CN109884035A - A kind of detection device of sample to be tested, detection method and false-proof detection method - Google Patents
A kind of detection device of sample to be tested, detection method and false-proof detection method Download PDFInfo
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Abstract
The present invention relates to technical field of spectral detection, refer in particular to a kind of detection device of sample to be tested, detection method and false-proof detection method, it includes atomising device, inductively coupled plasma flare generator, femtosecond pulse generator and spectral collection module, inductively coupled plasma flare generator is for generating plasma torch, atomising device is used to sample to be tested being converted to aerosol, femtosecond pulse generator is used to form femtosecond chevilled silk or plasma grating, spectral collection module is used to collect the electromagnetic wave signal of plasma sending and forms the characteristic spectrum of sample to be tested.The features such as high efficiency, reliability and high temperature that inductively coupled plasma flare handles substance had both been utilized in the present invention, the unrivaled advantages such as real-time, quick, the micro- damage of laser breakdown spectrum detection technique, full elemental analysis are combined again, the interference for overcoming fluorescence background improves sensitivity and the signal-to-noise ratio of detection spectrum.
Description
Technical field
The present invention relates to technical field of spectral detection, refer in particular to the detection device of sample to be tested a kind of, detection method and
False-proof detection method.
Background technique
In recent years, the demand to the detection of common sample element is increasing, such as to a huge sum of money in water body and soil
Belong to the detection of element to monitor and administer the pollution of heavy metal, the detection of various elements in the organic matters such as vegetables, tealeaves is commented
Estimate its influence quality to intake human body；The fake and forged problem of various canteen drinks etc. is also on the rise simultaneously, to various drinks
The true and false of product and food is distinguished can also usually be analyzed by detecting wherein characteristic element.
Traditional species analysis detection is carried out after generalling use sampling by the processing of laboratory chemical reagent and spectral instrument
The method of analysis.Although these method accuracy in detection are high, traditional method detection cycle is longer, not can be carried out quickly i.e.
When detect, and in detection process chemical reagent processing be easy to produce secondary pollution.Recently, occur in conjunction with newest research results
A series of new detection technique method such as hyperspectral analysis technology, electrochemical methods, bioanalysis, Terahertz analytic approach
Deng still remaining that pretreatment is complicated, cannot obtain a result real-time, quickly, be easy to cause secondary pollution problems.
Laser induced breakdown spectroscopy (Laser-Induced Breakdown Spectroscopy, LIBS) is new in recent years
Emerging spectrum detection technique, compared with other spectral techniques, because of its damage simple with sample pretreatment, real-time, quick, micro-, entirely
The unrivaled advantage such as elemental analysis, has obtained extensive concern, be also widely used for metallurgical analysis, environmental monitoring,
The fields such as matter exploration, on-line monitoring, national defence.This method for sample monitoring only need to sample carry out simple process even without
Processing can carry out laser induced breakdown spectroscopy analysis, but there is a problem that detection sensitivity is not high, how avoid background
How spectrum not victim signal spectral intensity and signal-to-noise ratio again simultaneously, effectively improve Element detection sensitivity, be key point.
In addition, there are continuous background fluorescence caused by very strong inverse bremstrahlen for traditional nanosecond laser induced breakdown spectroscopy
Spectrum can cover echo signal spectrum.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of detection sensitivities for improving sample to be tested chemical constituent
Detection device, detection method and false-proof detection method, based on inductively coupled plasma flare generator (ICP) to sample
Simple process, femtosecond laser induced breakdown sample to be tested formation plasma and the characteristic spectrum for obtaining sample to be tested are carried out, is mentioned
The sensitivity that height detects sample to be tested chemical constituent.
The present invention adopts the following technical scheme:
A kind of detection device for the detection sensitivity improving sample to be tested chemical constituent comprising atomising device, inductance coupling
Close plasma torch generator, femtosecond pulse generator and spectral collection module, the inductively coupled plasma body flame
For torch generator for generating plasma torch, which is equipped with plasma exciatiaon area, and the atomising device is used
In sample to be tested to be converted to aerosol and aerosol is sent into inductively coupled plasma flare generator, plasma swashs
For pre-processing to aerosol, femtosecond pulse generator is used to form femtosecond chevilled silk or plasma light in hair area
Grid, femtosecond chevilled silk or plasma grating focus on pretreated sample to be tested, so that sample to be tested forms plasma,
Spectral collection module is used to collect the electromagnetic wave signal of plasma sending and forms the characteristic spectrum of sample to be tested.
