CN207457076U - A kind of tealeaves heavy metal analysis device - Google Patents
A kind of tealeaves heavy metal analysis device Download PDFInfo
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- CN207457076U CN207457076U CN201721162188.5U CN201721162188U CN207457076U CN 207457076 U CN207457076 U CN 207457076U CN 201721162188 U CN201721162188 U CN 201721162188U CN 207457076 U CN207457076 U CN 207457076U
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- speculum
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- heavy metal
- tealeaves
- tea samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
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- Optics & Photonics (AREA)
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Abstract
The utility model discloses tealeaves heavy metal analysis devices, belong to field of spectral analysis technology, dual-beam pulse laser module and closed sample room including being used to generate beam of laser and the second beam laser with time interval；Closed sample room is equipped with window, inflating port and gas outlet.Tealeaves heavy metal analysis device disclosed in the utility model, dual-beam pulse laser module generates the two beam laser with time interval, with realize the first beam laser ablation carbonization Tea Samples and the second beam laser again excitation laser induced plasma in the separation of space-time, solve the contradiction between spatial discrimination and sensitivity, weaken the influence of matrix effect, improve stability, the sensitivity of the detection of tealeaves target heavy metal element.
Description
Technical field
The utility model is related to field of spectral analysis technology, more particularly to a kind of tealeaves heavy metal analysis device.
Background technology
China is the native place of tea, and is tea export big country, and the hygienic quality problem of tealeaves is directly related to Tea Industry
Prospect, wherein heavy metal pollution problem becomes one of safe and healthy major issue of tealeaves, certainly will add China's tealeaves and go out
" green barrier " of mouth.According to customs statistics, each teas outlet in China in 2014 declines comprehensively, 30.1 ten thousand tons of tealeaves general export, together
Than declining 7.5%.Therefore, from the long-term interest of China's Tea Industry, the noxious pollutants such as heavy metal in tealeaves are strengthened
It detects most important.
But existing induced with laser spectral technique causes laser induced breakdown spectroscopy to be examined due to the influence of matrix effect
The stability of survey, sensitivity, accuracy are poor, and detection limit also can not be reduced further.
In conclusion the method for heavy metal of the existing laser induced breakdown spectroscopy in tealeaves is detected, there is
The shortcomings that detecting stability, sensitivity, poor accuracy, therefore, it is necessary to design effective device and its next gram of detection method
Take disadvantage mentioned above.
Utility model content
The defects of in order to overcome the prior art, the technical problem to be solved by the utility model is to propose a kind of tealeaves weight
Metal detection device, dual-beam pulse laser module can generate two beam laser parallel and with intervals, with reality
Show the first beam laser ablation carbonization Tea Samples and the second beam laser point of the excitation laser induced plasma on space-time again
From, that is, separation of the laser ablation stripping with two processes of follow-up excitation-detection on space-time is completed, solve spatial discrimination
Contradiction between sensitivity, weakens the influence of matrix effect, improves the stability, sensitive of tealeaves target heavy metal element detection
Degree.
For this purpose, the utility model uses following technical scheme：
The utility model provides a kind of tealeaves heavy metal analysis device, including being used to generate first with time interval
The dual-beam pulse laser module and closed sample room of Shu Jiguang and the second beam laser；
The top of the closed sample room is equipped with window, the one side of the closed sample room is equipped with inflating port, described closed
The opposite side of sample room is equipped with gas outlet；
Vertically impact is on Tea Samples by the window for the beam of laser, to the Tea Samples ablation carbon
Change, generate laser induced plasma；Wherein, the Tea Samples are located in the closed sample room；
Inert gas is filled with by the inflating port, the laser induced plasma is blown out into institute by the gas outlet
State closed sample room；
The second beam laser excites the laser induced plasma again, generates laser induced plasma again
Body.
Optionally, further include to reflect the first speculum of the beam of laser, swash for focusing on first beam
First condenser lens of light；
First speculum is located at the emission side of the dual-beam pulse laser module；
First condenser lens is located at the lower section of first speculum and positioned at the top of the closed sample room.
Optionally, the second speculum, the 3rd speculum and the second condenser lens are further included；
3rd speculum is located at the lower section of second speculum；
Second condenser lens is located at the lower section of the 3rd speculum and positioned at the oblique upper of the gas outlet.
