CN209117572U - A kind of gaseous metal mercury detection device - Google Patents
A kind of gaseous metal mercury detection device Download PDFInfo
- Publication number
- CN209117572U CN209117572U CN201821756252.7U CN201821756252U CN209117572U CN 209117572 U CN209117572 U CN 209117572U CN 201821756252 U CN201821756252 U CN 201821756252U CN 209117572 U CN209117572 U CN 209117572U
- Authority
- CN
- China
- Prior art keywords
- optical sensor
- gaseous metal
- detection device
- optical fiber
- fibre optical
- 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
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to gaseous metal mercury detection devices, including light source, optical fiber, fibre optical sensor, spectrometer, sealing container, gas permeation tube and computer, the light source is connect by optical fiber with fibre optical sensor, fibre optical sensor is connect by optical fiber with spectrometer, spectrometer and computer communicate to connect, gas permeation tube is connect with sealing container, and fibre optical sensor is set in sealing container.The utility model has the advantages that the structure of the detecting device is compact, flexibility is good, cost economy；It by the analysis to key parameter Influencing Mechanism, realizes to the optimization design of sensor structure and the analysis of error model, improves measurement sensitivity, explore easier, the effective ways for realizing mercury detection in gaseous metal in ambient concentration.
Description
Technical field
The utility model relates to gas detection technology field more particularly to a kind of gaseous metal mercury detection devices.
Background technique
The residence time is long in an atmosphere for gaseous metal mercury, and can in an atmosphere long-distance migration, transport, to Global Ecological
Environment generates adverse effect.For the health of the mankind, probes into and the method effectively monitored, importance are self-evident to be realized to mercury.
Therefore, in atmospheric environment, how to realize highly selective, highly sensitive, easy, the flexible detection to mercury, have very heavy
The meaning wanted.
It is main still to use spectra methods at present for the detection method of gaseous metal mercury.Utilize wet absorption
The acquisition of (liquid containing strong oxidizer such as H2O2, HI-I2, KI-I2 is as absorbing liquid) or solid sorbent (gold, silver are as adsorption tube)
Method is absorbed the gaseous mercury in atmosphere, is measured using spectra methods such as Pressurized sample digestion or cold-vapour atomic absorption methods.This
A little methods are largely effective, but often require to use large-scale instrument, operate relative complex, higher cost.
Summary of the invention
Present invention aims to overcome that the deficiency of above-mentioned existing issue, special optical property based on gold nanoparticle and its
To the affinity of mercury, the mercury detection method based on local surface plasma resonance sensing technology is proposed, design fibre optical sensor, visit
Detection of the rope to gaseous metal mercury in atmospheric environment is realized to the high sensitivity of Mercury In The Air, microenvironment, is online detected in real time
A kind of gaseous metal mercury detection device, is specifically realized by the following technical scheme:
Gaseous metal mercury detection device of the invention, including light source, optical fiber, fibre optical sensor, spectrometer, sealing container,
Gas permeation tube and computer, the light source are connect by optical fiber with fibre optical sensor, and fibre optical sensor passes through optical fiber and light
Spectrometer connection, spectrometer and computer communicate to connect, and gas permeation tube is connect with sealing container, and fibre optical sensor, which is set to sealing, to be held
In device.
The further design of the gaseous metal mercury detection device is that the fibre optical sensor includes gold nanoparticle
With quartz substrate, the gold nanoparticle assembling is on a quartz substrate.
The further design of the gaseous metal mercury detection device is that the core diameter of optical fiber is 550-650 microns,
The optical fiber that length is 24-26 centimetres.
The further design of the gaseous metal mercury detection device is that gas permeation tube introduces the flow velocity of under test gas
For 10LPM.
The further design of the gaseous metal mercury detection device is that gas permeation tube passes through nozzle under test gas
It acts on fibre optical sensor.
The further design of the gaseous metal mercury detection device is that gaseous metal mercury detection device further includes heating
Device, the heating device include reflecting mirror, optical bench, thermocouple and resistance wire, and the fibre optical sensor is installed on reflection
On mirror, the reflecting mirror is mounted on optical bench, and the resistance wire is set on reflecting mirror, and the thermocouple and fibre optical sensor connect
It connects.
Advantages of the present invention is as follows:
The utility model passes through the combination of nanoparticle local surface plasma resonance effect and optical fiber sensing technology, utilizes
It is compact-sized, flexibility is good, the detection device of cost economy, realize detection to mercury metal concentration in gaseous sample；And pass through
Analysis to key parameter Influencing Mechanism is realized to the optimization design of sensor structure and the analysis of error model, improves measurement
Easier, the effective ways for realizing mercury detection in gaseous metal in ambient concentration are explored in sensitivity.