Further, the inductively coupled plasma flare generator includes plasma torch pipe and is connected to plasma
The radio-frequency induction coil of body torch pipe, the quartz glass tube that the plasma torch pipe is coaxially disposed by three form, three quartz
Glass tube is used to be passed through working gas.
Further, the femtosecond pulse generator includes pulse laser and the focusing that connect with pulse laser
Module, the pulse width for the pulse laser that the pulse laser issues are femtosecond magnitude.
Further, the femtosecond pulse generator include pulse laser, the beam splitting that is connect with pulse laser
Module, the Domain Synchronous module being connect with beam splitting module and the focus module being connect with Domain Synchronous module, the pulse laser
The pulse width for the pulse laser that device issues is femtosecond magnitude.
Further, the spectral collection module includes fluorescence gathering system and spectrometer, the fluorescence gathering system
It is condenser lens or Optical processing system.
A kind of detection method of the chemical constituent using detection device detection sample to be tested comprising walk in detail below
It is rapid:
A, it is passed through working gas to inductively coupled plasma flare generator, so that inductively coupled plasma flare is sent out
Raw device generates plasma torch；
B, sample to be tested is packed into atomising device, sample to be tested is converted to aerosol and sprays into plasma by atomising device
The plasma exciatiaon area of body torch；
C, plasma exciatiaon area pre-processes the obtained aerosol of step B；
D, laser generator generates femtosecond chevilled silk or plasma grating, and the femtosecond chevilled silk or plasma grating focus
In the sample to be tested pre-processed through step C, the atom of sample to be tested is excited and ionized, so that the table of sample to be tested
Face forms plasma；
E, it issues when the atom in plasma in excitation state and ion transit to lower state by upper state with specific
The electromagnetic wave signal of wavelength, spectral collection module are acquired and handle to the electromagnetic wave signal, and then obtain sample to be tested
Characteristic spectrum carries out qualitative analysis or quantitative analysis according to chemical constituent of this feature spectrum to sample to be tested.
Wherein, in step C, the pretreatment is specifically included: to aerosol carry out it is molten, to go it is molten after aerosol steam
Hair forms gaseous state sample to be tested, carries out atomization processing to gaseous state sample to be tested and to atomization treated gaseous state sample to be tested
It is excited and is ionized for the first time.
Wherein, in step E, the characteristic spectrum for obtaining sample to be tested, specifically includes the following steps:
E1, the element species that sample to be tested contains are determined according to the wavelength of the electromagnetic wave signal of plasma sending；
E2, signal strength test is carried out to electromagnetic wave signal, is determined in sample to be tested according to the signal strength that test obtains
Each element content；
E3, the fitting for carrying out characteristic spectrum as parameter coordinate according to wavelength and signal strength.
A kind of false-proof detection method of the finger-print based on sample to be tested comprising step in detail below:
S1, sampling: the control sample of different batches is taken, wherein specifically include with a batch of control sample multiple same
The control sample in the place of production；
S2, finger-print acquisition of information: according to the method for the above-mentioned detection method step A-E of right successively to pair of each batch
Product are detected in the same old way, obtain the chemical constituent information of each batch control sample, which includes control sample packet
The element species and each element content contained；
S2, finger-print are established: 3 kinds of most elements of content in selected control sample, respectively using 3 kinds of elements as XYZ
Reference axis establishes three-dimensional system of coordinate, maps the corresponding content of 3 kinds of elements as three-dimensional coordinate point, that is, constitutes the control in the place of production
The finger-print of sample；
S3, anti-counterfeiting detection identification: the sample to be tested with the same place of production of sample to be tested is chosen, according to the identical method of step S2
The characteristic spectrum for obtaining sample to be tested, resulting characteristic spectrum is compared with the finger-print of control sample, according to chemistry
The otherness size of component information can identify the sample to be tested.
