CN207964723U - A kind of normal pressure open type Portable laser mass spectrograph - Google Patents
A kind of normal pressure open type Portable laser mass spectrograph Download PDFInfo
- Publication number
- CN207964723U CN207964723U CN201820368544.7U CN201820368544U CN207964723U CN 207964723 U CN207964723 U CN 207964723U CN 201820368544 U CN201820368544 U CN 201820368544U CN 207964723 U CN207964723 U CN 207964723U
- Authority
- CN
- China
- Prior art keywords
- laser
- normal pressure
- open type
- pressure open
- mass spectrograph
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
The utility model provides a kind of normal pressure open type Portable laser mass spectrograph, belong to field of analytic instrument, it specifically includes control unit, first laser device, ionize chamber with mass analyzer, the first light path system, normal pressure open type, the first laser device is that can form the laser of specific wavelength corresponding with element resonant frequency to be surveyed.When this programme is measured for trace element using mass spectrograph, since its content is extremely low, lead to detection difficult and lower signal-to-noise ratio, laser to select corresponding wavelength according to the resonant frequency of prediction element carries out selectively resonant excitation, then it is detected again, therefore can accomplish selectively to detect object, improve the signal-to-noise ratio of object to be detected, the concentrations for reducing object to be detected are suitable for tailored version detection.
Description
Technical field
The utility model is related to field of analytic instrument, refer in particular to a kind of normal pressure open type Portable laser mass spectrograph.
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, it is not necessarily to any additional system
Sample, sampling and sample introduction facility, the normal pressure open type that real meaning may be implemented exempt from sample preparation measurement.By being acquired in the method
Be the plasma generated after laser bombardment, therefore ionic species contained in plasma (has in laser irradiation process
Imitate the sample molecule or atom of ionization) determine ingredient in the sample that can effectively detect.For micro and trace
Element detection (such as ppb grades even Element detection of Asia ppb concentration), since contained amount is extremely low, leads to detection difficult and relatively low
Signal-to-noise ratio.
Utility model content
Technical problem to be solved in the utility model is：Normal pressure open type Portable laser mass spectrograph measures trace in sample
When element, since constituent content to be surveyed is extremely low, lead to detection difficult and lower signal-to-noise ratio.
In order to solve the above-mentioned technical problem, this programme discloses a kind of normal pressure open type Portable laser mass spectrograph, specific to wrap
It includes：Control unit, the first laser device being connected with control unit, the mass analyzer being connected with control unit, further including can be right
In the laser generated laser beam carry out shaping, transmission, direction and focusing the first light path system, and be used for shape
Chamber is ionized at the normal pressure open type of sample to be tested plasma, the first light path system can be by laser produced by first laser device
In guiding to ionization chamber；
The first laser device is that can form the laser of specific wavelength corresponding with element resonant frequency to be surveyed.
Further, the first laser device is tunable laser.
Further, it is certain long wavelength laser that the first laser device, which is selected, and standing wave length resonates according to element to be surveyed
Frequency is determined.
Further, produced laser can be directed to ionization chamber through the first light path system in the first laser device
In sample on.
In addition, normal pressure open type Portable laser mass spectrograph further includes for bombarding sample to be tested and generating the of plasma
Dual-laser device, and the second light path system corresponding with second laser, the second light path system can will be produced by second lasers
Laser aiming to the ionization chamber, second laser is also connected with described control unit.
Further, produced laser can be directed to ionization chamber through the second light path system in the second laser
In sample to be tested on and bombard sample to be tested and form plasma, produced laser can be through the first light in the first laser device
Road system is directed on the plasma formed in ionization chamber simultaneously resonant excitation plasma.
Further, the normal pressure open type Portable laser mass spectrograph further includes laser beam obstruction device, is worn for stopping
Cross the plasma to be measured non-irradiated laser beam on sample to be tested.
