CN106970139A - On-line Full atmospheric haze chemical constituent analytical equipment and analysis method - Google Patents
On-line Full atmospheric haze chemical constituent analytical equipment and analysis method Download PDFInfo
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- CN106970139A CN106970139A CN201710399901.6A CN201710399901A CN106970139A CN 106970139 A CN106970139 A CN 106970139A CN 201710399901 A CN201710399901 A CN 201710399901A CN 106970139 A CN106970139 A CN 106970139A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
Abstract
This application discloses a kind of on-line Full atmospheric haze chemical constituent analytical equipment and analysis method, online atmospheric haze chemical constituent analytical equipment includes sample collection device, temperature control box, exhaust pipe, sample feeding pipe, inert carrier gas system.The advantage of the invention is that one is to reduce cost, two be constituent that can comprehensively in quantitative online auto monitoring atmospheric haze, and three be that the other separation of molecular level is realized to thousands of organic matter in atmospheric haze, and strong evidence is provided for accurate source resolution.
Description
Technical field
The application is related to atmospheric haze analysis, more particularly to a kind of on-line Full atmospheric haze chemical constituent analysis dress
Put and analysis method.
Background technology
Atmospheric haze is for human body health, and atmospheric visibility, acid deposition, and climate change all have a significant impact.Reason
The source of haze is solved very dependent on advanced atmospheric haze detecting instrument.The chemical composition of haze is sufficiently complex, mainly includes
Sulfate, nitrate, ammonium salt, thousands of organic matter, DIC, metallic element etc..Complicated composition is for haze
Monitoring analysis is a very big challenge.Monitoring technology has point of offline and on-line monitoring.Off-line monitoring is traditional analysis method.
It gathers atmospheric haze particulate matter on filter membrane.Then, filter membrane (sample) is pre-processed and with GC-MS or HPLC-MS
It is monitored etc. analysis method.The shortcoming of off-line monitoring：1. specimen preprocessing comprehends the error of increase analysis result；2. the week of sample
Phase is long, leads to not flutter and grasps the change of atmospheric haze composition in time, and then can not carry out correct source resolution.So
And, on-line monitoring technique can make up the two shortcomings.Aerosol mass spectrometry technology is quickly grow in nearest twenty or thirty year online
Monitor the technology of atmospheric haze.Wherein, ATOFMS1,2And AMS3It is the widely used two kinds of technologies of comparison.ATOFMS is mainly used in
Monitor organic carbon, DIC, mine dust, metallic element etc. on-line.Its advantage is to monitor the chemical composition of single particle.It
Shortcoming be quantitatively poor.AMS is mainly used in monitoring the most organic matter and inorganic salts in atmospheric haze particle.It compared to
ATOFMS advantage is to quantify, but can not monitor DIC and metallic element.Meanwhile, ATOFMS and AMS can not also by into
Thousand organic matters up to ten thousand are effectively separated and detected.This causes accurate source resolution to turn into a problem.On-line monitoring technique phase
Also there is it for off-line monitoring, that is, expensive, and substantial amounts of data can be produced, this makes data analysis become very
There is challenge.
In a word, on-line monitoring technique is by the trend as future development.In existing widely used on-line monitoring technique
In ATOFMS and AMS, one of shortcoming is that cost is high.They all use vacuum system so that cost is expensive.Shortcoming two be
In both instruments, either of which can not comprehensive quantitative monitoring atmospheric haze component.Shortcoming three is that both are online
Instrument can not be separated and detected to thousands of organic matter, and this is a considerable hurdle of accurate source resolution.
The content of the invention
It is an object of the invention to provide a kind of on-line Full atmospheric haze chemical constituent analytical equipment and analysis method,
Target seeks to solve three big shortcomings in existing on-line monitoring technique, and one is to reduce cost, two be can comprehensively it is quantitative
Line monitors the constituent in atmospheric haze automatically, and three be to realize that molecular level is other to thousands of organic matter in atmospheric haze
Separation, strong evidence is provided for accurate source resolution.
To achieve the above object, the present invention provides following technical scheme：
The embodiment of the present application discloses a kind of on-line Full atmospheric haze chemical constituent analytical equipment, including：
Sample collection device, including supervisor, looped pipeline, described looped pipeline one end are communicated in air, and the other end is provided with filter membrane simultaneously
The supervisor bottom is extended to, is tightly connected between the supervisor and looped pipeline, one end installation that the looped pipeline is communicated in air is set
The first valve is equipped with, the supervisor bottom is connected with vacuum extractor；
Temperature control box, the supervisor is located in the temperature control box；
Exhaust pipe, is communicated in the looped pipeline, and be provided with the second valve；
Sample feeding pipe, is communicated in the supervisor, is opened between the filter membrane and the vacuum extractor, and sets the 4th valve
Door, the sample feeding pipe leads to mass spectrograph or gas chromatography-mass spectrometry；
Inert carrier gas system, including tie point and the second branch road, the tie point lead to the looped pipeline, described second
Branch road leads to the supervisor, and second branch road is opened between the sample feeding pipe and the vacuum extractor.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, the vacuum means are installed
It is equipped with the 3rd valve.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, the supervisor is main for quartz
Pipe, the looped pipeline is quartzy looped pipeline, and the filter membrane is quartz filter.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, the supervisor bottom is formed
There is quartzy porous support, the filter membrane is located on the quartzy porous support.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, the looped pipeline includes mutual
The first branch pipe and the second branch pipe of connection.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, the tie point and the
Two branch roads are respectively arranged with first flow controller and second flow controller.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analytical equipment, first valve, second
Valve, the 3rd valve are ball valve.
Accordingly, a kind of on-line Full atmospheric haze chemical constituent analysis method is also disclosed, is comprised the following steps：
S1, opens the first valve and the 3rd valve, closes the second valve, the 4th valve, and first flow controller controls the
One bypass flow is 0, and second flow controller controls the second bypass flow to be 0, opens the vacuum extractor, and filter membrane collection is big
Gas sample product；
S2, closes the first valve, the second valve, the 3rd valve, opens the 4th valve, first flow controller control first
Bypass flow is 0.2 liter/min, and second flow controller controls the second bypass flow to be 0, and control temperature control box gradually heats up, directly
The sample collected on to filter membrane is not regasified；
S3, closes the first valve, the 3rd valve, the 4th valve, opens the second valve, first flow controller control first
Bypass flow is 0, and second flow controller controls the second bypass flow to be 5 liters/min, and residue is blown away.
It is preferred that, in above-mentioned online atmospheric haze chemical constituent analysis method, the sample feeding pipe leads to the mass spectrum
During instrument, the temperature control box is gradually heating to 600 DEG C, and is kept for 8 minutes at 150 DEG C, 300 DEG C, 450 DEG C, 600 DEG C；It is described enter
When sample pipe leads to gas chromatography-mass spectrometry, the temperature control box is gradually heating to 300 DEG C, and is kept for 10 minutes at 300 DEG C.
It is preferred that, in above-mentioned on-line Full atmospheric haze chemical constituent analysis method, the sample feeding pipe leads to institute
When stating mass spectrograph, analysis first carries out instrumental quantitative analysis step S0 before starting, and quantitative nitric acid ammonium reagent is dropped on the filter membrane,
Close the first valve, the second valve, the 3rd valve, open the 4th valve, first flow controller controls the tie point flow to be
0.2 liter/min, second flow controller controls the second bypass flow to be 0, and temperature control box is warming up to 600 DEG C, obtains characterising mass spectrometry letter
Number.
Compared with prior art, advantage of the invention is that：
1st, low cost.Compared to AMS the and ATOFMS high vacuum systems of current trend, the present invention uses normal pressure system and lazy
Property carrier gas-helium combine so that cost is reduced, and then finally causes instrument price reduction so that pushed away in China
Extensively it is possibly realized.
2nd, using wide.The present invention can be connected with any common mass spectrum or gas chromatography combined with mass spectrometry so that apply model
Enclose very wide.
3rd, the characteristic with separation organic constituentses.All organic matters are mixed compared to AMS and ATOMFS,
The present invention is efficiently separated to thousands of organic compound by temperature-controlled box temperature programming or gas-chromatography,
Make it possible the accurate source resolution based on tracer compound.
4th, quantification.The present invention is compared to existing ATOFMS, and it can easily realize quantification.By in quartz filter
Upper a certain amount of nitric acid ammonium reagent of drop, is heated, reagent gas obtains corresponding signal by mass spectral analysis by heating up.Amount of reagent and
The corresponding relation of corresponding mass signal can realize simply and easily sample amountsization analysis, so as to be laid for quantification source resolution
Basis.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 show on-line Full atmospheric haze chemical constituent analytical equipment sample feeding pipe in the specific embodiment of the invention and connected
Connect structural representation during mass spectrograph；
Fig. 2 show temperature control box heating figure when sample feeding pipe connects mass spectrograph in the specific embodiment of the invention；
Fig. 3 show temperature control box when sample feeding pipe connects gas chromatography-mass spectrometry in the specific embodiment of the invention and heated up
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, detailed retouch is carried out to the technical scheme in the embodiment of the present invention
State, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
With reference to shown in Fig. 1, during the connection mass spectrograph 600 of sample feeding pipe 400, on-line Full atmospheric haze chemical constituent analysis dress
Put, including：
Sample collection device 100, including supervisor 110, looped pipeline 120, one end of looped pipeline 120 are communicated in air, and the other end is set
There is filter membrane 130 and extend to 110 bottoms of supervisor, be tightly connected between supervisor 110 and looped pipeline 120, looped pipeline 120 is communicated in air
One end installation settings has the first valve 140, and 110 bottoms of supervisor are connected with vacuum extractor 160；
Temperature control box 200, supervisor 110 is located in temperature control box 200；
Exhaust pipe 300, is communicated in looped pipeline 120, and be provided with the second valve 310；
Sample feeding pipe 400, is communicated in supervisor 110, is opened between filter membrane 130 and vacuum extractor 160, and sets the 4th valve
Door 410, the sample feeding pipe 400 leads to mass spectrograph 600；
Inert carrier gas system 500, including the branch road 520 of tie point 510 and second, tie point 510 lead to looped pipeline 120,
Second branch road 520 leads to supervisor 110, and the second branch road 520 is opened between sample feeding pipe 400 and vacuum extractor 160.
In another embodiment, mass spectrograph, which can change gas chromatography-mass spectrometry, i.e. sample feeding pipe into, can lead to gas phase
Chromatograph-mass spectrometer, it is same to carry out Atmospheric Chemistry component analysis.
Further, vacuum extractor 160 is provided with the 3rd valve 161.
Further, supervisor 110 is quartz supervisor, and looped pipeline 120 is quartzy looped pipeline, and filter membrane 130 is quartz filter.
Preferably quartz material, but be not limited to quartz material, all materials for not influenceing to test, which all should be worked as, belongs to this Shen
Scope please.
Further, 110 bottoms of supervisor are formed with quartzy porous support 150, and filter membrane 130 is located at quartzy porous support 150
On.
Further, inert carrier gas system 500 is helium system.Looped pipeline 120 include the first branch pipe 121 for being interconnected with
Second branch pipe 122.
Further, the branch road 520 of tie point 510 and second is respectively arranged with first flow controller 511 and second
Amount controller 521.
Further, first valve 140, the second valve 310, the 3rd valve 161 are ball valve.
Preferably ball valve, but be not limited to ball valve, can realize the application using other valves, should all belong to the application
Scope.
Accordingly, on-line Full atmospheric haze chemical constituent analysis method, comprises the following steps：
S1, opens the first valve 140 and the 3rd valve 161, closes the second valve 310, the 4th valve 410, first flow
Controller 511 controls the flow of tie point 510 to be 0, and second flow controller 521 controls the flow of the second branch road 520 to be 0, opens
Vacuum extractor 160, the collection atmospheric sample of filter membrane 130；
S2, closes the first valve 140, the second valve 310, the 3rd valve 161, opens the 4th valve 410, first flow control
Device 511 processed controls the flow of tie point 510 to be 0.2 liter/min, and second flow controller 521 controls the flow of the second branch road 520 to be
0, control temperature control box 200 gradually heats up, until the sample collected on filter membrane 130 is not regasified；
S3, closes the first valve 140, the 3rd valve 161, the 4th valve 410, opens the second valve 310, first flow control
Device 511 processed controls the flow of tie point 510 to be 0, and second flow controller 521 controls the flow of the second branch road 520 to be 5 liters/min,
Residue is blown away.
Further, when sample feeding pipe 400 leads to mass spectrograph 600, temperature control box 200 is gradually heating to 600 DEG C, and 150 DEG C,
Kept for 8 minutes at 300 DEG C, 450 DEG C, 600 DEG C；When sample feeding pipe 400 leads to gas chromatography-mass spectrometry, temperature control box 200 is gradually
300 DEG C are warming up to, and is kept for 10 minutes at 300 DEG C.
If mass spectrum show temperature control box heating figure as analysis tool, ginseng Fig. 2, temperature rises to 600 DEG C, of collection
Grain thing, which is gradually pyrolyzed, analyses into gas, and gas is sent in mass spectrum by inert carrier gas-helium and carries out mass spectral analysis.600 DEG C when
Waiting, sulfate, nitrate, ammonium salt, organic matter, chloride all gasifies, and produce mass signal by Mass Spectrometer Method is used to change
Learn component analysis.Meanwhile, thousands of organic matter utilizes temperature gradient, efficiently separate according to different volatility and
Thermal desorption, the organic substance after separation enters mass spectrum and carries out mass spectral analysis.
If gas chromatography combined with mass spectrometry show temperature control box heating figure as analysis tool, ginseng Fig. 3, temperature rises to
300 DEG C, the particulate matter of collection, which is gradually pyrolyzed, analyses into gas, and gas is sent to gas chromatography combined with mass spectrometry by inert carrier gas-helium
Middle progress compound separation and mass spectral analysis.
Further, when sample feeding pipe 400 leads to mass spectrograph 600, analysis first carries out instrumental quantitative analysis step S0 before starting,
Quantitative nitric acid ammonium reagent is dropped on filter membrane 130, the first valve 140, the second valve 310, the 3rd valve 161 is closed, the is opened
Four valves 410, first flow controller 511 controls the flow of tie point 510 to be 0.2 liter/min, second flow controller 521
It is 0 to control the flow of the second branch road 520, and temperature control box 200 is warming up to 600 DEG C, obtains characterising mass spectrometry signal.
If when instrument detection quantitative analysis is carried out, a certain amount of ammonium nitrate is tried as analysis tool for mass spectrum
Agent is dropped on quartz filter, and temperature control box temperature programming is to 600 DEG C, and reagent Thermal desorption is sent into gas by inert carrier gas-helium
Mass spectrum obtains characterising mass spectrometry signal (m/z 30:NO).Corresponding relation between amount of reagent and characterising mass spectrometry signal can be used for gathering
The quantitative analysis of sample.
It is as follows using said apparatus specific analytical method：
1. sample collection：PM2.5The sampled mouth of sample is collected on filter membrane by supervisor and looped pipeline.PM2.5During sample collection,
First valve opens air collection branch road, and first, second flow controller is set to 0, and the second valve of device clear stream system is closed
Close, the 3rd valve starts to vacuumize, the valve of mass spectrum sampling valve the 4th is closed.The sample collection time is according to weather pollution level
Depending on.Weather is seriously polluted, and acquisition time is just short, such as 5 minutes.The flow of sample collection is 9 liters/min.
2. Thermal desorption and mass spectrum (form and aspect combined gas chromatography mass spectrometry) analysis：After sample collection terminates, temperature control box heating Thermal desorption
Sample.The first valve for gathering sample branch road is closed, and the second valve is closed, and vacuumizes the closing of the valve of branch road the 3rd, mass spectrum sample introduction
The valve of valve the 4th is opened, and temperature control box is started to warm up, while the flow of helium first flow controller rises to 0.2 liter/min from 0
Clock, the flow of second flow controller is still 0.If mass spectrum is used as analysis tool, the heating of temperature control box temperature：30 DEG C -600 DEG C,
Last 40 minutes.Fig. 2 shows mass spectrum as temperature control box temperature temperature-rise period during analysis tool.Have 4 temperature gradients：
150 DEG C, 300 DEG C, 450 DEG C, 600 DEG C, each temperature gradient is kept for 8 minutes.Temperature rises, and the particulate matter of collection is gradually pyrolyzed
Gas is analysed into, gas is sent in mass spectrum by inert carrier gas-helium and carries out mass spectral analysis.When 600 DEG C, sulfate, nitric acid
Salt, ammonium salt, organic matter, chloride all gasifies, and produces mass signal for chemical constituent analysis by Mass Spectrometer Method.Together
When, thousands of organic matter utilizes temperature gradient, has been carried out efficiently separating and Thermal desorption according to different volatility, after separation
Organic substance enter mass spectrum carry out mass spectral analysis.If gas chromatography combined with mass spectrometry is used as analysis tool, temperature control box temperature liter
Temperature：30 DEG C -300 DEG C, last 15 minutes.Fig. 3 shows gas chromatography combined with mass spectrometry as temperature control box temperature during analysis tool
Temperature-rise period.Temperature rises, and the particulate matter of collection, which is gradually pyrolyzed, analyses into gas, and gas is sent to chromatogram by inert carrier gas-helium
Compound separation and mass spectral analysis are carried out in mass spectrometry.When 300 DEG C, organic matter all gasifies, gasification it is organic
Thing mixture carries out compound separation in gas-chromatography, and the mass spectral analysis of single compound is then carried out in mass spectrum.
3. device is cleared up：Temperature control box heats up after Thermal desorption and mass spectral analysis terminate, and carries out device cleaning, is sample next time
Analysis is prepared.First valve is closed, and the second valve is opened, and the 3rd valve is closed, and the valve of mass spectrum sampling valve the 4th is closed, helium
First flow controller flow set is 0, and second flow controller flow set is 5 liters/min, to sample collection and Thermal desorption
System reversely blow and cleared up (relative to sample collection airflow direction), and waste gas is discharged through the second valve from exhaust pipe.
This not vaporized sample carryover (DIC and metal etc.) for remain on filter membrane is blown away.
4. instrument detects quantitative analysis；If mass spectrum is as analysis tool, when instrument detection quantitative analysis is carried out,
A certain amount of nitric acid ammonium reagent is dropped on quartz filter, temperature control box temperature programming is to 600 DEG C, and reagent Thermal desorption leads into gas
Cross inert carrier gas-helium and be sent to mass spectrum acquisition characterising mass spectrometry signal (m/z30:NO).Between amount of reagent and characterising mass spectrometry signal
Corresponding relation can be used for the quantitative analysis of collection sample.
The present invention is a little：
1st, low cost.Compared to AMS the and ATOFMS high vacuum systems of current trend, the present invention uses normal pressure system and lazy
Property carrier gas-helium combine so that cost is reduced, and then finally causes instrument price reduction so that pushed away in China
Extensively it is possibly realized.
2nd, using wide.The present invention can be connected with any common mass spectrum so that application is very wide.
3rd, the characteristic with separation organic constituentses.All organic matters are mixed compared to AMS and ATOMFS,
The present invention is efficiently separated to thousands of organic compound by temperature-controlled box temperature programming or gas-chromatography,
Make it possible in view of the accurate source resolution of tracer compound.
4th, quantification.The present invention is compared to existing ATOFMS, and it can easily realize quantification.By in quartz filter
Upper a certain amount of nitric acid ammonium reagent of drop, is heated, reagent gas obtains corresponding signal by mass spectral analysis by heating up.Amount of reagent and
The corresponding relation of corresponding mass signal can realize simply and easily sample amountsization analysis, so as to be accurate quantification source resolution
Lay the first stone.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Described above is only the embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
1. a kind of on-line Full atmospheric haze chemical constituent analytical equipment, it is characterised in that including：
Sample collection device, including supervisor, looped pipeline, described looped pipeline one end are communicated in air, and the other end is provided with filter membrane and extended
To the supervisor bottom, it is tightly connected between the supervisor and looped pipeline, one end installation settings that the looped pipeline is communicated in air has
First valve, the supervisor bottom is connected with vacuum extractor；
Temperature control box, the supervisor is located in the temperature control box；
Exhaust pipe, is communicated in the looped pipeline, and be provided with the second valve；
Sample feeding pipe, is communicated in the supervisor, is opened between the filter membrane and the vacuum extractor, and the 4th valve of setting,
The sample feeding pipe leads to mass spectrograph or gas chromatography-mass spectrometry；
Inert carrier gas system, including tie point and the second branch road, the tie point lead to the looped pipeline, second branch road
Lead to the supervisor, second branch road is opened between the sample feeding pipe and the vacuum extractor.
2. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that described to take out
Vacuum plant is provided with the 3rd valve.
3. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that the master
Manage and be responsible for for quartz, the looped pipeline is quartzy looped pipeline, the filter membrane is quartz filter.
4. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that the master
Bottom of the tube is formed with quartzy porous support, and the filter membrane is located on the quartzy porous support.
5. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that the pair
Pipe includes interconnected the first branch pipe and the second branch pipe.
6. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that described
One branch road and the second branch road are respectively arranged with first flow controller and second flow controller.
7. on-line Full atmospheric haze chemical constituent analytical equipment according to claim 1, it is characterised in that described
One valve, the second valve, the 3rd valve are ball valve.
8. any described on-line Full atmospheric haze chemical constituent analysis methods of claim 1-7, it is characterised in that including
Following steps：
S1, opens the first valve and the 3rd valve, closes the second valve, the 4th valve, and first flow controller controls first
Road flow is 0, and second flow controller controls the second bypass flow to be 0, opens the vacuum extractor, and filter membrane gathers big gas sample
Product；
S2, closes the first valve, the second valve, the 3rd valve, opens the 4th valve, first flow controller control tie point
Flow is 0.2 liter/min, and second flow controller controls the second bypass flow to be 0, and control temperature control box gradually heats up, until filter
The sample collected on film is not regasified；
S3, closes the first valve, the 3rd valve, the 4th valve, opens the second valve, first flow controller control tie point
Flow is 0, and second flow controller controls the second bypass flow to be 5 liters/min, and residue is blown away.
9. on-line Full atmospheric haze chemical constituent analysis method according to claim 8, it is characterised in that the sample introduction
When pipe leads to the mass spectrograph, the temperature control box is gradually heating to 600 DEG C, and is protected at 150 DEG C, 300 DEG C, 450 DEG C, 600 DEG C
Hold 8 minutes；When the sample feeding pipe leads to gas chromatography-mass spectrometry, the temperature control box is gradually heating to 300 DEG C, and 300
DEG C when keep 10 minutes.
10. on-line Full atmospheric haze chemical constituent analysis method according to claim 8, it is characterised in that it is described enter
When sample pipe leads to the mass spectrograph, analysis first carries out instrumental quantitative analysis step S0 before starting, and quantitative nitric acid ammonium reagent is dropped in
On the filter membrane, the first valve, the second valve, the 3rd valve are closed, the 4th valve, first flow controller control first is opened
Bypass flow is 0.2 liter/min, and second flow controller controls the second bypass flow to be 0, and temperature control box is warming up to 600 DEG C, acquisition
Characterising mass spectrometry signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239080A (en) * | 2020-01-21 | 2020-06-05 | 力合科技（湖南）股份有限公司 | Quality control device and OCEC analytic system |
| CN112986370A (en) * | 2019-12-13 | 2021-06-18 | 中国科学院大连化学物理研究所 | Mass spectrum detection method for trace volatile components |
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