Beneficial effects of the present invention: the present invention innovatively by inductively coupled plasma flare to the particlized of substance with
Femtosecond chevilled silk, plasma grating breakdown spectral in ultra-fast optical combine, and inductively coupled plasma flare is both utilized
The features such as high efficiency, reliability and high temperature that substance is handled, but it is real-time, quick, micro- to combine breakdown spectral detection technique
The unrivaled advantage such as damage, full elemental analysis, overcomes the interference of fluorescence background, improves sensitivity and the letter of detection spectrum
It makes an uproar ratio；Innovatively propose that the characteristic fingerprint pattern that corresponding test substance is obtained using elemental signals intensity as fingerprint parameter makes to have
Effect ground anti-counterfeiting detection, species analysis identification, constituent analysis etc. become possibility.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of detection device of the invention；
Fig. 2 is the working principle of the invention flow diagram；
Fig. 3 is the characteristic spectrum that Wine Sample is tested；
Fig. 4 is the characteristic spectrum that Tea Samples are tested.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further below with reference to embodiment and attached drawing
Bright, the content that embodiment refers to not is limitation of the invention.
As shown in Figure 1 to Figure 2, a kind of detection device for the detection sensitivity improving sample to be tested chemical constituent comprising:
Atomising device 3, inductively coupled plasma flare generator 2, femtosecond pulse generator 1 and spectral collection module 4, it is described
For generating plasma torch, which swashs inductively coupled plasma flare generator 2 equipped with plasma
Area is sent out, the atomising device 3 is used to for sample to be tested to be converted to aerosol and aerosol is sent into inductively coupled plasma body flame
In torch generator 2, for pre-processing to aerosol, femtosecond pulse generator 1 is used to form in plasma exciatiaon area
Perhaps plasma grating femtosecond chevilled silk or plasma grating focus on pretreated sample to be tested to femtosecond chevilled silk, make
Sample to be tested formed plasma, spectral collection module 4 be used for collect plasma sending electromagnetic wave signal and formed to
The characteristic spectrum of sample.
In conjunction with Fig. 1 to 2, the working principle of the detection device is illustrated below: when detection, to inductively coupled plasma
Body torch generator 2 is passed through working gas, so that inductively coupled plasma flare generator 2 generates plasma torch, so
Sample to be tested is sent into atomising device 3 afterwards, sample to be tested is converted to aerosol with atomising device 3 and the gas for obtaining conversion is molten
Glue sprays into plasma torch, and aerosol is pre-processed in plasma exciatiaon area, and femtosecond pulse generator 1 issues
Femtosecond chevilled silk or plasma grating coke are in pretreated sample to be tested, so that the atom of sample to be tested is excited and ionizes
And then plasma is generated, the atom and ion in plasma in excitation state are from high level to the process of low energy order transition
In, a series of electromagnetic wave of different wave lengths is generated, is acquired to obtain the characteristic light of sample to be tested via spectral collection module 4
Spectrum, since the element in the characteristic spectral line and sample to be tested of characteristic spectrum corresponds, by characteristic spectrum qualitative analysis or
Quantitative analysis can be realized the chemical constituent analysis to sample to be tested and carry out species analysis identification to sample to be tested.Wherein, institute
State pretreatment, specifically include: to aerosol carry out it is molten, to go it is molten after aerosol evaporate to form gaseous state sample to be tested, to gas
State sample to be tested carries out atomization processing and treated that gaseous state sample to be tested excited for the first time and initial ionization to atomization.
The features such as high efficiency, reliability and high temperature that inductively coupled plasma flare handles substance had not only been utilized in the present invention, but also
The unrivaled advantages such as real-time, quick, the micro- damage of laser breakdown spectrum detection technique, full elemental analysis are combined, are overcome glimmering
The interference of light background improves sensitivity and the signal-to-noise ratio of detection spectrum, secondly, the present invention uses femtosecond chevilled silk or plasma
Body grating induces sample to be tested to form plasma, relative to the nanosecond laser induced breakdown spectroscopy in existing, has higher
Power density and electron density, improve the signal strength of characteristic spectrum and overcome matrix effect to the unfavorable shadow of characteristic spectrum
It rings.
In the present embodiment, the inductively coupled plasma flare generator 2 includes plasma torch pipe and is connected to
The radio-frequency induction coil of gas ions torch pipe, the quartz glass tube that the plasma torch pipe is coaxially disposed by three form, and three
Quartz glass tube is used to be passed through working gas.