When this programme is measured for trace element using mass spectrograph, since its content is extremely low, cause detection difficult and
Lower signal-to-noise ratio, to which the laser of resonant wavelength laser can be provided using the method and correspondence of laser resonant excitation, from
And optionally resonant excitation element to be surveyed, therefore optionally detect object, the signal-to-noise ratio of object to be detected is improved, is dropped
The concentrations of low object to be detected are suitable for tailored version detection.
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 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 normal pressure open type Portable laser.
In figure, 1- mass analyzers, 2- control units, 3- first laser devices, the first light path systems of 4-, 5- plasmas,
6- samples, 7- second lasers, the second light path systems of 8-, 9- laser beam obstruction devices.
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.
In conjunction with Fig. 1, in one embodiment, in conjunction with the above method, this programme also discloses a kind of normal pressure open type just
Laser mass spectrometry instrument is taken, is specifically included：Control unit 2, the first laser device 3 being connected with control unit 2 are connected with control unit 2
Mass analyzer 1, further include that can carry out shaping, transmission, direction and focusing to generated laser beam in the laser
The first light path system 4, and be used to form sample to be tested plasma 5 normal pressure open type ionization chamber, the first light path
System 4 can extremely ionize laser aiming produced by first laser device 3 in chamber；
The first laser device 3 is that can form the laser of specific wavelength corresponding with element resonant frequency to be surveyed, described
Produced laser can be directed to through the first light path system 4 on the sample 6 in ionization chamber in one laser 3.In the program
Laser mass spectrometry instrument, used first laser device 3 can generate and the laser of element resonant frequency corresponding wavelength to be surveyed,
Its specific type can be preferably tunable laser or the first laser device 3 also can be selected as certain long wavelength laser,
Standing wave length is determined according to element resonant frequency to be surveyed.Either that laser, purport are all to generate and be intended to
Survey the laser of element resonant frequency corresponding wavelength.According to the element to be surveyed in sample to be tested 6, the wavelength of first laser device 3 is adjusted
Either select the laser of specific wavelength so that it sends out the laser of specific wavelength to first laser, and in the first light path system 4
Under the action of, the laser of specific wavelength is directed among ionization chamber, under the irradiation of specific wavelength laser, on the one hand may be used
It bombards sample 6 and generates plasma 5, while the laser of the specific wavelength of the first laser device 3 also can resonant excitation element to be surveyed
Then the either atom in molecule, molecule or group etc. are measured again via mass analyzer 1, are analyzed, accomplish may be selected
Property resonant excitation element to be surveyed, therefore optionally detect object, improve the signal-to-noise ratio of object to be detected, reduce to be detected
The concentrations of object are suitable for tailored version detection.
Specifically, when being measured using above-mentioned normal pressure open type Portable laser mass spectrograph, it may include following steps：
S1, the resonant frequency for determining trace element to be surveyed in sample to be tested；
S2, the laser that specific wavelength corresponding with the frequency is selected according to the resonant frequency of gained；
S3, irradiation survey and resonant excitation trace element to be surveyed are carried out using the laser of selected specific wavelength；
S4, the trace element to be surveyed of resonant excitation is measured using the mass analyzer of laser mass spectrometry instrument.
Normal pressure open type Portable laser mass spectrograph in this programme, key ideas are to resonate frequently using with element to be surveyed
The laser of wavelength corresponding to rate improves the signal-to-noise ratio of object to be detected come element to be measured in selectively resonant excitation sample, drop
The concentrations of low object to be detected are suitable for tailored version detection.On the one hand can be the specific wavelength and in the S3 steps
Laser directly irradiate bombardment sample to be tested and resonant excitation element to be surveyed.On the other hand, can also be (non-first with a laser
With in survey element resonant frequency corresponding wavelength laser) bombardment sample to be tested form plasma to be measured, then recycle described in
The laser of specific wavelength irradiates plasma to be measured and resonant excitation element to be measured.
