN201820368494.2U CN201820368494U CN207964722U CN 207964722 U CN207964722 U CN 207964722U CN 201820368494 U CN201820368494 U CN 201820368494U CN 207964722 U CN207964722 U CN 207964722U
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Abstract
The utility model provides the short a kind of multiple beam normal pressure open type Portable laser mass spectrograph of plasma lifetime to be measured in a kind of solution normal pressure open-type laser mass spectrograph, belongs to technical field of analytical instruments, specifically includes：Control unit, optical excited laser, contents analyzer, excitation light path system, normal pressure open type ionize chamber, further include forming the reinforcing optical branching for strengthening plasmon light beam to be measured or reinforcing laser.The program is for normal pressure open-type laser mass spectrograph sample to be tested in non-vacuum environment ionization is formed by plasma density and stability is low, short life the shortcomings that, secondary or multi irradiation is carried out using laser plasma and strengthens plasma to be measured, further increase the degree of ionization of plasma, plasma intermediate ion concentration is promoted, and extends plasma lifetime.To effectively improve accuracy of detection, the signal-to-noise ratio of accuracy and signal.
Description
Technical field
The utility model is related to field of analytic instrument, refer in particular to a kind of multiple beam normal pressure open type Portable laser mass spectrum
Instrument.
Background technology
Mass spectrograph is a kind of instrument that the mass number of ion is analyzed according to the mass-to-charge ratio of ion, can be by measuring mass-to-charge ratio
Contain amount and type with chemical composition present in the abundance of gaseous ion identification sample, Element and isotope detection and point
There is irreplaceable role in analysis.It reports and shows according to market survey, global mass spectrum market realizes 49.20 hundred million dollars within 2015
The output value, the five-year reaches 72.79 hundred million dollars of market scale by with 8.1% annual compound growth rate in the year two thousand twenty.2015
Year global mass spectrum market Middle and North America area portion is maximum, followed by Europe and the Asian-Pacific area.But the five-year the Asian-Pacific area market will
With highest annual compound growth rate dilatation, become the important business revenue battlefield of mass spectrum supplier one.Based on application field, the market
Can be divided into pharmacy, biotechnology, industrial chemistry, environmental monitoring, mineral exploration, frontier inspection, drug law enforcement, customs, nuclear material tracking,
Explosives detection, food and drink detection etc..Only 2013, China was with regard to nearly 500,000,000 dollars of the mass spectroscopy device of import.It was opened from 2011
Dynamic《National special scientific equipment development project》In, China has had been put into several hundred million first funds and mass spectrographic has been ground for advanced
Hair.
With growing, the correlation of food security, environmental protection, safety and anti-terrorism, food security and medical treatment ＆ health demand
Trace element (such as uranium, the heavy metals such as lead and mercury) and the measurement of isotope obtained increasingly extensive concern.Therefore portable
Formula open air in-situ measuring method and relevant device become the recent focus of attention.Regrettably traditional mass spectrograph is all true
The lower operation of sky, bulky, equipment is complicated, has significant limitation in cost and portability.
Ion source is one of mass spectrographic core component, it has been largely fixed mass spectrographic sensitivity.Traditional ionization
Method include electron impact ionization (EI), Chemical Ionization (CI), Fast Atom Bombardment (FAB),
Matrix Assisted Laser Desorption ionizes the methods of (MALDI), thermal ionization (TIMS), is required for operating in vacuum environment.In recent years,
With electron spray ionisation (ESI), Direct Analysis in Real Time (DART), inductively coupled plasma (ICP), atmospheric pressure chemical ionization
(APCI), atmospheric pressure photoionization (APPI), atmospheric pressure solid analysis probe ionization (ASAP), laser ablation electron spray (LAESI)
The utility model of equal ionization methods so that antivacuum mass-spectrometer measurement is possibly realized.Regrettably current antivacuum mass-spectrometer measurement
There is also following problems：
1. can not be operated under real atmospheric environment, suitable atmosphere and temperature are needed.Such as ICP, APCI, APPI,
ASAP；
2. it is very big to be affected by the external environment.Such as ESI, DART, LAESI；
3. being all soft ionization method, hard, indissoluble, infusibility, difficult ionized sample can not be successfully managed；
4. needing auxiliary device to crush sample, dissolving even atomization process.
Defect both is from the deficiency of ionization method itself existing for current antivacuum mass-spectrometer measurement.Either ESI is also
It is the methods of DART, use is all electronics or ion injection method to make sample charge.Such soft ionization method is to easy
Desorption, volatile, soluble material is very applicable, but just for hard, non-volatile, indissoluble, infusibility, the difficult sample ionized
It is helpless.Especially current portable antivacuum mass spectroscopy device, be usually equipped with a series of mating sample preparations, sampling and
Sample introduction facility.
For the defect of above-mentioned vacuum mass spectrometer, substituted using normal pressure open type Portable laser mass spectrograph.This sets
It is standby to use a laser as ion source, it is based on its high-energy density, laser can be crushed under atmospheric environment and be ionized known
Any material (can be any form such as solid, liquid crystal, liquid, gas) simultaneously produces plasma.By institute in the method
Acquisition is the plasma generated after laser bombardment, therefore the service life of plasma, stability, distribution and density all will be straight
Connect influence measurement effect.As far as is known, the service life of plasma, the service life was shorter usually within several microseconds.Due to it is equal from
The high temperature and pressure characteristic of daughter, plasma are begun to from the initial of generation to periphery free space high speed diffusion so that wait from
The distribution of daughter and density are in a dynamic changing process always.Open type atmospheric environment so that energetic plasma is sudden and violent simultaneously
It is exposed to air environment, is easily reacted with the ingredients such as oxygen molecule, hydrone contained in air, to directly affect plasma
Body life time, stability and composition information.
Utility model content
Technical problem to be solved in the utility model is：Normal pressure open type Portable laser mass spectrograph because sample to be tested from
Sonization does not carry out under vacuum so that ionization is formed by plasma density and stability is low, short life, to influence to divide
Analyse the correctness and stability of result.
In order to solve the above-mentioned technical problem, the utility model discloses a kind of multiple beam normal pressure open type Portable laser mass spectrums
Instrument specifically includes control unit, the optical excited laser being connected with control unit, the mass analyzer being connected with control unit, also
Including generated laser beam in the optical excited laser can be carried out shaping, transmission, direction and focusing excitation light path system
System, and it is used to form the normal pressure open type ionization chamber of sample to be tested plasma, excitation light path system can swash excitation
On sample to be tested and sample to be tested is excited to form plasma to be measured in laser aiming produced by light device to ionization chamber；
Further include forming the reinforcing optical branching for strengthening plasmon light beam to be measured or reinforcing laser.
Further, the excitation light path system is also connected at least one reinforcing optical branching, and strengthening optical branching can be by laser light
Beam guides to ionization chamber and for irradiating, strengthening sample to be tested plasma.
Further, the laser beam incident angle of each conduction to the ionization chamber is different, including its angle
The laser beam of sample to be tested in ionization chamber can be irradiated to by meeting.
Further, further include at least one reinforcing laser being connected with control unit and matched reinforcing light path system
System, light path system can be reinforced and guide to ionization chamber and irradiate, strengthen sample to be tested plasma by strengthening the light beam of laser
Body.
Further, each laser beam incident angle for being directed to the ionization chamber is different, including its angle
Degree meets the laser beam that can be irradiated to sample to be tested in ionization chamber.
Further, the multiple beam normal pressure open type Portable laser mass spectrograph further includes laser beam obstruction device, is used for
It stops across the plasma to be measured non-irradiated laser beam on sample to be tested.
Further, the optical excited laser or reinforcing laser are continuous wave laser.
Further, the optical excited laser or reinforcing laser are millisecond pulse laser, microsecond pulse laser, receive
Any one in pulse per second (PPS) laser, picosecond pulse laser, femtosecond pulse laser or chirped pulse laser.
This programme is directed to the transient lifetime defect of plasma, and proposes to carry out using laser plasma secondary and more
Secondary irradiation and strengthen plasma to be measured, further increase the degree of ionization of plasma, promote plasma intermediate ion concentration, and
Extend plasma lifetime.To effectively improve accuracy of detection, the signal-to-noise ratio of accuracy and signal.
Description of the drawings
The concrete structure of the utility model is described in detail below in conjunction with the accompanying drawings
Fig. 1 is a kind of mass spectrometric structural schematic diagram of multiple beam normal pressure open type Portable laser of the utility model；
Fig. 2 is the mass spectrometric structural schematic diagram of the utility model another kind multiple beam normal pressure open type Portable laser.
In figure, 1- mass analyzers, 2- control units, 3- optical excited lasers, 4- excitation light paths system, 5- strengthen laser
Device, 6- strengthen light path system, 7- plasmas, 8- samples, 9- laser beams obstruction device, 10- and strengthen optical branching.
Specific implementation mode
For the technology contents of the utility model, construction feature, the objects and the effects are described in detail, below in conjunction with implementation
Mode simultaneously coordinates attached drawing to be explained in detail.
The present invention program design is：Laser irradiation sample to be tested form plasma to be measured after, then to it is to be measured etc. from
Daughter carries out the secondary or secondary above laser irradiation, further increases the degree of ionization of plasma to be measured, promotes plasma to be measured
Body intermediate ion concentration, extends the service life of plasma to be measured.To efficiently solve plasma to be measured shape under atmospheric environment
The problem of state shakiness.In addition, the laser beam used in the described secondary or secondary above laser irradiation comes from same laser institute shape
At laser beam splitter or described secondary or secondary above laser irradiation laser beam used distinguish from different lasers
The laser beam of formation.The secondary or secondary above laser irradiation is carried out to plasma to be measured in this way, can all realize, further
The degree of ionization for improving plasma, promotes the ion concentration of plasma to be measured.
In conjunction with Fig. 1, in one embodiment, a kind of multiple beam normal pressure open type Portable laser mass spectrograph is disclosed, had
Body includes control unit 2, the optical excited laser being connected with control unit 23, the mass analyzer 1 being connected with control unit 2, is gone back
Including generated laser beam in the optical excited laser 3 can be carried out shaping, transmission, direction and focusing excitation light path system
System 4, and it is used to form the normal pressure open type ionization chamber of 8 plasma of sample to be tested.Optical excited laser 3 coordinates exciting light
Road system 4,8 surface of sample can be irradiated to by mainly forming a laser beam, excite sample 8, form plasma 7, recycle matter
Contents analyzer 1 measures analysis.Further include that at least one reinforcing and coordinates laser 5 with it other than optical excited laser 3
Reinforcing light path system 6 with by generated light beam guide to ionization chamber, with to excitation gained plasma to be measured 7 into
The secondary irradiation of row, reinforcing.In the present solution, using this kind of mass spectrograph, can directly under atmospheric environment to various types of samples into
Row measures analysis, convenient, simple, and using strengthen laser and its strengthen light path system excitation can be formed by it is to be measured etc.
Gas ions carry out secondary irradiation or the secondary above irradiation, improve the degree of ionization of plasma to be measured, promote plasma to be measured
Intermediate ion concentration extends the service life of plasma to be measured so that measurement result is more stable, accurate.I.e. the program utilizes multiple
Laser is respectively formed for exciting sample to form the laser of plasma to be measured with irradiation plasma to be measured and to it
Carry out the reinforcing laser of reignition, reinforcing.
Preferably, each laser beam incident angle for being directed to the ionization chamber is different, but at least wraps
It includes its angle and meets the laser beam that can be irradiated to sample to be tested in ionization chamber.It can that is, at least needing laser beam
It irradiates sample to be tested and forms plasma to be measured, then plasma to be measured can be in the spoke of other all directions laser beams
According under, reignition, reinforcing maintain the stability and concentration of plasma itself.
In conjunction with Fig. 2, in another specific embodiment, it is also specifically disclosed that another multiple beam normal pressure open type Portable laser
Mass spectrograph, the mass spectrograph specifically include control unit 2, the optical excited laser being connected with control unit 23, are connected with control unit 2
Mass analyzer 1, further include generated laser beam in the optical excited laser 3 can be carried out shaping, transmission, direction and
The excitation light path system 4 of focusing, and it is used to form the normal pressure open type ionization chamber of 8 plasma 7 of sample to be tested.This
Outside, the excitation light path system 4 connects at least one reinforcing optical branching 10 and forms the laser for strengthening plasma 7 to be measured
Beam splitting.Sample to be tested 8 is placed among ionizing chamber, and laser is generated in optical excited laser, swashed caused by one side
Light is by excitation light path system conductive to ionization chamber and is irradiated to sample to be tested surface and excites and to form plasma to be measured.
On the other hand, generated laser is by strengthening the conduction of optical branching 10 to ionization chamber and irradiating plasma to be measured so that
Plasma reignition to be measured is strengthened, and the stability and concentration of plasma itself are maintained.I.e. in the present solution, utilizing one
A laser combines multiple light paths so that has multiple laser beam splitting that can be irradiated to ionization chamber, that is, includes for exciting sample
The laser beam splitter of plasma to be measured is formed, also includes for the secondary laser irradiated and ionize, strengthen plasma to be measured
Beam splitting, to maintain the concentration and stability of plasma to be measured.
In addition, the laser beam splitter incident angle of each conduction to the ionization chamber is different, but include at least its angle
Degree meets the laser beam splitter for the sample to be tested that can be irradiated in ionization chamber.That is, at least needing laser beam splitter can irradiate
Sample to be tested simultaneously excites sample to be tested and forms plasma to be measured, and then plasma to be measured can be in the spoke of other laser beam splitters
According under, reignition maintains itself stability and concentration.
In one embodiment, the multiple beam normal pressure open type Portable laser mass spectrograph further includes that laser beam stops
Device 9, for stopping across plasma to be measured non-irradiated laser beam or laser beam splitter on sample to be tested.