It includes pulse laser 11 that the femtosecond pulse generator 1, which is also possible to, is connect with pulse laser 11
Beam splitting module 12, the Domain Synchronous module 13 being connect with beam splitting module 12 and the focus module being connect with Domain Synchronous module 13
14, specifically, the pulse laser 11 issues a branch of femtosecond pulse, it is divided into two that energy ratio is 1:1 via beam splitting module 12
Shu Jiguang, by Domain Synchronous module 13 adjust two beam laser light paths it is identical, two beam laser are focused into winged via focus module 14
Second chevilled silk, two beam femtosecond chevilled silks intersect interaction, form the plasma of space periodic modulation, raising electron density, effect
It in high-temperature particle test substance gas, and then realizes and effectively intensifies, wherein the pulse laser that the pulse laser 11 issues
Pulse width be femtosecond magnitude.But structure of the invention is without being limited thereto, when specifically used, the femtosecond pulse generator
1 can also be only including pulse laser 11 and the focus module 14 connecting with pulse laser 11, specifically, the pulse laser
Device 11 issues a branch of femtosecond pulse, which is focused into femtosecond chevilled silk via focus module 14, femtosecond chevilled silk act on to
Sample, so that the atom of sample to be tested is excited and ionizes and then formed plasma, the light path design that the present invention uses is simple
Single, stability is good.
Wherein, the beam splitting module 12 is beam splitting chip or other beam splitter optics, and the focus module 14 is monolithic
Or the focusing system that multi-disc condenser lens is constituted, it is intercoupled at an angle with reaching two beams or the synchronous chevilled silk of multi beam,
Form the plasma grating of modulation density cycle.
In the present embodiment, the spectral collection module 4 includes fluorescence gathering system and spectrometer, the phosphor collection system
System is condenser lens or Optical processing system.
In the present embodiment, a kind of detection method of the chemical constituent using above-mentioned detection device detection sample to be tested, with
Lower specific steps:
A, it is passed through working gas to inductively coupled plasma flare generator 2, so that inductively coupled plasma flare
Generator 2 generates plasma torch,
B, by sample to be tested be packed into atomising device 3 in, atomising device 3 by sample to be tested be converted to aerosol and spray into etc. from
The plasma exciatiaon area of daughter torch；
C, plasma exciatiaon area is for pre-processing the obtained aerosol of step B；
D, femtosecond pulse generator 1 generates femtosecond chevilled silk or plasma grating, the femtosecond chevilled silk or plasma
Body grating focuses on the sample to be tested pre-processed through step C, and the atom of sample to be tested is excited and ionized, so as to
The surface of sample forms plasma；
E, it issues when the atom in plasma in excitation state and ion transit to lower state by upper state with specific
The electromagnetic wave signal of wavelength, spectral collection module 4 are acquired and handle to the electromagnetic wave signal, and then obtain sample to be tested
Characteristic spectrum carries out qualitative analysis or quantitative analysis according to chemical constituent of this feature spectrum to sample to be tested.
For below using Wine Sample as sample to be tested, detection method of the invention is illustrated: first to sense coupling
Three quartz glass tubes for closing plasma torch generator are passed through working gas, and working gas can be argon gas or helium
Equal inert gases, wherein the working gas that its middle external tube is passed through is cooling air, for protecting quartz glass tube, prevent tube wall by
The effect of heat fusing；The working gas that middle pipe is passed through is auxiliary gas, and ionized gas passes through the height at the top of quartz ampoule
When frequency induction coil, the huge thermal energy and alternating magnetic field that coil generates make the electronics, ion and the neon original in ground state of ionized gas
Fierce collision occurs repeatedly for son, and the high-speed motion of various particles forms the plasma torch region of a similar coiled type,
Temperature is up to 6000-10000 degrees Celsius herein；Working gas in inner tube is carrier gas, enters plasma for guiding aerosol
In body torch, then Wine Sample is passed through in atomising device 3, sample to be tested is converted to aerosol and sprayed by atomising device 3
In plasma torch generator, the plasma torch of high temperature is evaporated Wine Sample, atomization, excitation and ionization,
Wine Sample particle gas is formed, realizes the pretreatment to Wine Sample, Wine Sample is carried out relative to using chemical reagent
Chemical treatment avoids and generates chemistry disruption and Matrix effects, and then, issuing single pulse energy by pulse laser 11 is
The femtosecond pulse of 1.6mJ, frequency 1kHz are split by beam splitting module 12, are then adjusted by Domain Synchronous module 13
After the light path of section two bundle of pulsed laser synchronizes, line focus lens forming chevilled silk adjusts space intersection and forms plasma grating, from
Daughter grating acts on Wine Sample particle gas, further excites to white wine sample particle gas and ionization puncture, generation are more more
Atom, ion of highly excited level etc., the i.e. surface of Wine Sample particle gas form plasma, to realize raising Element detection
Sensitivity, wherein in plasma in excitation state atom and ion lower state is transitted to by upper state when issue have
The electromagnetic wave of specific wavelength, at this point, the acquisition delay and on piece integral mode to the ICCD of the spectrometer used carry out rationally
Setting, carried out using high-resolution spectrometer to the lateral phosphor collection of electromagnetic wave, can sample characteristic spectrum, by right
This feature spectrum carries out qualitative analysis or quantitative analysis, the chemical constituent analysis to sample to be tested can be realized, as contained in white wine
The various microelements (potassium, aluminium, iron, copper, lead, manganese, nickel, cadmium etc.) having.Wherein, Fig. 3 is the feature that Wine Sample is tested
Spectrum.It illustrates, this detection method is suitable for the substance detection of the various states such as solid, liquids and gases, this field
Technical staff is based on the cognition to the prior art, before detection, carries out simple process into fluid sample to solid sample to be tested,
It such as handles to obtain the fluid sample of the sample to be tested through oversintering, acidification, resolution.
In the present embodiment, in step C, the pretreatment is specifically included:
To aerosol carry out it is molten, to go it is molten after aerosol evaporate to form gaseous state sample to be tested, to gaseous state sample to be tested
It carries out atomization processing and treated that gaseous state sample to be tested is excited and ionized for the first time to atomization.
In the present embodiment, in step E, the characteristic spectrum for obtaining sample to be tested, specifically includes the following steps:
E1, the element species that sample to be tested contains are determined according to the wavelength of the electromagnetic wave signal of plasma sending；
E2, signal strength test is carried out to electromagnetic wave signal, is determined in sample to be tested according to the signal strength that test obtains
Each element content；
E3, the fitting for carrying out characteristic spectrum as parameter coordinate according to wavelength and signal strength.
In the present embodiment, on the basis of there is highly sensitive detection based on the chemical constituent to sample to be tested, for treating
Chemical constituent (such as its contained element species, each element signal strength (corresponding element content), each element for containing of sample
The information such as content ratio relationship) there are specificity, uniqueness for test substance, the present invention also provides one kind based on to be measured
The false-proof detection method of the finger-print of sample, the false-proof detection method comprising the following specific steps
S1, sampling: the control sample of different batches is taken, wherein specifically include with a batch of control sample multiple same
The control sample in the place of production；
S2, finger-print acquisition of information: according to the method for above-mentioned detection method step A-E successively to the control sample of each batch
Product are detected, and obtain the chemical constituent information of each batch control sample, which includes what control sample included
Element species and each element content；
S2, finger-print are established: 3 kinds of most elements of content in selected control sample, respectively using 3 kinds of elements as XYZ
Reference axis establishes three-dimensional system of coordinate, maps the corresponding content of 3 kinds of elements as three-dimensional coordinate point, that is, constitutes the control in the place of production
The finger-print of sample；
S3, anti-counterfeiting detection identification: the sample to be tested with the same place of production of sample to be tested is chosen, according to the identical method of step S2
The characteristic spectrum for obtaining sample to be tested, resulting characteristic spectrum is compared with the finger-print of control sample, according to chemistry
The otherness size of component information can identify the sample to be tested.
For below using Tea Samples as sample to be tested, false-proof detection method of the invention is illustrated: firstly, taking
Multiple Tea Samples in the same place of production are classified as with a batch of control sample, then by tea by the Tea Samples of different sources
Leaf sample obtains the fluid sample of no precipitating through oversintering, acidification, resolution, according to step identical in embodiment to multiple same
The Tea Samples in the place of production are successively handled, and the characteristic spectrum (referring to fig. 4) with a batch of Tea Samples are obtained, then to this
Characteristic spectrum carries out quantitative analysis, obtains the element contained in Tea Samples and constituent content, chooses element in Tea Samples and contains
Three kinds of most elements of amount establish three-dimensional system of coordinate as reference axis, wherein the corresponding specific member of wavelength in characteristic light spectrogram
Element, and the corresponding corresponding signal strength of wavelength is that the element obtains content, using the corresponding content of 3 kinds of elements as three-dimensional coordinate
Point mapping, constitute the finger-print information of the Tea Samples in the place of production, then to the Tea Samples in next place of production be repeated in
Upper step obtains the finger-print information of the Tea Samples in multiple places of production, i.e. the corresponding finger-print of composition Tea Samples, for
True wine and fake wine, the element species tested, constituent content and relative scale all having differences property, this inconsistency
It being embodied on the greatest differences of respective characteristic fingerprint pattern, i.e., finger-print can be used as the exclusive signature identification of substance, thus
Realize anti-counterfeiting detection.
When carrying out the identification of tealeaves anti-counterfeiting detection, quantitative analysis is carried out to the finger-print of Tea Samples, according to three-dimensional coordinate
The standard curve of constituent content in the Tea Samples of different sources is calculated in formula, choose any one Tea Samples be used as to
Sample obtains the characteristic spectrum of the sample to be tested in conjunction with the detection device in Fig. 1, and the information of characteristic spectrum is successively substituted into not
With the standard curve of the Tea Samples in the place of production, the error with the standard curve of each batch Tea Samples is calculated, error is the smallest
The tealeaves in the place of production belonging to as, to realize that the identification of clear and rational is classified to the tealeaves of different sources.
Method of the invention is without being limited thereto, wherein can also randomly select the leaf sample in a determining place of production as to be measured
Sample obtains the characteristic spectrum of the sample to be tested in conjunction with the detection device in Fig. 1, and obtained spectral information and finger-print are believed
Breath is compared, and specifically includes the otherness between the relative scale of comparison element type, constituent content and each element, Ke Yiyou
The fake and forged tealeaves of effect identification.All technical characteristics in the present embodiment can be freely combined according to actual needs.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way,
Do not depart from the technical program design under the premise of it is any obviously replace it is within the scope of the present invention.
Claims (9)
1. it is a kind of improve sample to be tested chemical constituent detection sensitivity detection device, it is characterised in that: including atomising device,
Inductively coupled plasma flare generator, femtosecond pulse generator and spectral collection module, described inductive coupling etc. from
For daughter torch generator for generating plasma torch, which is equipped with plasma exciatiaon area, the atomization
Device be used for by sample to be tested be converted to aerosol and will aerosol be sent into inductively coupled plasma flare generator in, wait from
Daughter lasing region is used for that treated that aerosol pre-processes to atomising device, and femtosecond pulse generator is used to form winged
Perhaps to focus on plasma exciatiaon area pretreated for plasma grating femtosecond chevilled silk or plasma grating for second chevilled silk
Sample to be tested, so that sample to be tested forms plasma, spectral collection module is used to collect the electromagnetic wave letter of plasma sending
Number and form the characteristic spectrum of sample to be tested.
2. a kind of detection device of detection sensitivity for improving sample to be tested chemical constituent according to claim 1, special
Sign is: the inductively coupled plasma flare generator includes plasma torch pipe and the height for being connected to plasma torch pipe
Frequency induction coil, the quartz glass tube that the plasma torch pipe is coaxially disposed by three form, and three quartz glass tubes are used
In being passed through working gas.
3. a kind of detection device of detection sensitivity for improving sample to be tested chemical constituent according to claim 1, special
Sign is: the femtosecond pulse generator includes pulse laser and the focus module that connect with pulse laser, described
The pulse width for the pulse laser that pulse laser issues is femtosecond magnitude.
4. a kind of detection device of detection sensitivity for improving sample to be tested chemical constituent according to claim 1, special
Sign is: the femtosecond pulse generator includes pulse laser, the beam splitting module and beam splitting that connect with pulse laser
The Domain Synchronous module of module connection and the focus module being connect with Domain Synchronous module, the pulse that the pulse laser issues
The pulse width of laser is femtosecond magnitude.