In addition, in conjunction with Fig. 2, in another embodiment, normal pressure open type Portable laser mass spectrograph further includes being waited for for bombarding
Sample 6 and the second laser 7 for generating plasma 5, and second light path system 8 corresponding with second laser 7, second
Light path system 8 can by laser aiming produced by second laser 7 to the ionization chamber, second laser 7 also with the control
Unit 2 processed is connected.Produced laser can be directed to through the second light path system 8 in ionization chamber in the second laser 7
Sample to be tested 6 on and bombard sample to be tested 6 and form plasma 5, produced laser can be through first in the first laser device 3
Light path system 4 is directed on the plasma 5 formed in ionization chamber simultaneously resonant excitation plasma 5.That is this reality
It includes two lasers to apply the laser mass spectrometry instrument in a scheme, wherein second laser 7 is for generating laser and in the second light path
System 8 is directed to ionization chamber and bombards sample to be tested 6 and form plasma 5 under acting on, which includes being intended to
The element of measurement and other a variety of non-it need to measure element etc..At the same time, first laser device 3 is recycled to be formed and element to be surveyed
The laser of the laser of resonant frequency corresponding wavelength, the specific wavelength to ionization chamber and resonates through the conduction of the first light path system 4
Excitation is formed by plasma 5, then measures, analyzes via mass analyzer 1 again, accomplishes optionally to resonate sharp
Hair element to be surveyed, therefore optionally detect object, the signal-to-noise ratio of object to be detected is improved, the detection for reducing object to be detected is dense
Degree is suitable for tailored version detection.
In addition, the normal pressure open type Portable laser mass spectrograph further includes laser beam obstruction device 9, the laser beam is utilized
Obstruction device 9 can be stopped across the plasma 5 to be measured non-irradiated laser beam on sample to be tested 6.
This programme is directed in the prior art, when trace element is measured using normal pressure open type Portable laser mass spectrograph,
Since element to be surveyed content itself is extremely low, so as to cause the technical problems such as detection difficult and lower signal-to-noise ratio, this programme thus
The corresponding laser that resonant frequency corresponding wavelength laser can be provided using one, is swashed using this in normal pressure open-type laser mass spectrograph
Light then optionally resonant excitation element to be surveyed, therefore optionally detect object, the signal-to-noise ratio of object to be detected is improved,
The concentrations for reducing object to be detected are suitable for tailored version detection.
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 (7)
1. a kind of normal pressure open type Portable laser mass spectrograph, which is characterized in that including：Control unit is connected with control unit
First laser device, the mass analyzer being connected with control unit, further including can be to generated laser beam in the laser
Carry out shaping, transmission, direction and focusing the first light path system, and be used to form sample to be tested plasma normal pressure open wide
Formula ionizes chamber, and the first light path system can extremely ionize laser aiming produced by first laser device in chamber；
The first laser device is that can form the laser of specific wavelength corresponding with element resonant frequency to be surveyed.
2. normal pressure open type Portable laser mass spectrograph as described in claim 1, which is characterized in that the first laser device is can
Tuned laser.
3. normal pressure open type Portable laser mass spectrograph as described in claim 1, which is characterized in that the first laser device is selected
For certain long wavelength laser, standing wave length is determined according to element resonant frequency to be surveyed.
4. normal pressure open type Portable laser mass spectrograph as described in any one of claims 1-3, which is characterized in that described first swashs
Produced laser can be directed to through the first light path system on the sample in ionization chamber in light device.
5. normal pressure open type Portable laser mass spectrograph as described in any one of claims 1-3, which is characterized in that further include being used for
Bombardment sample to be tested and the second laser for generating plasma, and the second light path system corresponding with second laser, the
Two light path systems can by laser aiming produced by second laser to the ionization chamber, second laser also with the control
Unit is connected.
6. normal pressure open type Portable laser mass spectrograph as claimed in claim 5, which is characterized in that institute in the second laser
It generates on the sample to be tested that laser can be directed to through the second light path system in ionization chamber and bombards sample to be tested and formed
Gas ions, produced laser can be directed to through the first light path system formed in ionization chamber in the first laser device
On plasma and the resonant excitation plasma.