Finally, the optical excited laser 3 or reinforcing laser 5 can be continuous wave laser, or pulse laser,
Such as it is specially millisecond pulse laser, microsecond pulse laser, nanosecoud pulse laser, picosecond pulse laser, femtosecond pulse
Any one in laser or chirped pulse laser.
This programme is directed to the transient lifetime defect of plasma, and proposes to carry out using laser plasma secondary and more
Secondary irradiation further increases the degree of ionization of plasma, promotes plasma intermediate ion concentration, and extend plasma lifetime.
To effectively improve accuracy of detection, the signal-to-noise ratio of accuracy and signal.And corresponding mass spectrograph is specifically disclosed accordingly, it utilizes
The mass spectrograph can carry out secondary irradiation to plasma to be measured, be remarkably improved plasma lifetime, concentration and stability, with
And effectively inhibit plasma diffusion, the correctness and stabilization of normal pressure open type Portable laser spectrometer analysis can be effectively improved
Property.
Herein, up, down, left, right, before and after only represents its relative position and does not indicate that its absolute position, the foregoing is merely
The embodiments of the present invention, it does not limit the scope of the patent of the present invention, every to utilize the utility model specification
And equivalent structure or equivalent flow shift made by accompanying drawing content, it is applied directly or indirectly in other relevant technical fields,
It is equally included in the patent within the scope of the utility model.
Claims (8)
1. a kind of multiple beam normal pressure open type Portable laser mass spectrograph, it is characterised in that：Including control unit, with control unit phase
Optical excited laser even, the mass analyzer being connected with control unit, further including can be to generated in the optical excited laser
Laser beam carry out shaping, transmission, direction and focusing excitation light path system, and be used to form sample to be tested plasma
Normal pressure open type ionizes chamber, and excitation light path system can will wait in laser aiming produced by optical excited laser to ionization chamber
In sample and sample to be tested is excited to form plasma to be measured；
Further include forming the reinforcing optical branching for strengthening plasmon light beam to be measured or reinforcing laser.
2. multiple beam normal pressure open type Portable laser mass spectrograph as described in claim 1, it is characterised in that：The excitation light path
System is also connected at least one reinforcing optical branching, and strengthening optical branching can guide to ionization chamber by laser beam and be used for spoke
According to, strengthen sample to be tested plasma.
3. multiple beam normal pressure open type Portable laser mass spectrograph as claimed in claim 2, it is characterised in that：It is each to be directed to
The laser beam incident angle of the ionization chamber is different, including its angle satisfaction can be irradiated to it is to be measured in ionization chamber
The laser beam of sample.
4. multiple beam normal pressure open type Portable laser mass spectrograph as described in claim 1, it is characterised in that：Further include at least one
The reinforcing laser and matched reinforcing light path system being connected with control unit, the light beam for strengthening laser can be strong
Change light path system to guide to ionization chamber and irradiate, strengthen sample to be tested plasma.
5. multiple beam normal pressure open type Portable laser mass spectrograph as claimed in claim 4, it is characterised in that：It is each to be directed to
The laser beam incident angle of the ionization chamber is different, including its angle satisfaction can be irradiated to it is to be measured in ionization chamber
The laser beam of sample.
6. the multiple beam normal pressure open type Portable laser mass spectrograph as described in claim 2 or 4, it is characterised in that：The mostly light
Beam normal pressure open type Portable laser mass spectrograph further includes laser beam obstruction device, for stopping across plasma to be measured non-spoke
Shine the laser beam on sample to be tested.
7. the multiple beam normal pressure open type Portable laser mass spectrograph as described in claim 2 or 4, it is characterised in that：The excitation
Laser strengthens laser as continuous wave laser.
8. the multiple beam normal pressure open type Portable laser mass spectrograph as described in claim 2 or 4, it is characterised in that：The excitation
Laser strengthens laser as millisecond pulse laser, microsecond pulse laser, nanosecoud pulse laser, picosecond pulse laser
Any one in device, femtosecond pulse laser or chirped pulse laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820368494.2U CN207964722U (en) | 2018-03-16 | 2018-03-16 | A kind of multiple beam normal pressure open type Portable laser mass spectrograph |
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| CN201820368494.2U CN207964722U (en) | 2018-03-16 | 2018-03-16 | A kind of multiple beam normal pressure open type Portable laser mass spectrograph |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445073A (en) * | 2018-03-16 | 2018-08-24 | 常州英诺激光科技有限公司 | Solve the method and mass spectrograph that plasma lifetime to be measured is short in normal pressure open-type laser mass spectrograph |
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- 2018-03-16 CN CN201820368494.2U patent/CN207964722U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445073A (en) * | 2018-03-16 | 2018-08-24 | 常州英诺激光科技有限公司 | Solve the method and mass spectrograph that plasma lifetime to be measured is short in normal pressure open-type laser mass spectrograph |
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