CN106680263A - Sealing device for testing yield of secondary organic aerosol and use method of sealed device - Google Patents
Sealing device for testing yield of secondary organic aerosol and use method of sealed device Download PDFInfo
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- CN106680263A CN106680263A CN201710004674.2A CN201710004674A CN106680263A CN 106680263 A CN106680263 A CN 106680263A CN 201710004674 A CN201710004674 A CN 201710004674A CN 106680263 A CN106680263 A CN 106680263A
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- environment
- injection port
- secondary organic
- organic
- politef
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
- G01N2201/0227—Sealable enclosure
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a sealed device for testing the yield of secondary organic aerosol and a use method of the sealed device. The sealed device comprises a polytetrafluoroethylene environment chamber, wherein the volume of the polytetrafluoroethylene environment chamber is 1m<3>; an ultraviolet lamp and a fan made of a polytetrafluoroethylene material are respectively arranged at two ends of the environment chamber; a sample feeding hole and a sampling hole are formed in the wall of the environment chamber; the sample feeding hole is connected with a spherical glass bulb of which the volume is 30cm<3>; organic matters are blown and volatilized in the glass bulb in a nitrogen blowing mode and are further fed into the environment chamber; subsequently, the fan is powered on; after the organic matters are distributed in balance, the ultraviolet lamp is powered on to excite the organic matters to generate the secondary organic aerosol; the generated secondary organic aerosol is collected by using a Tena*TA solid-phase adsorption tube, is desorbed by using a thermal desorption device, and is fed into a gas chromatograph-mass spectrometer for testing. By adopting the sealed device and the use method, multiple uncertain factors of conventional study experiment can be excluded, pollution to the ambient environment can be avoided, the aerosol distribution uniformity can be maintained, and the experimental environment is not interfered.
Description
Technical field
The present invention relates to the measure device and its measuring method of a kind of big aerosol yield, more particularly to a kind of to determine secondary
The obturator and its measuring method of Organic aerosol yield.
Technical background
Secondary organic aerosol (Secondary organic aerosols, SOA) is atmospheric dust (PM2.5, PM10)
Key component, the impact due to its strong radiation effect and to environment, weather and health is just being increasingly subject to people
Concern.The Secondary Organic gas produced by the volatile organic matter of oxidation and photooxidation biological source and artificial source emission is molten
Glue is the significant contributor of global atmosphere aerosol.Systematically have studied first from McMurry and Grosjean in 1985 organic
Since loss of the thing in Teflon environmental chamber, increasing research worker reports the gas wall balance of organic compound
(GWP) important function of the phenomenon to measure SOA yield.But Organic substance on gas wall distributed constant (τ GWE), environment locular wall
There is dispute in the mutual relation of concentration (Cw) and SOA yield.The chemical complexity and unstable characteristic of secondary organic aerosol
Especially need the instrument analysis technology of real-time online to identify the chemical property of correlation, can so avoid the sample in sample analysis
The impurity brought in many pilot processs such as product sampling, collection, storage, transport and preparation measures and error, SOA yield
Determining generally needs a closed environmental chamber that diffusion occurs for aerosol, both avoids polluting surrounding, and
The uniformity of aerosol extinction can be kept, makes experimental situation interference-free.
The content of the invention
To solve above-mentioned technical problem, the invention provides a kind of obturator for determining secondary organic aerosol yield,
The politef environment room that obturator is, environmental chamber is respectively arranged at the two ends with a uviol lamp and a politef material
Fan, injection port valve on environment locular wall connects a global and simultaneously be connected with injection port, is one on opposite side wall
Individual thief hatch and thief hatch valve；Politef environment building volume is 1m3, global volume is 30cm3。
For ease of operating and observing, polytetrafluoro environmental chamber is equipped with Temperature Humidity Sensor, equipped with humidifier switch, fan and purple
Outer lamp switch.
Injection port valve is equipped with glass cotton with thief hatch valve with politef environment room junction.
Present invention also offers a kind of using method of the sealing device for determining secondary organic aerosol yield, closed is poly-
Dry pure air is filled with air generator inside tetrafluoroethene environmental chamber, Organic substance standard solution is quantitatively injected into sample introduction
Mouthful, Organic substance standard solution is purged opening injection port valve after the completion of volatilization and is entered by the mode purged using nitrogen in glass envelope
Enter environmental chamber, Organic substance is entered after environmental chamber, closes injection port valve；Start fan, the organic compounds distribution of environmental chamber to be entered
After balance, uviol lamp is opened, the secondary organic aerosol produced in environment room is collected with Tenax TA solid phase adsorption pipes, then
Desorption is carried out with thermal analysis apparatus and enters in gas chromatograph-mass spectrometer to be measured.
Preferred Organic substance standard solution is hexanol, n-heptanol, n-octyl alcohol, n-nonyl alcohol, Decanol, positive undecyl alcohol, the moon
Cinnamic alcohol or nitric oxide production dichloromethane standard solution, Organic substance concentration of standard solution is 1000ppm, when not opening uviol lamp, is gathered
Temperature control in tetrafluoroethene environment room takes 1 μ L injection injection ports, with 40ml/min's at 22~26 DEG C with microsyringe
Nitrogen is purged 5 minutes, it is to be purged after the completion of, open injection port valve, injection port is closed after Organic substance is entered in environment room
After valve, start fan 20 seconds, uviol lamp is opened to peak power after 5 minutes, continue the life to excite hydroxyl radical free radical in 10 seconds
Into and ensuing SOA reactions of formation, the collection of sample carried out respectively after 30,90 and 150 minutes, and the external length of thief hatch is
The Tenax TA solid phase adsorptions pipes of 10cm and vacuum pump, with 250cm3The traffic sampling of/min 10 minutes.
There is the politef closed environment of diffusion decline in the measure secondary organic aerosol (SOA) that the present invention is provided
Room, in this environmental chamber, (saturated concentration is less than 100 μ g/m for half volatilization and difficult volatilization organic oxygen-containing compound3) secondary gas it is molten
Glue is produced by photochemical excitation, by measuring its gas wall distribution equilibrium constant (τGWE), so as to detect the yield of SOA, exclude conventional
Many uncertain factors in development test, it is to avoid pollute to surrounding, can keep the uniform of aerosol extinction again
Property, make experimental situation interference-free.In combination with gas chromatography mass spectrometry chromatograph (GCMS), SOA in environmental chamber can be accurately measured
Yield, the SOA produced in above-mentioned environmental chamber can draw air quality and weather bar via three dimensional computer modeling parameterized treatment
Impact of the part to SOA yield in environment.
Description of the drawings
Fig. 1 schematic structural views of the invention
In figure：1- injection port 2- nitrogen 3- glass envelope 4- valve 5- glass cotton 6- uviol lamp 7- Temperature Humidity Sensors
8- humidifiers switch 9- fan swicth 10- ultraviolet violet light switch 11- fan 12- politef environment room 13- thief hatch
Specific embodiment
Below in conjunction with the accompanying drawings the present invention will be further described
Politef environment room environmental room 13 is respectively arranged at the two ends with a uviol lamp 6 and politef material
Fan 11, the injection port valve 4 on environment locular wall connects a global 3 and is connected with injection port 1, is on opposite side wall
One thief hatch 13 and thief hatch valve 4；The product of politef environment chamber body 13 is 1m3, the volume of global 3 is 30cm3。
For ease of operating and observing, polytetrafluoro environmental chamber is equipped with Temperature Humidity Sensor 7, equipped with humidifier switch 8, fan 9
And ultraviolet violet light switch 10.
Injection port valve 4 is equipped with glass cotton 5 with thief hatch valve 4 with the junction of politef environment room 13.
Present invention also offers a kind of using method of the sealing device for determining secondary organic aerosol yield, closed is poly-
Dry pure air is filled with air generator inside tetrafluoroethene environmental chamber 13, Organic substance standard solution is quantitatively injected into
Organic substance standard solution is purged and open after the completion of volatilization injection port valve by sample mouth 1, the mode purged using nitrogen in glass envelope 3
Door 4 enters environmental chamber 13, and Organic substance is entered after environmental chamber 13, closes injection port valve 4；Start fan 7, environmental chamber to be entered
After organic compounds distribution balance, uviol lamp 6 is opened, the secondary organic aerosol Tenax TA solid phase adsorption pipes produced in environment room
It is collected, reusable heat resolver carries out desorption and enter in gas chromatograph-mass spectrometer to be measured.
Preferred Organic substance standard solution is hexanol, n-heptanol, n-octyl alcohol, n-nonyl alcohol, Decanol, positive undecyl alcohol, the moon
Cinnamic alcohol or nitric oxide production dichloromethane standard solution, Organic substance concentration of standard solution is 1000ppm, when not opening uviol lamp, is gathered
Temperature control in tetrafluoroethene environment room takes 1 μ L injection injection ports, with 40ml/min's at 22~26 DEG C with microsyringe
Nitrogen is purged 5 minutes, it is to be purged after the completion of, open injection port valve, injection port is closed after Organic substance is entered in environment room
After valve, start fan 20 seconds, uviol lamp is opened to peak power after 5 minutes, continue the life to excite hydroxyl radical free radical in 10 seconds
Into and ensuing SOA reactions of formation, the collection of sample carried out respectively after 30,90 and 150 minutes, and the external length of thief hatch is
The Tenax TA solid phase adsorptions pipes of 10cm and vacuum pump, with 250cm3The traffic sampling of/min 10 minutes.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, the protection model that protection scope of the present invention should be defined with claim
Enclose and be defined.
Claims (8)
1. it is a kind of determine secondary organic aerosol yield obturator, it is characterised in that obturator be politef environment
Room, the fan for being respectively arranged at the two ends with a uviol lamp and a politef material of environmental chamber, the injection port on environment locular wall
Valve connects a global and is connected with injection port, is a thief hatch and thief hatch valve on opposite side wall.
2. it is according to claim 1 it is a kind of determine secondary organic aerosol yield obturator, it is characterised in that it is described
Politef environment building volume be 1m3。
3. it is according to claim 1 it is a kind of determine secondary organic aerosol yield obturator, it is characterised in that it is described
Global volume be 30cm3。
4. it is according to claim 1 it is a kind of determine secondary organic aerosol yield obturator, it is characterised in that it is described
Polytetrafluoro environmental chamber Temperature Humidity Sensor is housed, equipped with humidifier switch, fan and ultraviolet violet light switch.
5. it is according to claim 1 it is a kind of determine secondary organic aerosol yield obturator, it is characterised in that it is described
Injection port valve is equipped with glass cotton with thief hatch valve with politef environment room junction.
6. the using method of a kind of sealing device for determining secondary organic aerosol yield according to claim 1, it is special
It is that closed politef environment chamber interior air generator is filled with dry pure air to levy, and Organic substance standard is molten
Liquid quantitatively injects injection port, and the mode purged using nitrogen is purged Organic substance standard solution in glass envelope beats after the completion of volatilization
Open injection port valve and enter environmental chamber, Organic substance is entered after environmental chamber, closes injection port valve；Start fan, environment to be entered
After the organic compounds distribution balance of room, uviol lamp is opened, the secondary organic aerosol produced in environment room is inhaled with Tenax TA solid phases
Attached pipe is collected, and reusable heat resolver carries out desorption and enter in gas chromatograph-mass spectrometer to be measured.
7. the using method of a kind of sealing device for determining secondary organic aerosol yield according to claim 6, it is special
Levy is that described Organic substance standard solution is hexanol, n-heptanol, n-octyl alcohol, n-nonyl alcohol, Decanol, positive undecyl alcohol, Laurel
Alcohol or nitric oxide production dichloromethane standard solution.
8. the using method of the sealing device of a kind of measure secondary organic aerosol yield according to claim 6 or 7, its
Temperature control in described politef environment room is characterised by 22~26 DEG C, Organic substance concentration of standard solution is
1000ppm, with microsyringe 1 μ L injection injection ports are taken, and are purged 5 minutes with the nitrogen of 40ml/min, it is to be purged after the completion of, beat
Injection port valve is opened, Organic substance is closed after entering in environment room after injection port valve, start fan 20 seconds, will after 5 minutes
Uviol lamp is opened to peak power, continues the generation to excite hydroxyl radical free radical in 10 seconds and ensuing SOA reactions of formation, sample
Collection was carried out respectively after 30,90 and 150 minutes, and the external length of thief hatch is the Tenax TA solid phase adsorptions pipes and vacuum of 10cm
Pump, with 250cm3The traffic sampling of/min 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004674.2A CN106680263A (en) | 2017-01-04 | 2017-01-04 | Sealing device for testing yield of secondary organic aerosol and use method of sealed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004674.2A CN106680263A (en) | 2017-01-04 | 2017-01-04 | Sealing device for testing yield of secondary organic aerosol and use method of sealed device |
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| Publication Number | Publication Date |
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| CN106680263A true CN106680263A (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710004674.2A Pending CN106680263A (en) | 2017-01-04 | 2017-01-04 | Sealing device for testing yield of secondary organic aerosol and use method of sealed device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008070A (en) * | 2017-11-22 | 2018-05-08 | 沈阳大学 | It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant |
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| CN101632936A (en) * | 2008-07-25 | 2010-01-27 | 中国科学院福建物质结构研究所 | Visible light response catalyst and preparation and application thereof |
| CN204389464U (en) * | 2014-12-17 | 2015-06-10 | 河北科技大学 | A kind of experiment smog box and smoke detection system |
| CN104777258A (en) * | 2014-01-12 | 2015-07-15 | 中国科学院生态环境研究中心 | Vacuum ultraviolet light longitudinal ionization volatile organic matter W type mass spectrometer |
| CN105203502A (en) * | 2015-08-14 | 2015-12-30 | 北京大学 | In-situ online collection analysis meter and method for aerosol carbonaceous components |
| CN205542701U (en) * | 2016-03-23 | 2016-08-31 | 中国科学院生态环境研究中心 | Protonation enhancement mode low pressure vacuum ultraviolet electro -dissociator |
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2017
- 2017-01-04 CN CN201710004674.2A patent/CN106680263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101632936A (en) * | 2008-07-25 | 2010-01-27 | 中国科学院福建物质结构研究所 | Visible light response catalyst and preparation and application thereof |
| CN104777258A (en) * | 2014-01-12 | 2015-07-15 | 中国科学院生态环境研究中心 | Vacuum ultraviolet light longitudinal ionization volatile organic matter W type mass spectrometer |
| CN204389464U (en) * | 2014-12-17 | 2015-06-10 | 河北科技大学 | A kind of experiment smog box and smoke detection system |
| CN105203502A (en) * | 2015-08-14 | 2015-12-30 | 北京大学 | In-situ online collection analysis meter and method for aerosol carbonaceous components |
| CN205542701U (en) * | 2016-03-23 | 2016-08-31 | 中国科学院生态环境研究中心 | Protonation enhancement mode low pressure vacuum ultraviolet electro -dissociator |
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| 方文政: "大气氧化及光氧化挥发性有机物生成二次有机气溶胶的研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 李莹莹等: "植物释放挥发性有机物(BVOC)向二次有机气溶胶(SOA)转化机制研究", 《环境科学》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008070A (en) * | 2017-11-22 | 2018-05-08 | 沈阳大学 | It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant |
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Application publication date: 20170517 |