7. normal pressure open type Portable laser mass spectrograph as claimed in claim 6, which is characterized in that the normal pressure open type is portable
Laser mass spectrometry instrument further includes laser beam obstruction device, non-irradiated on sample to be tested across plasma to be measured for stopping
Laser beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368544.7U CN207964723U (en) | 2018-03-16 | 2018-03-16 | A kind of normal pressure open type Portable laser mass spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368544.7U CN207964723U (en) | 2018-03-16 | 2018-03-16 | A kind of normal pressure open type Portable laser mass spectrograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207964723U true CN207964723U (en) | 2018-10-12 |
Family
ID=63743637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820368544.7U Active CN207964723U (en) | 2018-03-16 | 2018-03-16 | A kind of normal pressure open type Portable laser mass spectrograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207964723U (en) |
-
2018
- 2018-03-16 CN CN201820368544.7U patent/CN207964723U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Allan et al. | Quantitative sampling using an Aerodyne aerosol mass spectrometer 1. Techniques of data interpretation and error analysis | |
| Pisonero et al. | Critical revision of GD-MS, LA-ICP-MS and SIMS as inorganic mass spectrometric techniques for direct solid analysis | |
| US6750449B2 (en) | Sampling and analysis of airborne particulate matter by glow discharge atomic emission and mass spectrometries | |
| Yang et al. | Development of a palm portable mass spectrometer | |
| Marcus et al. | Liquid sampling-atmospheric pressure glow discharge (LS-APGD) microplasmas for diverse spectrochemical analysis applications | |
| US20050133710A1 (en) | Method and apparatus for ion mobility spectrometry | |
| CN107271429B (en) | Quantitative analysis method for elements in unknown sample by combining spectrum with mass spectrum | |
| WO1994029717A1 (en) | Laser-based detector of nitro-containing compounds | |
| US5826214A (en) | Hand-held probe for real-time analysis of trace pollutants in atmosphere and on surfaces | |
| CN108169092A (en) | Atmospheric particulates heavy metal and its isotope on-line water flushing devices and methods therefor | |
| Liu et al. | Determination of uranium isotopic ratio (235 U/238 U) using extractive electrospray ionization tandem mass spectrometry | |
| Chung et al. | Comparison of microconcentric and membrane-desolvation sample introduction systems for determination of low rare earth element concentrations in surface and subsurface waters using sector field inductively coupled plasma mass spectrometry | |
| Akmalov et al. | A laser desorption ion-mobility increment spectrometer for detection of ultralow concentrations of nitro compounds | |
| CN108695135A (en) | Ion source and method for generating element ion from aerosol particle | |
| CN108169320A (en) | The laser mass spectrometry measuring method of one trace elements and normal pressure open type Portable laser mass spectrograph | |
| Li et al. | Direct detection of chemical warfare agent simulants in soil by thermal desorption-low temperature plasma-mass spectrometry | |
| Hartonen et al. | Current instrumentation for aerosol mass spectrometry | |
| CN207964723U (en) | A kind of normal pressure open type Portable laser mass spectrograph | |
| Li et al. | Detection of uranium in industrial and mines samples by microwave plasma torch mass spectrometry | |
| CN207964722U (en) | A kind of multiple beam normal pressure open type Portable laser mass spectrograph | |
| CN207662844U (en) | A kind of portable laser mass spectrograph that can be worked under atmospheric environment | |
| CN208187913U (en) | Atmospheric particulates heavy metal and its isotope on-line water flushing device | |
| US20050269508A1 (en) | Apparatus and methods for detecting compounds using mass spectra | |
| CN107907586A (en) | A kind of portable laser mass spectrograph that can be worked under atmospheric environment | |
| Ghoreyshi et al. | A distinct approach to laser plasma spectroscopy through internal reference standard method with peak intensity-based self-absorption correction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |