CN109239054A - A kind of laser induced breakdown spectroscopy electrochemical analysis system - Google Patents
A kind of laser induced breakdown spectroscopy electrochemical analysis system Download PDFInfo
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- CN109239054A CN109239054A CN201810939922.7A CN201810939922A CN109239054A CN 109239054 A CN109239054 A CN 109239054A CN 201810939922 A CN201810939922 A CN 201810939922A CN 109239054 A CN109239054 A CN 109239054A
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- 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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Abstract
The invention discloses a kind of laser induced breakdown spectroscopy electrochemical analysis systems, the working electrode connecting respectively with potentiostat is equipped in electrochemical cell, to electrode and reference electrode, laser is located above electrochemical cell, the laser emitting direction of laser is towards working electrode and the exit path is equipped with condenser lens, the light receiving device of spectrometer is located on the reflection path of the light emission direction of laser on the working electrode (s, and detector detects the spectral signal in spectrometer.Pass through the laser induced breakdown spectroscopy electrochemical analysis system of above-mentioned optimization design, laser induced breakdown spectroscopy is combined with electrochemistry, overcome the interference problem of Conventional electrochemical and the high detection limit problem of conventional laser induced breakdown spectroscopy, electrode surface state changes during realizing in-situ characterization electrochemical analysis, original position, the simply and quickly heavy metal ion content in detection of complex true environment, realize highly sensitive noiseless detection.
Description
Technical field
The present invention relates to analytical chemistry field more particularly to a kind of laser induced breakdown spectroscopy electrochemical analysis systems.
Background technique
Currently, water environment pollution problem becomes increasingly conspicuous, especially heavy metal pollution.Mining, metal smelt, chemical industry are raw
Producing the natural factors such as human factors and geologic erosion, weathering such as waste water, applying pesticides chemical fertilizer and house refuse leads to a huge sum of money
Belong to and enters water body in a variety of manners.Its micro-concentrations generates poisonous effect and has duration, cumulative bad and amplification, causes
Seriously threaten the life and health of ecological environment and the mankind.Monitoring is the basis of prevention and improvement.However, a huge sum of money in water body
The component and form for belonging to pollutant change vulnerable to environmental factor and are changed.Therefore, the scene of heavy metal contaminants is quick and precisely divided
Analyse the Contamination Assessment for Heavy Metals in Water Environment, pollution course is analyzed and support area Water resources security has important section
Learn meaning.
Currently, with the rapid development of analysis and testing technology, it is used for the method for heavy metal pollution of water body analyte detection both at home and abroad
Very much.However, largely still depending on traditional instrumental method, mainly there are atomic absorption spectrum (AAS), inductive coupling
Plasma-Emission spectroscopic methodology (ICP-AES), inductively coupled plasma body-Atomic Fluorescence Spectrometer (ICP-AFS), atom are glimmering
Light spectrum (AFS), mass spectrography (MS), UV-VIS spectrophotometry, chemoluminescence method etc..
In established Analysis on Heavy Metal Pollutants method, electrochemical analysis method (Electrochemistry, EC) because
Its equipment is simple and convenient to operate, high sensitivity, is easy to be miniaturized, automation and continuous the advantages that analyzing are in heavy metal contaminants
Field quick detection in terms of receive much attention, and be applied to practical monitoring water environment.However, its accurate analysis is still faced with
Huge challenge, main reason is that: 1. practical water body environment background is complicated, contains a large amount of inorganic mineral salt and organic matter and pH value
It is changeable etc.；2. heavy metal contaminants component and occurrence patterns multiplicity, and electrochemical behavior interferes with each other sternly between heavy metal contaminants
Weight.The presence of these objective factors directly influences the accuracy of Heavy Metal Pollution in Water Environment of China object electrochemical analysis.
Summary of the invention
To solve technical problem present in background technique, the present invention proposes a kind of laser induced breakdown spectroscopy electrification credit
Analysis system.
A kind of laser induced breakdown spectroscopy electrochemical analysis system proposed by the present invention, comprising: laser, electrochemical cell,
Potentiostat, detector, spectrometer；
Working electrode is equipped in electrochemical cell, to electrode and reference electrode, potentiostat is respectively with working electrode, to electrode
It is connected with reference electrode；
Laser is located above electrochemical cell, and the laser emitting direction of laser is towards working electrode, the laser of laser
Exit path is equipped with condenser lens；
Spectrometer is equipped with light receiving device, and light receiving device is located at the reflection path of the light emission direction of laser on the working electrode (s
On, detector is connect for detecting to the spectral signal in spectrometer with spectrometer.
Preferably, electrode and reference electrode are just oppositely arranged on the working electrode (s.
Preferably, working electrode uses the titanium sheet of CS-GO modification.
Preferably, reference electrode uses Ag/AgCl electrode.
Preferably, Pt electrodes are used to electrode.
Preferably, light receiving device is connect by optical fiber with spectrometer.
Preferably, laser is using tune Q Nd:YAG laser.
Preferably, reflecting mirror is additionally provided on the laser emitting path of laser.
In the present invention, the laser induced breakdown spectroscopy electrochemical analysis system proposed, be equipped in electrochemical cell respectively with
The working electrode of potentiostat connection, to electrode and reference electrode, laser is located at electrochemical cell top, and the laser of laser goes out
Direction is penetrated towards working electrode and the exit path is equipped with condenser lens, the light receiving device of spectrometer is located at shining for laser
On the reflection path of direction on the working electrode (s, detector detects the spectral signal in spectrometer.Pass through above-mentioned optimization
Laser induced breakdown spectroscopy is combined with electrochemistry, is overcome by the laser induced breakdown spectroscopy electrochemical analysis system of design
The interference problem of Conventional electrochemical and the high detection of conventional laser induced breakdown spectroscopy limit problem, realize the credit of in-situ characterization electrification
Electrode surface state changes during analysis, original position, the simply and quickly heavy metal ion content in detection of complex true environment,
Realize highly sensitive noiseless detection.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of laser induced breakdown spectroscopy electrochemical analysis system proposed by the present invention.
Fig. 2 is to carry out the letter that laser induced breakdown spectroscopy electrochemical in-situ detects Cr (VI) in water body using the system of Fig. 1
Number figure.
Fig. 3 is the signal graph that Cd (II) in laser induced breakdown spectroscopy Electrochemical Detection rice is carried out using the system of Fig. 1.
Specific embodiment
As shown in Figures 1 to 3, Fig. 1 is a kind of knot of laser induced breakdown spectroscopy electrochemical analysis system proposed by the present invention
Structure schematic diagram, Fig. 2 are to carry out the letter that laser induced breakdown spectroscopy electrochemical in-situ detects Cr (VI) in water body using the system of Fig. 1
Number figure, Fig. 3 be using Fig. 1 system carry out laser induced breakdown spectroscopy Electrochemical Detection rice in Cd (II) signal graph.
Referring to figs. 1 to 3, a kind of laser induced breakdown spectroscopy electrochemical analysis system proposed by the present invention, comprising: laser
1, electrochemical cell 12, potentiostat 7, detector 10, spectrometer 11；
Working electrode 4 is equipped in electrochemical cell 12, to electrode 5 and reference electrode 6, potentiostat 7 respectively with working electrode
4, electrode 5 and reference electrode 6 are connected；
Laser 1 is located at the top of electrochemical cell 12, and the laser emitting direction of laser 1 is towards working electrode 4, laser 1
Laser emitting path be equipped with condenser lens 3；
Spectrometer 11 is equipped with light receiving device 8, and light receiving device 8 is located at reflection of the light emission direction of laser 1 on working electrode 4
On path, detector 10 is connect for detecting to the spectral signal in spectrometer 11 with spectrometer 11.
In the specific work process of the laser induced breakdown spectroscopy electrochemical analysis system of the present embodiment, in advance by work electricity
Pole is immersed in heavy metal solution to be detected, it is heavy metal ion adsorbed on the working electrode (s, by after absorption working electrode place
In electrochemical cell, the laser of laser emitting is focused on the working electrode (s by convex lens and its surface of ablation is fixed
Heavy metal, heavy metal is excited and releases specific emission spectrum, and spectrometer receives the emission spectrum by light receiving device, visits
It surveys device and determines its content by detecting the specific peak parameter of heavy metal in the spectrum, to realize that content of beary metal is examined in situ
It surveys, effectively avoids the interference that cation coexists in heavy metal solution.
In the present embodiment, the laser induced breakdown spectroscopy electrochemical analysis system proposed, interior be equipped with of electrochemical cell are divided
The working electrode that is not connect with potentiostat, to electrode and reference electrode, laser is located above electrochemical cell, and laser swashs
Light exit direction is towards working electrode and the exit path is equipped with condenser lens, and the light receiving device of spectrometer is located at laser
On the reflection path of light emission direction on the working electrode (s, detector detects the spectral signal in spectrometer.By above-mentioned
The laser induced breakdown spectroscopy electrochemical analysis system of optimization design combines laser induced breakdown spectroscopy with electrochemistry, gram
The interference problem of Conventional electrochemical and the high detection limit problem of conventional laser induced breakdown spectroscopy have been taken, has realized in-situ characterization electrification
Electrode surface state changes during credit analysis, and original position, the heavy metal ion simply and quickly in detection of complex true environment contain
Amount, realizes highly sensitive noiseless detection.
In a specific embodiment, electrode 5 and reference electrode 6 are oppositely arranged above working electrode 4.
In the specific choice mode of electrode, working electrode 4 is using the titanium sheet of CS-GO modification, and reference electrode 6 is using Ag/
AgCl electrode uses Pt electrodes to electrode 5, improves working electrode to the adsorbance of heavy metal ion, to greatly improve inspection
The sensitivity of survey.
In order to reduce detection error, light receiving device 8 is connect by optical fiber 9 with spectrometer 11, reduces light loss.
In the selection mode of laser, using Q Nd:YAG laser is adjusted, laser is converged laser 1 by condenser lens
Heavy metal plasma is generated to working electrode surface, plasma resonance optical signals are received electro-optical device and collected, the light being collected into
Signal is by fiber coupling to spectrometer.
In other specific embodiments, it is additionally provided with reflecting mirror 2 on the laser emitting path of laser 1, is convenient for laser
The flexible setting of position.
Cr (VI) is detected compared to electrochemical method, the operating condition of local laser induced breakdown spectroscopy electrochemistry is warmer
It is low with, Monitoring lower-cut and efficiently avoid from the interference that cation coexists.
Using the Cr (VI) in the laser induced breakdown spectroscopy electrochemical analysis system in situ detection aqueous solution of the present embodiment
In the process:
Cr VI (Cr (VI)) is a kind of pair of highly harmful heavy metal contaminants of human health.We construct
One laser induced breakdown spectroscopy electrochemical appliance, for the Cr (VI) in situ detection water environment, the Cr (VI) in water is main
With HCrO4 -Form exists, and three electrodes are respectively the Ti piece of CS-GO modification as working electrode, and Ag/AgCl electrode is as reference electricity
Pole and Pt electrodes are as auxiliary electrode.Specific detection scheme is as follows:
Firstly, 20 μ L chitosan-modified graphene (CS-GO) suspension for containing 5mg/mL is uniformly dripped with liquid-transfering gun
To working electrode Ti on piece, the Ti piece purity of working electrode is 99.99%, with a thickness of 0.25mm.CS-GO is increased by Electrostatic Absorption
Add to HCrO4 -Absorption, make more HCrO4 -It is adsorbed on working electrode.
Secondly, applying 1.5V positive voltage on the working electrode (s, the duration is 600s to drive HCrO4 -It is shifted from solution
To working electrode surface.These operations are all carried out in electrochemical workstation CHI 660D.
Then, the HCrO being enriched with4 -Content by local laser induced breakdown spectroscopy carry out quantitative analysis.Adjust QNd:YAG
Laser (Brilliant, Quantel) as incident radiant, the wavelength for exporting laser is 1064nm, repetition rate 1Hz,
The ceiling capacity of pulse is 100mJ, pulse width 5ns.Laser is gathered in electrochemistry by convex lens (focal length 100mm)
The HCrO4- anion that on working electrode and its surface of ablation is enriched with forms plasma, sends out during plasma is cooling
Specific signal is received by light receiving device out, enters spectrometer by fiber optic conduction.Spectral signal of the ICCD detector to spectrometer
It is detected, then carries out data analysis using computer software.
Laser induced breakdown spectroscopy electrochemical in-situ detect water body in various concentration Cr (VI) detection figure as shown in Fig. 2,
Show to detect Cr (VI) compared to electrochemical method, the operating condition milder of local laser induced breakdown spectroscopy electrochemistry, inspection
Survey lower limit is low and efficiently avoids from the interference that cation coexists.
Cd in noiseless detection rice is realized using the present embodiment laser induced breakdown spectroscopy electrochemical analysis system
(II):
Cadmium (Cd) toxicity is very big and widely distributed in the soil." poison rice " event has been because of caused by Cd pollution in soils
By people's extensive concern.Cd content in detection rice is the act of necessity.However, the complicated component of rice, is rich in various nothings
Machine object and organic substance, and content is usually higher by decades of times or more than Cd (II) concentration.Laser induced breakdown spectroscopy electrochemistry can
Realize Cd (II) pollutant in the noiseless accurate true rice environment of detection.Three electrodes are respectively that the Ti piece of CS-GO modification is made
For working electrode, Ag/AgCl electrode is as reference electrode and Pt electrodes as auxiliary electrode.
Firstly, Ti piece is cleaned by ultrasonic in acetone, the Ti piece after cleaning, which immerses, contains diallyl dimethyl ammoniumchloride
Solution in 10 minutes, make Ti piece surface containing positive charge.Then this positive charge Ti piece is put into negative electrical charge graphene oxide (GO again
(-)) in solution, obtain the Ti piece of GO (-) modification.Using the Ti piece of GO (-) modification as working electrode, Ag/AgCl electrode is as ginseng
Than electrode, Pt electrodes are as auxiliary electrode.
Then, the Cd (II) in rice digestion solution is transferred to the Ti on piece of GO (-) modification by Electrostatic Absorption from solution.
Apply negative voltage in the Ti on piece of modification and Cd (II) is reduced into Cd (0) and then deposition on the working electrode (s.
Then, laser is gathered in quantitative analysis Cd concentration on electrochemical working electrode by convex lens.The laser used lures
It is identical as upper one embodiment to lead breakdown spectral.
The results showed that the inorganic ions in rice does not cause laser induced breakdown spectroscopy Electrochemical Detection Cd (II)
Apparent interference.Electrochemistry enrichment and participation while laser induced breakdown spectroscopy are to obtain accurate noiseless detection in this experiment
Necessary condition.Fig. 3 discloses laser induced breakdown spectroscopy electrochemistry and conventional laser induced breakdown spectroscopy detects true rice
The comparison of the sensitivity of Cd (II) in environment finds 3 orders of magnitude of the high sensitivity of laser induced breakdown spectroscopy electrochemistry,
Low 2 orders of magnitude of Monitoring lower-cut.Laser induced breakdown spectroscopy electrochemistry not only overcomes electrochemistry during atual detection
Common interference problem when method detection of complex sample, while conventional laser induced breakdown spectroscopy is also improved in detection environment sample
The excessively high problem of the Monitoring lower-cut faced when product.Laser induced breakdown spectroscopy electrochemistry is noiseless in the sample of complicated component
The content of detection heavy metal contaminants provides a feasible scheme.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of laser induced breakdown spectroscopy electrochemical analysis system characterized by comprising laser (1), electrochemical cell
(12), potentiostat (7), detector (10), spectrometer (11)；
Working electrode (4) are equipped in electrochemical cell (12), to electrode (5) and reference electrode (6), potentiostat (7) respectively with work
Make electrode (4), electrode (5) and reference electrode (6) are connected；
Laser (1) is located above electrochemical cell (12), and the laser emitting direction of laser (1) is towards working electrode (4), laser
The laser emitting path of device (1) is equipped with condenser lens (3)；
Spectrometer (11) is equipped with light receiving device (8), and light receiving device (8) is located at the light emission direction of laser (1) on working electrode (4)
Reflection path on, detector (10) is connect for detecting to the spectral signal in spectrometer (11) with spectrometer (11).
2. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1, which is characterized in that electrode (5)
It is oppositely arranged above working electrode (4) with reference electrode (6).
3. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1 or 2, which is characterized in that work electricity
Pole (4) uses the titanium sheet of CS-GO modification.
4. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1 or 2, which is characterized in that reference electricity
Pole (6) uses Ag/AgCl electrode.
5. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1 or 2, which is characterized in that electrode
(5) Pt electrodes are used.
6. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1, which is characterized in that light receiving device (8)
It is connect by optical fiber (9) with spectrometer (11).
7. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1, which is characterized in that laser (1)
Using tune Q Nd:YAG laser.
8. laser induced breakdown spectroscopy electrochemical analysis system according to claim 1, which is characterized in that laser (1)
Laser emitting path on be additionally provided with reflecting mirror (2).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693512A (en) * | 2020-06-15 | 2020-09-22 | 天津大学 | Method for quantitatively detecting heavy metal elements in milk based on laser-induced breakdown spectroscopy |
| CN112161969A (en) * | 2020-10-23 | 2021-01-01 | 中国科学院合肥物质科学研究院 | Method and system for detecting content of metal ions in different forms |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782718A (en) * | 2017-12-06 | 2018-03-09 | 南京先进激光技术研究院 | Portable laser induced breakdown spectroscopy analytical equipment |
-
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- 2018-08-17 CN CN201810939922.7A patent/CN109239054A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782718A (en) * | 2017-12-06 | 2018-03-09 | 南京先进激光技术研究院 | Portable laser induced breakdown spectroscopy analytical equipment |
Non-Patent Citations (2)
| Title |
|---|
| 江天甲: "重金属微污染物(As(Ⅲ),Cr(Ⅵ),Cd(Ⅱ))光谱/电化学检测初探", 《中国博士学位论文全文数据库 工程科技I辑》 * |
| 王园园 等: "基于电极富集的水体重金属LIBS检测灵敏度研究", 《光谱学与光谱分析》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693512A (en) * | 2020-06-15 | 2020-09-22 | 天津大学 | Method for quantitatively detecting heavy metal elements in milk based on laser-induced breakdown spectroscopy |
| CN112161969A (en) * | 2020-10-23 | 2021-01-01 | 中国科学院合肥物质科学研究院 | Method and system for detecting content of metal ions in different forms |
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Application publication date: 20190118 |