Detailed description of the invention
Fig. 1 is the schematic diagram of gaseous metal mercury detection device.
Fig. 2 is key parameter Influencing Mechanism research approach schematic diagram.
Specific embodiment
With reference to the accompanying drawing to the further explanation of the technical program.
Such as Fig. 1, the gaseous metal mercury detection device of the present embodiment mainly by light source, optical fiber, fibre optical sensor, spectrometer,
Sealing container, gas permeation tube and computer composition.Light source is connect by optical fiber with fibre optical sensor, and fibre optical sensor passes through
Optical fiber is connect with spectrometer, and spectrometer and computer communicate to connect, and gas permeation tube is connect with sealing container, and fibre optical sensor is set
In in sealing container.
Fibre optical sensor includes gold nanoparticle and quartz substrate, and gold nanoparticle assembles on a quartz substrate.This implementation
Example controls the structure feature of gold nanoparticle by regulation dynamics and thermodynamics relevant parameter: utilizing reduction of sodium citrate method
Gold nanosphere is prepared, by controlling the amount of reducing agent, the factors such as speed, mixing speed are added in reducing agent, synthesize different-grain diameter
Gold nanosphere；Gold nanorods are prepared using crystal seed growth method, by seed sized, solution pH value, temperature, gold chloride and CTAB
The parameters such as proportion control, change the size and ratio of gold nanorods.And transmission electron microscope is used, study the gold of synthesis
Nanoparticle shape characteristic and parameter, the pattern variation and gold nanoparticle before and after gold nanoparticle Adsorption of Mercury are in substrate
Fixation, distribution situation.And ultraviolet-visible spectrum is utilized, characterize the LSPR(localized Surface of gold nanoparticle
Plasmon Resonance, LSPR) formant feature.
The core diameter for the optical fiber selected in the present embodiment is 600 microns, the optical fiber that length is 25 centimetres.
The flow velocity that gas permeation tube introduces under test gas is 10LPM.
Such as Fig. 2, the present embodiment is used dynamic air-distributing mode, is acted under test gas by nozzle using gas permeation tube
On fibre optical sensor, the mercury and air gas mixture of various concentration are obtained.After gold nanoparticle Adsorption of Mercury, it can be changed
Optical response utilizes the situation of change of spectrometer record LSPR formant.The structural parameters for changing gold nanoparticle, can obtain
Take influence of the parameters such as different gold nanometer particle grain sizes, ratio, film thickness to measurement；Pass through dynamic air-distributing device and nozzle system simultaneously
System, can act on the gaseous sample of various concentration, flow velocity on Au nanoparticles films, when research concentration, flow velocity respond measurement
Between, the relationship between saturation degree.
Gaseous metal mercury detection device further includes heating device, heating device mainly by reflecting mirror, optical bench, thermocouple with
And resistance wire composition.Fibre optical sensor is installed on reflecting mirror, and reflecting mirror is mounted on optical bench, and resistance wire is set to reflecting mirror
On, thermocouple is connect with fibre optical sensor.
The present embodiment heats base chip by heating device, to study under different temperature condition, gold nano
The optic response of particle.By silicon adhesive, LSPR chip is fixed in mirror surface, reflecting mirror is mounted on optical bench
On, its position can be adjusted on three coordinate directions.Heating device is set in reflecting mirror one side, while can be surveyed by thermocouple
Measure the temperature of LSPR chip.In measurement process, by changing temperature, the temperature change of Au nanoparticles films is monitored, it is studied
The characteristic that LSPR curve varies with temperature.Based on the above results, the nanoparticle shape characteristic most beneficial for measurement is determined, and
Effective sampling method.
The present embodiment generates the gaseous sample of different humidity, combination temperature control unit using water during dynamic air-distributing
Point, study the temperature and humidity characteristic of optical fiber LSPR sensor.The measurement of other common gas is analyzed by research sensor, research
Sensor corrects influence of other disturbing factors to measurement to the selectional feature of mercury measurement, improves detection limit and measurement accuracy.
Based on the studies above as a result, Au nanoparticles films are plated on fiber core layer, it is fabricated to on-line normalization formula optical fiber biography
Sensor.Fibre optical sensor is placed in closed container made of high-density polyethylene material, guarantor on the one hand is played to sensor
On the one hand shield effect is introduced into be measured in container containing mercury gas by gas permeation tube device with stable flow velocity.It is incident
Light source is come in by fiber coupling, and output light is received by fiber spectrometer.