5. a kind of detection device of detection sensitivity for improving sample to be tested chemical constituent according to claim 1, special
Sign is: the spectral collection module includes fluorescence gathering system and spectrometer, and the fluorescence gathering system is condenser lens
Or Optical processing system.
6. a kind of detection side of the chemical constituent using the described in any item detection device detection samples to be tested of claim 1-4
Method, which is characterized in that the detection method comprising the following specific steps
A, it is passed through working gas to inductively coupled plasma flare generator, so that inductively coupled plasma flare generator
Generate plasma torch；
B, sample to be tested is packed into atomising device, sample to be tested is converted to aerosol and sprays into plasma flame by atomising device
The plasma exciatiaon area of torch；
C, plasma exciatiaon area pre-processes the obtained aerosol of step B；
D, laser generator generates femtosecond chevilled silk or plasma grating, the femtosecond chevilled silk or plasma grating focus on through
The sample to be tested that step C is pre-processed is excited and is ionized to the atom of sample to be tested, so that the surface shape of sample to be tested
At plasma；
E, issuing when the atom in plasma in excitation state and ion transit to lower state by upper state has specific wavelength
Electromagnetic wave signal, spectral collection module is acquired and handles to the electromagnetic wave signal, and then obtains the feature of sample to be tested
Spectrum carries out qualitative analysis or quantitative analysis according to chemical constituent of this feature spectrum to sample to be tested.
7. detection method according to claim 6, it is characterised in that: in step C, the pretreatment is specifically included: right
Aerosol carry out it is molten, to go it is molten after aerosol evaporate to be formed gaseous state sample to be tested, to gaseous state sample to be tested carry out atomization
Processing and treated that gaseous state sample to be tested is excited and ionized for the first time to atomization.
8. detection method according to claim 6, it is characterised in that: in step E, the feature for obtaining sample to be tested
Spectrum, specifically includes the following steps:
E1, the element species that sample to be tested contains are determined according to the wavelength of the electromagnetic wave signal of plasma sending；
E2, signal strength test is carried out to electromagnetic wave signal, each member in sample to be tested is determined according to the signal strength that test obtains
Cellulose content；
E3, the fitting for carrying out characteristic spectrum as parameter coordinate according to wavelength and signal strength.
9. a kind of false-proof detection method of the finger-print based on sample to be tested, it is characterised in that: the false-proof detection method includes
Step in detail below:
S1, sampling: the control sample of different batches is taken, wherein specifically include multiple same places of production with a batch of control sample
Control sample；
S2, finger-print acquisition of information: the method according to the described in any item detection method step A-E of claim 6 is successively right
The control sample of each batch is detected, and the chemical constituent information of each batch control sample is obtained, which includes
The element species and each element content that control sample includes；
S2, finger-print are established: 3 kinds of most elements of content in selected control sample, respectively using 3 kinds of elements as XYZ coordinate
Axis establishes three-dimensional system of coordinate, maps the corresponding content of 3 kinds of elements as three-dimensional coordinate point, that is, constitutes the control sample in the place of production
Finger-print；
S3, anti-counterfeiting detection identification: choosing the sample to be tested with the same place of production of sample to be tested, obtains according to the identical method of step S2
The characteristic spectrum of sample to be tested resulting characteristic spectrum is compared with the finger-print of control sample, according to chemical constituent
The otherness size of information can identify the sample to be tested.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749555A (en) * | 2019-10-30 | 2020-02-04 | 宜宾五粮液股份有限公司 | Hyperspectral technology-based device and method for detecting internal fermentation state of white spirit koji |
| CN114047174A (en) * | 2021-09-29 | 2022-02-15 | 云南华谱量子材料有限公司 | Two-dimensional plasma lattice grating enhanced laser-induced breakdown spectroscopy detection sensitivity device |
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| CN114047174A (en) * | 2021-09-29 | 2022-02-15 | 云南华谱量子材料有限公司 | Two-dimensional plasma lattice grating enhanced laser-induced breakdown spectroscopy detection sensitivity device |
| CN114047174B (en) * | 2021-09-29 | 2024-05-10 | 云南华谱量子材料有限公司 | Two-dimensional plasma lattice grating enhanced laser-induced breakdown spectroscopy detection sensitivity device |
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