Optionally, tertiary focusing lens, fibre-optical probe, spectrometer are further included；
The tertiary focusing lens are between the 3rd speculum and the fibre-optical probe；
The fibre-optical probe is connected by optical fiber with the spectrometer.
Optionally, computer, delayer are further included；
The computer is electrically connected with the spectrometer；
First control terminal of the delayer is electrically connected with the dual-beam pulse laser module, and the second of the delayer
Control terminal is electrically connected with the spectrometer.
Optionally, further include to carry the turntable of the Tea Samples；
The turntable is located in the closed sample room.
Optionally, the preprocessing module for being pre-processed to the Tea Samples is further included；
What the preprocessing module included being sequentially connected is used to that the Tea Samples to be dried to form dry tealeaves sample
The drying machine of product, for the dry Tea Samples mill to be formed dried powder Tea Samples grinding mill, for pair
The dried powder Tea Samples carry out sieving formed smalls Tea Samples cross sieve and to the smalls Tea Samples into
Row tabletting forms the tablet press machine of sheet Tea Samples.
Optionally, first speculum angle in the horizontal direction, second speculum and described 3rd anti-
It penetrates the angle of mirror in the horizontal direction and is each configured to 45 degree；
First mirror arrangement is any one in plane mirror and high power speculum；
Second mirror arrangement is any one of plane mirror and high power speculum；
3rd mirror arrangement is perforation speculum.
Optionally, the delayer is configured to DG645 delayers.
The beneficial effects of the utility model are：
A kind of tealeaves heavy metal analysis device provided by the utility model, the utility model pass through dual-beam pulse mode of laser
Block 1 generates two beam laser parallel and with intervals, to realize the first beam laser ablation carbonization Tea Samples and the
Separation of the excitation laser induced plasma on space-time again of two beam laser, that is, complete laser ablation and remove and subsequently swash
Separation of two processes of detection on space-time is sent out, the contradiction between spatial discrimination and sensitivity is solved, weakens matrix effect
It influences, improves stability, the sensitivity of the detection of tealeaves target heavy metal element.
Description of the drawings
Fig. 1 is a kind of structure diagram for tealeaves heavy metal analysis device that specific embodiment of the present invention provides；
Fig. 2 is a kind of structure diagram for pretreatment unit that specific embodiment of the present invention provides.
In figure：
1st, dual-beam pulse laser module；2nd, closed sample room；3rd, the first speculum；4th, the second speculum；5th, the 3rd is anti-
Penetrate mirror；6th, the first condenser lens；7th, the second condenser lens；8th, tertiary focusing lens；9th, fibre-optical probe；10th, spectrometer；11st, count
Calculation machine；12nd, delayer；13rd, turntable；14th, preprocessing module；15th, laser induced plasma；16th, excitation laser lures again
Lead plasma；21st, window；22nd, inflating port；23rd, gas outlet；110th, beam of laser；120th, the second beam laser；141st, it is dry
Machine；142nd, grinding mill；143rd, sieve is crossed；144th, tablet press machine.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Fig. 1 schematically illustrates a kind of structure diagram of tealeaves heavy metal analysis device, as shown in Figure 1, the device
Including be used for generate with time interval 110 and second beam laser 120 of beam of laser dual-beam pulse laser module 1,
And closed sample room 2；The top of closed sample room 2 is equipped with window 21, the one side of closed sample room 2 is equipped with inflating port 22, close
The opposite side for closing sample room 2 is equipped with gas outlet 23；Vertically impact is right on Tea Samples by window 21 for beam of laser 110
Tea Samples ablation is carbonized, and generates laser induced plasma 15；Wherein, Tea Samples are located in closed sample room 2；By filling
Gas port 22 is filled with inert gas and laser induced plasma 15 is blown out closed sample room 2 by gas outlet 23；Second beam laser
120 pairs of laser induced plasmas 15 excite again, generate excitation laser induced plasma 16 again.Specifically, double light
Bundle of pulsed laser module 1 can generate two beam laser parallel and with intervals, generate beam of laser first
110,110 ablation of beam of laser of generation carbonization Tea Samples surface and generate laser induced plasma 15；The generated
Two beam laser 120 excite laser induced plasma 15 again, generate excitation laser induced plasma 16 again, to realize
110 ablation of beam of laser be carbonized Tea Samples and the second beam laser 120 again excitation laser induced plasma 15 in space-time
On separation, that is, complete laser ablation and remove and separation of two processes on space-time of follow-up excitation-detection, solve empty
Between differentiate contradiction between sensitivity, weaken the influence of matrix effect, improve the stabilization of tealeaves target heavy metal element detection
Property, sensitivity.Wherein, the time interval between two beam laser can be set according to specific requirement of experiment, can specifically be led to
Cross 12 control time interval of delayer.Preferably, gas is configurable to nitrogen, can also be other gases, as long as can will swash
Photoinduction plasma 15 blows out closed sample room 2 and does not interfere with and target heavy metal element is analyzed；The material of window 21
Material is configured to quartz, wherein, the material of window 21 can also use glass etc..
In order to understand how beam of laser 110 is specifically reached on Tea Samples, optionally, further include to reflect
First speculum 3 of beam of laser 110, the first condenser lens 6 for focusing on beam of laser 110；First speculum 3
In the emission side of dual-beam pulse laser module 1；First condenser lens 6 is located at the lower section of the first speculum 3 and positioned at closed sample
The top of product room 2.Specifically, the beam of laser 110 that dual-beam pulse laser module 1 generates is anti-by the first speculum 3
It is mapped on the first condenser lens 6, the laser of focusing is focused on window 21 by the first condenser lens 6, by window 21 by focusing
Laser vertical is impacted on Tea Samples, can vertically be impacted on the surface of Tea Samples, the laser is to Tea Samples ablation carbon
Change, generate laser induced plasma 15.
In order to understand how the second beam laser 120 is specifically reached on laser induced plasma 15, optionally, further include
Second speculum 4, the 3rd speculum 5 and the second condenser lens 7；3rd speculum 5 is located at the lower section of the second speculum 4；The
Two condenser lenses 7 are located at the lower section of the 3rd speculum 5 and positioned at the oblique uppers of gas outlet 23.Specifically, dual-beam pulse swashs
The second beam laser 120 that optical module 1 generates is reflected by the second speculum 4 on the 3rd speculum 5, and then is reached from closed sample
This room 2 is filled on the laser induced plasma 15, which is excited again, and generation swashs again
Laser induced plasma 16 is sent out, extends the service life of laser induced plasma 15 with this, is realized and above-mentioned laser ablation
Carbonization and the two processes of subsequent excitation-detection solve the contradiction between spatial discrimination and sensitivity from the separation on space-time,
Weaken the influence of matrix effect, improve stability, the sensitivity of the detection of tealeaves target heavy metal element.Wherein, the 3rd speculum 5
It is perforation transmitting mirror.
Wherein it is preferred to the first speculum 3 angle in the horizontal direction and the second speculum 4 are in the horizontal direction
Angle is each configured to 45 degree, and can making beam of laser 110, vertically reflection is gone down by the first speculum 3；Second beam laser 120
By the second speculum 4, vertically reflection is gone down；First speculum 3 is configured to any one in plane mirror or high power speculum
Kind；Second speculum 4 is configured to any one in plane mirror or high power speculum；First speculum 3 and the second reflection
Mirror 4 may be configured to the speculum of other species, as long as can by laser vertical reflect speculum can.
Optionally, tertiary focusing lens 8, fibre-optical probe 9, spectrometer 10 are further included；It is anti-that tertiary focusing lens 8 are located at the 3rd
It penetrates between mirror 5 and fibre-optical probe 9；Fibre-optical probe 9 is connected by optical fiber with spectrometer 10.Specifically, it is saturating by tertiary focusing
Mirror 8 will focus on fibre-optical probe 9 by excitation laser induced plasma 16 again, and fibre-optical probe 9 is by the excitation laser again of collection
Induced plasma 16 sends spectrometer 10 to, and to this, excitation laser induced plasma 16 carries out photoelectricity turn to spectrometer 10 again
Change is handled, and generates laser induced breakdown spectroscopy data.Wherein, spectrometer 10 can be integrated with 1024 × 256 ICCD
(Intensified charge-coupled device enhance charge coupling device) detector, has higher spectrally resolved
The detection range of rate and bigger can be realized and multiple element is gathered simultaneously, and can be needed to select not share the same light according to experiment
Grid are so as to selecting suitable resolution ratio to meet experiment demand.
Optionally, computer 11, delayer 12 are further included；Computer 11 is electrically connected with spectrometer 10；The of delayer 12
One control terminal is electrically connected with dual-beam pulse laser module 1, and the second control terminal of delayer 12 is electrically connected with spectrometer 10.Specifically
For, spectrometer 10 sends induced with laser spectroscopic data to computer 11, and computer 11 passes through to induced with laser spectroscopic data
Spectrum analysis is carried out, obtains the content of beary metal of Tea Samples.Delayer 12 can control dual-beam pulse laser module 1 to send
Laser between time interval, for example, between two beams that dual-beam pulse laser module 1 can also be controlled to send can be controlled
Time interval is 1.76 microseconds；Delayer 12 can also can control the delay time of laser spectrum analyser 10.Preferably, delayer 12
It is configured to D4645 delayers.DG645 delay controllers, can accurately control dual-beam pulse laser module 1, spectrometer 10 it
Between sequential relationship, laser induced plasma 15 is gathered under definite time delay so as to meet, meets requirement of experiment.
Optionally, further include to carry the turntable 13 of Tea Samples；Turntable 13 is located in closed sample room 2.Rotation
Turntable 13 can remain a constant speed rotary motion, set turntable 13, can accurately control the angular speed of rotation, linear velocity and
Acceleration meets laser and uniformly impacts the uniformity on Tea Samples surface, ensureing defocusing amount.In addition, in specific implementation, it can be with
Turntable 13 is set to remain a constant speed rotary motion according to same direction, for example, can be according to clockwise or counter-clockwise
Direction.Here the Tea Samples that Tea Samples can be not pretreated Tea Samples or process pre-processes, when
So, the Tea Samples by pretreatment are than 15 effect of laser induced plasma of the generation of not pretreated Tea Samples
It is good, and then subsequent detection result also can be accordingly good.
So, for the clear pretreatment to Tea Samples, Fig. 2 schematically illustrates one kind provided by the utility model
The structure diagram of preprocessing module 14, as shown in Figure 2.The device further includes the pre- place for being pre-processed to Tea Samples
Manage module 14；What preprocessing module 14 included being sequentially connected to form dry Tea Samples and does for Tea Samples to be dried
Dry machine 141, for mill forming the grinding mill 142 of dried powder Tea Samples, for drying to dry Tea Samples
Powdered tea leaves sample carries out sieving and forms the sieve 143 excessively of smalls Tea Samples and carry out tabletting shape to smalls Tea Samples
The tablet press machine 144 of slabbing Tea Samples.As can be seen that be pretreatment physically to the pretreatment of Tea Samples here,
Only pass through dry, mill, sieving, the physics pre-treatment such as tabletting, control its granularity, flatness, degree of adhesion, conjugation, into
And improve its and detect stability, accuracy, stability, it is pre-processed without complicated Tea Samples, processing detection process is simple,
Green.
The utility model is described with reference to the preferred embodiments, and those skilled in the art know, is not departing from this reality
In the case of with new spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.This reality
It is not limited to the particular embodiment disclosed with new, other embodiments fallen into claims hereof all belong to
In the scope of the utility model protection.
Claims (9)
1. a kind of tealeaves heavy metal analysis device, it is characterised in that：
Dual-beam pulse including being used to generate beam of laser (110) and the second beam laser (120) with time interval swashs
Optical module (1) and closed sample room (2)；
The top of the closed sample room (2) is equipped with window (21), the one side of the closed sample room (2) is equipped with inflating port
(22), the opposite side of the closed sample room (2) is equipped with gas outlet (23).
2. a kind of tealeaves heavy metal analysis device as described in claim 1, it is characterised in that：
Further include to reflect the first speculum (3) of the beam of laser (110), for focusing on the beam of laser
(110) the first condenser lens (6)；
First speculum (3) is located at the emission side of the dual-beam pulse laser module (1)；
First condenser lens (6) is located at the lower section of first speculum (3) and positioned at the upper of the closed sample room (2)
Side.
3. a kind of tealeaves heavy metal analysis device as described in claim 1, it is characterised in that：
Further include the second speculum (4), the 3rd speculum (5) and the second condenser lens (7)；
3rd speculum (5) is located at the lower section of second speculum (4)；
Second condenser lens (7) be located at the lower section of the 3rd speculum (5) and positioned at the gas outlet (23) it is oblique on
Side.
4. a kind of tealeaves heavy metal analysis device as claimed in claim 2 or claim 3, it is characterised in that：
Further include tertiary focusing lens (8), fibre-optical probe (9), spectrometer (10)；
The tertiary focusing lens (8) are between the 3rd speculum (5) and the fibre-optical probe (9)；
The fibre-optical probe (9) is connected by optical fiber with the spectrometer (10).
5. a kind of tealeaves heavy metal analysis device as claimed in claim 4, it is characterised in that：
Further include computer (11), delayer (12)；
The computer (11) is electrically connected with the spectrometer (10)；
First control terminal of the delayer (12) is electrically connected with the dual-beam pulse laser module (1), the delayer
(12) the second control terminal is electrically connected with the spectrometer (10).
6. a kind of tealeaves heavy metal analysis device as described in claim 1, it is characterised in that：
Further include to carry the turntable (13) of the Tea Samples；
The turntable (13) is located in the closed sample room (2).
7. a kind of tealeaves heavy metal analysis device as described in claim 1, it is characterised in that：
Further include the preprocessing module (14) pre-processed to the Tea Samples；
What the preprocessing module (14) included being sequentially connected is used to that the Tea Samples to be dried to form dry tealeaves sample
The drying machine (141) of product, for mill forming the grinding mill of dried powder Tea Samples to the dry Tea Samples
(142), sieve (143) and right is crossed for what the dried powder Tea Samples were carried out with sieving forms smalls Tea Samples
The smalls Tea Samples carry out the tablet press machine (144) that tabletting forms sheet Tea Samples.
8. a kind of tealeaves heavy metal analysis device as claimed in claim 2 or claim 3, it is characterised in that：
Angle, second speculum (4) and the 3rd speculum of first speculum (3) in the horizontal direction
(5) angle in the horizontal direction is each configured to 45 degree；
First speculum (3) is configured to any one in plane mirror and high power speculum
Second speculum (4) is configured to any one in plane mirror and high power speculum；
3rd speculum (5) is configured to perforation speculum.
9. a kind of tealeaves heavy metal analysis device as claimed in claim 5, it is characterised in that：
The delayer (12) is configured to DG645 delayers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721162188.5U CN207457076U (en) | 2017-09-11 | 2017-09-11 | A kind of tealeaves heavy metal analysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721162188.5U CN207457076U (en) | 2017-09-11 | 2017-09-11 | A kind of tealeaves heavy metal analysis device |
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| Publication Number | Publication Date |
|---|---|
| CN207457076U true CN207457076U (en) | 2018-06-05 |
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ID=62282702
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721162188.5U Expired - Fee Related CN207457076U (en) | 2017-09-11 | 2017-09-11 | A kind of tealeaves heavy metal analysis device |
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| CN (1) | CN207457076U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000163A (en) * | 2019-04-08 | 2019-07-12 | 王娟 | A kind of oral restoration correction auxiliary device |
| CN110361336A (en) * | 2019-07-19 | 2019-10-22 | 浙江大学 | Efficiently go out sample sample room for microwave plasma torch laser ablation system |
| CN112857951A (en) * | 2020-12-31 | 2021-05-28 | 湖南省茶叶研究所 | Tea soup micro-component detection device |
-
2017
- 2017-09-11 CN CN201721162188.5U patent/CN207457076U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000163A (en) * | 2019-04-08 | 2019-07-12 | 王娟 | A kind of oral restoration correction auxiliary device |
| CN110000163B (en) * | 2019-04-08 | 2021-08-27 | 王娟 | Oral cavity repair corrects auxiliary device |
| CN110361336A (en) * | 2019-07-19 | 2019-10-22 | 浙江大学 | Efficiently go out sample sample room for microwave plasma torch laser ablation system |
| CN112857951A (en) * | 2020-12-31 | 2021-05-28 | 湖南省茶叶研究所 | Tea soup micro-component detection device |
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