Binding experiment data and temperature and humidity specificity analysis study the pass between the LSPR response of fibre optical sensor and mercury concentration
System obtains the LSPR response data of various concentration sample, establishes Quantitative Analysis Model, realizes the detection to gaseous metal mercury.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (6)
1. a kind of gaseous metal mercury detection device, it is characterised in that hold including light source, optical fiber, fibre optical sensor, spectrometer, sealing
Device, gas permeation tube and computer, the light source connects by optical fiber with fibre optical sensor, fibre optical sensor pass through optical fiber and
Spectrometer connection, spectrometer and computer communicate to connect, and gas permeation tube is connect with sealing container, and fibre optical sensor is set to sealing
In container.
2. mercury detection device in gaseous metal according to claim 1, it is characterised in that the fibre optical sensor includes Jenner
Rice corpuscles and quartz substrate, the gold nanoparticle assembling is on a quartz substrate.
3. mercury detection device in gaseous metal according to claim 1, it is characterised in that the core diameter of optical fiber is 550-650
Micron, the optical fiber that length is 24-26 centimetres.
4. mercury detection device in gaseous metal according to claim 1, it is characterised in that gas permeation tube introduces under test gas
Flow velocity be 10LPM.
5. mercury detection device in gaseous metal according to claim 1, it is characterised in that gas permeation tube will be to by nozzle
Gas is surveyed to act on fibre optical sensor.
6. mercury detection device in gaseous metal according to claim 1, it is characterised in that gaseous metal mercury detection device is also wrapped
Heating device is included, the heating device includes reflecting mirror, optical bench, thermocouple and resistance wire, the fibre optical sensor installation
In on reflecting mirror, the reflecting mirror is mounted on optical bench, and the resistance wire is set on reflecting mirror, and the thermocouple and optical fiber pass
Sensor connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756252.7U CN209117572U (en) | 2018-10-26 | 2018-10-26 | A kind of gaseous metal mercury detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756252.7U CN209117572U (en) | 2018-10-26 | 2018-10-26 | A kind of gaseous metal mercury detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209117572U true CN209117572U (en) | 2019-07-16 |
Family
ID=67202577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821756252.7U Active CN209117572U (en) | 2018-10-26 | 2018-10-26 | A kind of gaseous metal mercury detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209117572U (en) |
-
2018
- 2018-10-26 CN CN201821756252.7U patent/CN209117572U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhao et al. | All-optical hydrogen sensor based on a high alloy content palladium thin film | |
| US4050895A (en) | Optical analytical device, waveguide and method | |
| Bharadwaj et al. | Gold nanoparticle coated U-bend fibre optic probe for localized surface plasmon resonance based detection of explosive vapours | |
| CN107561270B (en) | Use the sensitive immunoassays of coated nano particle | |
| Arnold et al. | Fiber optic ammonia gas sensing probe | |
| Yang et al. | Silver nanotriangle array based LSPR sensor for rapid coronavirus detection | |
| CN109060727B (en) | Dual-channel optical fiber SPR biosensor | |
| Peters et al. | Nucleation and growth rates of homogeneously condensing water vapor in argon from shock tube experiments | |
| Khan et al. | Fiber-optic pulse width modulation sensor for low concentration VOC gas | |
| Guo et al. | Silver nanoparticles doped silica nanocomposites coated on an optical fiber for ammonia sensing | |
| TWI438420B (en) | Self-referencing fiber-optic localized plasmon resonance sensing device and system | |
| Cottat et al. | Localized surface plasmon resonance (LSPR) biosensor for the protein detection | |
| Wang et al. | Design and performances of immunoassay based on SPR biosensor with Au/Ag alloy nanocomposites | |
| Zhu et al. | Localized surface plasmon resonance-based hybrid Au–Ag nanoparticles for detection of Staphylococcus aureus enterotoxin B | |
| Kumar et al. | Recent advances in carbon nanomaterials based SPR sensor for biomolecules and gas detection—A review | |
| CN105115939A (en) | Tapered multimode interference-based high-sensitivity optical fiber methane sensing device | |
| CN102213682B (en) | Method for measuring transmission of interference-insensitive terahertz wave | |
| JP2005257684A (en) | Fixation of chemical or biological sensing molecule to semiconductor nanowire | |
| Prasanth et al. | Metal oxide thin films coated evanescent wave based fiber optic VOC sensor | |
| CN108572141A (en) | Composite enhanced optical fiber biosensor and bioprotein molecular concentration detection method | |
| CN104471378A (en) | Localized surface plasmon resonance mercury detection system and methods | |
| Ma et al. | Study on surface sensitization of g-C3N4 by functioned different aggregation behavior porphyrin and its optical properties | |
| Zhang et al. | Ultrasensitive detection of lead (II) ion by dark-field spectroscopy and glutathione modified gold nanoparticles | |
| CN209117572U (en) | A kind of gaseous metal mercury detection device | |
| TWI684756B (en) | Method and kit of measuring concentration of analyte |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |