CN105136934A - Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere - Google Patents
Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere Download PDFInfo
- Publication number
- CN105136934A CN105136934A CN201510591751.XA CN201510591751A CN105136934A CN 105136934 A CN105136934 A CN 105136934A CN 201510591751 A CN201510591751 A CN 201510591751A CN 105136934 A CN105136934 A CN 105136934A
- Authority
- CN
- China
- Prior art keywords
- communicated
- ccl
- pans
- gas
- chromatographic analysis
- 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.)
- Pending
Links
Abstract
The invention discloses an online gas chromatographic analysis and calibration system for PANs and CC14 in the atmosphere, relates to the field of gas chromatography, can accurately measure the pollution level of PANs in the atmosphere and spatial and temporal variation characteristics thereof, and provides online observation data for deeply revealing the formation mechanisms of an atmosphere photochemical oxidant and secondary particles and reasonably evaluating the influence of the atmosphere photochemical oxidant and the secondary particles on environment. The online gas chromatographic analysis and calibration system for PANs and CC14 in the atmosphere comprises a calibration device, a sampling device, a separation device and a detection device which are communicated in sequence, the calibration device is used for synthesizing PAN and CC14 calibration gas, the sampling device is used for quantitatively collecting environment gas and the synthetic PAN and CC14 calibration gas, the separation device is used for separating PAN, PPN and CC14 target objects in the collected gas, and the detection device is used for detecting the separated target objects and generating an electrical signal; the system is applied for detecting the PAN, PNN and CC14 in the atmosphere.
Description
Technical field
The present invention relates to gas chromatographic analysis technique field, especially relate to PANs and CCl in a kind of air
4online gas chromatographic analysis and calibration system.
Background technology
Peroxyacetyl nitrates has RC (O) OONO
2the general name (PANs) of a series of compounds of structure; Wherein, two dominant species of PANs are Peroxyacetyl nitrate (PAN) and peroxide propionyl nitrate (PPN).
In air, PAN is the component that in this compounds, concentration is the highest, is the important secondary pollution that atmospheric photochemical reaction produces.PAN, owing to not having the contribution of natural primary emission source and stratosphere conveying, in the presence of light, can only be oxidized and NO through volatile organic matter
2reaction produces.With ozone (O
3, part stratosphere O
3can troposphere be transferred to) compare, PAN has lower background concentration (tens pptv are to a hundreds of pptv), is one more suitably atmospheric photochemistry pollution indicator.But PAN is not only typical phytotoxin in air, but also is the stimulant of eyes, causes the possible mutagen of cutaneum carcinoma; In addition, the low-temperature stabilization had due to PAN and the characteristic of high temperature pyrolysis, the PANs that urban area photochemistry produces is once be diffused into middle alto-troposphere, just can sink to remote districts by long range propagation, and again discharge peroxy radical and NOx, therefore be widely regarded as the main source of oxides of nitrogen from far-off regions.
In air, it can provide important scientific basis to the impact of environment on the Forming Mechanism of deep announcement atmosphere light oxygenant and secondary aerosol species and reasonable assessment for the level of pollution of PANs and spatial-temporal characteristics thereof.Therefore, in air, the reliable determination of trace PANs has become the focus that atmosphere environmental chemistry field is paid close attention to, needs development badly and has highly sensitive PANs on-line analysis detection technique.
Summary of the invention
The object of the present invention is to provide PANs and CCl in a kind of air
4online gas chromatographic analysis and calibration system, this system can the level of pollution of PANs and spatial-temporal characteristics thereof in Accurate Determining air, to the Forming Mechanism of deep announcement atmosphere light oxygenant and secondary aerosol species, and reasonable assessment its can provide frequent Always Online" observation data to environmental impact.
The invention provides PANs and CCl in a kind of air
4online gas chromatographic analysis and calibration system, comprising: caliberating device, and described caliberating device is for the synthesis of PAN and CCl
4marked gas; Sampling apparatus, the input end of described sampling apparatus is communicated with the output terminal of ambient atmosphere with described caliberating device respectively, described PAN and CCl that described sampling apparatus synthesizes for the environmental gas in ambient atmosphere described in quantitative collection or described caliberating device
4marked gas; Tripping device, the input end of described tripping device is communicated with the output terminal of described sampling apparatus, and described tripping device is used for PAN, PPN or CCl in the gas gathered in described sampling apparatus
4object is separated; Pick-up unit, the input end of described pick-up unit is communicated with the output terminal of described tripping device, and described pick-up unit is used for detecting the isolated described object of described tripping device and producing electric signal.
Wherein, PANs and CCl in described air
4online gas chromatographic analysis and calibration system, also comprise: signal processing apparatus, the input end of described signal processing apparatus is electrically connected with the output terminal of described pick-up unit, and described signal processing apparatus is used for collecting the described electric signal that described pick-up unit produces and transmitting; Temperature control equipment, described temperature control equipment is electrically connected with described tripping device and described pick-up unit respectively, and described temperature control equipment is for controlling the working temperature of described tripping device and described pick-up unit; Electrical control gear, described electrical control gear is electrically connected with described caliberating device, described sampling apparatus, described tripping device, described pick-up unit, described signal processing apparatus and described temperature control equipment respectively, and described electrical control gear is used for realizing and controlling PANs and CCl in described air
4the automatically working of online gas chromatographic analysis and calibration system; Data display memory storage, described data display memory storage is electrically connected with described signal processing apparatus, described temperature control equipment and described electrical control gear respectively, described data display memory storage is for receiving the described electric signal of described signal processing apparatus transmission, and carry out display storage to described electric signal, and to PANs and CCl in described air
4the control signal of online gas chromatographic analysis and calibration system and status data carry out display and store.
Particularly, described caliberating device comprises gas source device, and described gas source device is communicated with photochemical reaction pond by mass flow controller.
Further, described gas source device comprises NO/CCl
4standard mixture source apparatus, acetone calibrating gas source apparatus and synthesis of air gas source device; Described mass flow controller comprises and described NO/CCl
4the first mass flow controller that standard mixture source apparatus correspondence is communicated with, second mass flow controller that be communicated with corresponding to described acetone calibrating gas source apparatus, and three mass flow controller that be communicated with corresponding to described synthesis of air gas source device.
During practical application, described sampling apparatus comprises: sampling transfer valve, and the input end of described sampling transfer valve is communicated with the output terminal of described ambient atmosphere with described photochemical reaction pond respectively by pipeline; Ten-way valve, the position, a hole of described ten-way valve is communicated with the output terminal of described sampling transfer valve; Quantitative loop, the input end of described quantitative loop is communicated with the position, No. two holes of described ten-way valve, and the output terminal of described quantitative loop is communicated with the position, No. nine holes of described ten-way valve; Gas samping pump, described gas samping pump is communicated with the position, No. ten holes of described ten-way valve.
Wherein, described tripping device is micro-compliant mechanism case, and described micro-compliant mechanism case comprises preseparation chromatography post and main separation chromatography post; The input end of described preseparation chromatography post is communicated with the position, No. three holes of described ten-way valve, and the output terminal of described preseparation chromatography post is communicated with the position, No. six holes of described ten-way valve; The input end of described main separation chromatography post is communicated with the position, No. seven holes of described ten-way valve, and the output terminal of described main separation chromatography post is communicated with described pick-up unit.
Particularly, described preseparation chromatography post is capillary gas chromatographic column; Described main separation chromatography post is capillary gas chromatographic column.
Further, described pick-up unit comprises: detecting device transfer valve, and the input end of described detecting device transfer valve is communicated with the output terminal of described main separation chromatography post; Electron capture detector, the input end of described electron capture detector is communicated with the output terminal of described detecting device transfer valve.
During practical application, PANs and CCl in described air
4online gas chromatographic analysis and calibration system, also comprise: helium feedway, and described helium feedway is communicated with the position, No. eight holes of described ten-way valve by the 4th mass flow controller, and described helium feedway is used for for PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide carrier gas; Nitrogen gas supply device, described nitrogen gas supply device is communicated with the position, No. four holes of described ten-way valve by the 5th mass flow controller, and described nitrogen gas supply device is used for for PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide blowback air; Described nitrogen gas supply device is also communicated with the input end of described detecting device transfer valve by the 6th mass flow controller, and described nitrogen gas supply device is also for being PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide Balance Air; Described nitrogen gas supply device is also communicated with the input end of described electron capture detector by the 7th mass flow controller, and described nitrogen gas supply device is also for being PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide make-up gas.
Wherein, the output terminal in described photochemical reaction pond is also communicated with described ambient atmosphere; The position, No. five holes of described ten-way valve is also communicated with described ambient atmosphere; The emptying end of described detecting device transfer valve is also communicated with described ambient atmosphere.
Relative to prior art, PANs and CCl in air of the present invention
4online gas chromatographic analysis and calibration system have following advantage:
PANs and CCl in air provided by the invention
4in online gas chromatographic analysis and calibration system, comprise the caliberating device, sampling apparatus, tripping device and the pick-up unit that are communicated with successively; Caliberating device is for the synthesis of PAN and CCl
4marked gas, sampling apparatus is used for PAN and CCl of environmental gas in quantitative collection ambient atmosphere or synthesis
4marked gas, tripping device is used for PAN, PPN or the CCl in the gas gathered in sampling apparatus
4object is separated, and pick-up unit is used for detecting isolated object and producing electric signal.Analyze known thus, PANs and CCl in air provided by the invention
4in online gas chromatographic analysis and calibration system, as PAN and CCl of caliberating device synthesis finite concentration scope
4after marked gas, can by sampling apparatus to PAN and CCl synthesized
4marked gas or environmental gas are sampled, and are separated the object in gaseous sample by tripping device, to detect and produce electric signal detect for system calibrating and ambient atmosphere finally by pick-up unit to isolated object.Therefore, PANs and CCl in air provided by the invention
4online gas chromatographic analysis and calibration system, can the level of pollution of PANs and spatial-temporal characteristics thereof in Accurate Determining air, to the Forming Mechanism of deep announcement atmosphere light oxygenant and secondary aerosol species, and reasonable assessment its can provide frequent Always Online" observation data to environmental impact.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
PANs and CCl in the air that Fig. 1 provides for the embodiment of the present invention
4the simplified schematic diagram of the annexation of online gas chromatographic analysis and calibration system;
PANs and CCl in the air that Fig. 2 provides for the embodiment of the present invention
4the structural representation of online gas chromatographic analysis and calibration system;
PANs and CCl in the air that Fig. 3 provides for the embodiment of the present invention
4online gas chromatographic analysis and calibration system are in structural representation during the first duty;
PANs and CCl in the air that Fig. 4 provides for the embodiment of the present invention
4online gas chromatographic analysis and calibration system are in structural representation during the second duty.
Reference numeral:
1-caliberating device; 2-sampling apparatus; 3-tripping device;
4-pick-up unit; 5-signal processing apparatus; 6-temperature control equipment;
7-electrical control gear; The display of 8-data stores dress 101-gas source device;
Put;
9-mass rate control 102-photochemical reaction 103-NO/CCl
4mixing
Device; Pond; Standard Gases body source
Device;
104-acetone calibrating gas 105-synthesis of air gas 91-first mass rate
Source apparatus; Source apparatus; Controller;
92-second mass rate control 93-the 3rd mass rate control 21-samples transfer valve;
Device processed; Device processed;
22-ten-way valve; 23-quantitative loop; 24-gas samping pump;
31-preseparation chromatography post; The main separation chromatography post of 32-; 41-detecting device switches
Valve;
42-electron capture detection 11-helium feedway; 94-the 4th mass rate
Device; Controller;
12-nitrogen gas supply device; 95-the 5th mass rate control 96-the 6th mass rate
Device processed; Controller;
97-the 7th mass rate control 13-ambient atmosphere.
Device processed;
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
PANs and CCl in the air that Fig. 1 provides for the embodiment of the present invention
4the simplified schematic diagram of the annexation of online gas chromatographic analysis and calibration system.
As shown in Figure 1, PANs and CCl in the air that provides of the embodiment of the present invention
4online gas chromatographic analysis and calibration system, comprising: caliberating device 1, and caliberating device 1 is for the synthesis of PAN and CCl
4marked gas; Sampling apparatus 2, the input end of sampling apparatus 2 is communicated with the output terminal of ambient atmosphere 13 with caliberating device 1 respectively, PAN and CCl that sampling apparatus 2 synthesizes for the environmental gas in quantitative collection ambient atmosphere or caliberating device 1
4marked gas; Tripping device 3, the input end of tripping device 3 is communicated with the output terminal of sampling apparatus 2, and tripping device 3 is for PAN, PPN and the CCl in the gas gathered in sampling apparatus 2
4object is separated; Pick-up unit 4, the input end of pick-up unit 4 is communicated with the output terminal of tripping device 3, and pick-up unit 4 is for detecting the isolated object of tripping device 3 and produce electric signal.
Relative to prior art, PANs and CCl in the air described in the embodiment of the present invention
4online gas chromatographic analysis and calibration system have following advantage:
PANs and CCl in the air that the embodiment of the present invention provides
4in online gas chromatographic analysis and calibration system, comprise the caliberating device 1, sampling apparatus 2, tripping device 3 and the pick-up unit 4 that are communicated with successively; Caliberating device 1 is for the synthesis of PAN and CCl
4marked gas, sampling apparatus 2 is for PAN and CCl of the environmental gas in quantitative collection ambient atmosphere 13 or synthesis
4marked gas, tripping device 3 is for PAN, PPN or the CCl in the gas that gathers sampling apparatus 2
4object is separated, and pick-up unit 4 is for detecting isolated object and producing electric signal.Analyze known thus, PANs and CCl in the air that the embodiment of the present invention provides
4in online gas chromatographic analysis and calibration system, when caliberating device 1 synthesizes PAN and CCl of finite concentration scope
4after marked gas, can by sampling apparatus 2 to PAN and CCl synthesized
4marked gas or environmental gas are sampled, and are separated by the object in tripping device 3 pairs of gaseous samples, to detect and produce electric signal detect for system calibrating and ambient atmosphere finally by pick-up unit 4 to isolated object.Therefore, PANs and CCl in the air that provides of the embodiment of the present invention
4online gas chromatographic analysis and calibration system, can the level of pollution of PANs and spatial-temporal characteristics thereof in Accurate Determining air, to the Forming Mechanism of deep announcement atmosphere light oxygenant and secondary aerosol species, and reasonable assessment its can provide frequent Always Online" observation data to environmental impact.
Wherein, in order to improve PANs and CCl in air that the embodiment of the present invention provides further
4the accuracy of online gas chromatographic analysis and calibration system, and the Automated condtrol realizing it, as shown in Figure 1, PANs and CCl in air
4online gas chromatographic analysis and calibration system, can also comprise: the electric signal for producing pick-up unit 4 is collected and the signal processing apparatus 5 transmitted, and the input end of this signal processing apparatus 5 can be electrically connected with the output terminal of pick-up unit 4; For controlling the temperature control equipment 6 of the working temperature of tripping device 3 and pick-up unit 4, this temperature control equipment 6 can be electrically connected with tripping device 3 and pick-up unit 4 respectively; For realizing and controlling PANs and CCl in air
4the electrical control gear 7 of the automatically working of online gas chromatographic analysis and calibration system, this electrical control gear 7 can be electrically connected with caliberating device 1, sampling apparatus 2, tripping device 3, pick-up unit 4, signal processing apparatus 5 and temperature control equipment 6 respectively; For the electric signal that Received signal strength treating apparatus 5 transmits, and display storage is carried out, simultaneously to PANs and CCl in air to this electric signal
4the control signal of online gas chromatographic analysis and calibration system and status data carry out showing the data display memory storage 8 stored, and these data display memory storage 8 can be electrically connected with signal processing apparatus 5, temperature control equipment 6 and electrical control gear 7 respectively.
It should be added that, PANs and CCl in the air provided to make the embodiment of the present invention herein
4the advantages such as online gas chromatographic analysis and calibration system have simply, reliable, convenient and Long-distance Control, said signal processing device 5 can comprise signal amplification board, and the input end of this signal amplification board can be electrically connected with the output terminal of pick-up unit 4, the output terminal of signal amplification board can be electrically connected with the input end that data show memory storage 8; Said temperature control device 6 can comprise heating element, cooling module, thermopair and control element; Above-mentioned electrical control gear 7 can comprise center control panel and control circuit; Above-mentioned data display memory storage 8 can comprise LCDs and industrial computer module, and the input end of this industrial computer module can be electrically connected with the output terminal of signal amplification board, the output terminal of industrial computer module can be electrically connected with LCDs.
PANs and CCl in the air that Fig. 2 provides for the embodiment of the present invention
4the structural representation of online gas chromatographic analysis and calibration system.
Particularly, PAN and CCl in order to make caliberating device 1 can be used in synthesizing finite concentration scope
4marked gas, as shown in Figure 2, caliberating device 1 can comprise gas source device 101, and this gas source device 101 can be communicated with photochemical reaction pond 102 by mass flow controller 9.
Further, as shown in Figure 2, gas source device 101 can comprise NO/CCl
4standard mixture source apparatus 103, acetone calibrating gas source apparatus 104 and synthesis of air gas source device 105; Mass flow controller 9 can comprise and NO/CCl
4the first mass flow controller 91 that standard mixture source apparatus 103 correspondence is communicated with, second mass flow controller 92 that be communicated with corresponding to acetone calibrating gas source apparatus 104, and three mass flow controller 93 that be communicated with corresponding to synthesis of air gas source device 105.
It should be added that, caliberating device 1 can also comprise ultraviolet source and peripheral casing herein, and above-mentioned photochemical reaction pond 102 can be quartzy Dynamic Reaction Cell.Wherein, quartzy Dynamic Reaction Cell can be fixed on the centre position in peripheral casing, and ultraviolet source can be evenly distributed on the box house of quartzy Dynamic Reaction Cell surrounding.Quartz Dynamic Reaction Cell can comprise three road air intake openings, a road thief hatch and a road exhausr port; Three road air intake openings can respectively with three kinds of reacting gas (NO/CCl
4, acetone and synthesis of air) be connected, thief hatch can be communicated with sampling apparatus 2, and exhausr port can directly be connected with exhaust pipe.The specially offered main peak of ultraviolet source can be the ultraviolet light of 285nm characteristic wavelength, thus effectively can ensure PAN and CCl of finite concentration scope
4the dynamics synthesize of marked gas.
The specific works process of caliberating device 1 can be as follows: gas source device 101 is by source of the gas (NO/CCl
4, acetone and synthesis of air) through mass flow controller 9, enter in photochemical reaction pond 102 according to the flow of setting, at wavelength be obtain under the ultraviolet light conditions of 285nm expection concentration PAN marked gas and CCl
4marked gas.
During practical application, PAN and CCl that can be used in quantitative collection to make sampling apparatus 2 and synthesized
4marked gas, as shown in Figure 2, sampling apparatus 2 can comprise: sampling transfer valve 21, and the input end of this sampling transfer valve 21 can be communicated with the output terminal of ambient atmosphere 13 with photochemical reaction pond 102 respectively by pipeline; Ten-way valve 22, the position, a hole of this ten-way valve 22 can be communicated with the output terminal of sampling transfer valve 21; Quantitative loop 23, the input end of this quantitative loop 23 can be communicated with ten-way valve 22 No. two position, hole, and the output terminal of quantitative loop 23 can be communicated with ten-way valve 22 No. nine position, hole; Gas samping pump 24, this gas samping pump 24 can be communicated with ten-way valve 22 No. ten position, hole.
The specific works process of sampling apparatus 2 can be as follows: open sampling transfer valve 21, make it be communicated with ambient atmosphere 13 or photochemical reaction pond 102 and open gas samping pump 24, and gaseous sample is entered in quantitative loop 23 by sampling transfer valve 21.
Wherein, can be used in make tripping device 3 being separated the object in gathered gas, as shown in Figure 2, tripping device 3 can be micro-compliant mechanism case, this micro-compliant mechanism case can be slot type circular chromatography post case, and can comprise preseparation chromatography post 31 and main separation chromatography post 32 in it.The input end of preseparation chromatography post 31 can be communicated with ten-way valve 22 No. three position, hole, and the output terminal of preseparation chromatography post 31 can be communicated with ten-way valve 22 No. six position, hole; The input end of main separation chromatography post 32 can be communicated with ten-way valve 22 No. seven position, hole, and the output terminal of main separation chromatography post 32 can be communicated with pick-up unit 4.
Particularly, preseparation chromatography post 31 can be capillary gas chromatographic column, and main separation chromatography post 32 also can be capillary gas chromatographic column.In addition, tripping device 3 can also comprise external insulation cavity, cabinet shell, temperature control element and heating radiator; Tripping device 3 can be communicated with external device (ED) by the gas circuit hole of cabinet shell, and is controlled by the temperature that refrigeration and the temperature control mode of heating realize micro-compliant mechanism case.
The specific works process of tripping device 3 can be as follows: the gaseous sample in quantitative loop 23 enters preseparation chromatography post 31 in tripping device 3 and main separation chromatography post 32 successively, thus realize the separation to the object in gaseous sample.
Further, can be used in make pick-up unit 4 detecting isolated object and producing electric signal, as shown in Figure 2, pick-up unit 4 can comprise: detecting device transfer valve 41, and the input end of this detecting device transfer valve 41 can be communicated with the output terminal of main separation chromatography post 32; Electron capture detector 42, the input end of this electron capture detector 42 can be communicated with the output terminal of detecting device transfer valve 41.
It should be added that, detecting device transfer valve 41 and sampling transfer valve 21 can be miniature electromagnetic valve group, the mode that this miniature electromagnetic valve group can adopt two solenoid valves and pedestal to form herein; Miniature electromagnetic valve group can comprise two input ends, a public output and the exhausr port of self.
The specific works process of pick-up unit 4 can be as follows: entered in electron capture detector 42 by detecting device transfer valve 41 by the isolated object of tripping device 3, thus the detection of realize target thing, and then realize PAN, PPN and CCl in air
4online gas chromatographic analysis.
During practical application, for the ease of PANs and CCl in air
4recycling of online gas chromatographic analysis and calibration system, as shown in Figure 2, PANs and CCl in air
4online gas chromatographic analysis and calibration system, can also comprise: helium feedway 11, and this helium feedway 11 can be communicated with the position, No. eight holes of ten-way valve 22 by the 4th mass flow controller 94, thus is PANs and CCl in air
4online gas chromatographic analysis and calibration system provide carrier gas; Nitrogen gas supply device 12, this nitrogen gas supply device 12 can be communicated with the position, No. four holes of ten-way valve 22 by the 5th mass flow controller 95, thus is PANs and CCl in air
4online gas chromatographic analysis and calibration system provide blowback air.Meanwhile, nitrogen gas supply device 12 can also be communicated with the input end of detecting device transfer valve 41 by the 6th mass flow controller 96, thus is PANs and CCl in air
4online gas chromatographic analysis and calibration system provide Balance Air; Nitrogen gas supply device 12 can also be communicated with the input end of electron capture detector 42 by the 7th mass flow controller 97, thus is PANs and CCl in air
4online gas chromatographic analysis and calibration system provide make-up gas.
Wherein, in order to make PANs and CCl in air
4online gas chromatographic analysis and calibration system, can not only carry out the demarcate analysis of above-mentioned calibrating gas, can also carry out the detection analysis of ambient atmosphere 13, and as depicted in figs. 1 and 2, the output terminal in photochemical reaction pond 102 can also be communicated with ambient atmosphere 13; The position, No. five holes of ten-way valve 22 also can be communicated with ambient atmosphere 13; The emptying end of detecting device transfer valve 41 also can be communicated with ambient atmosphere 13.
PANs and CCl in the air that Fig. 3 provides for the embodiment of the present invention
4online gas chromatographic analysis and calibration system are in structural representation during the first duty; PANs and CCl in the air that Fig. 4 provides for the embodiment of the present invention
4online gas chromatographic analysis and calibration system are in structural representation during the second duty.
In Fig. 3, the position, No. two holes of ten-way valve 22 is communicated with position, a hole, position, No. four holes is communicated with position, No. three holes, position, No. six holes is communicated with position, No. five holes, position, No. eight holes is communicated with position, No. seven holes, position, No. ten holes is communicated with position, No. nine holes; In Fig. 4, the position, No. three holes of ten-way valve 22 is communicated with position, No. two holes, position, No. five holes is communicated with position, No. four holes, position, No. seven holes is communicated with position, No. six holes, position, No. nine holes is communicated with position, No. eight holes, position, a hole is communicated with position, No. ten holes.
Below in conjunction with PANs and CCl in the air that accompanying drawing 3 and accompanying drawing 4 pairs of embodiment of the present invention provide
4the course of work of online gas chromatographic analysis and calibration system is described in detail.
The first step: the foundation of sampling channel and the preparation of system.The position, each hole of ten-way valve 22 is placed in position shown in Fig. 3 respectively, and the temperature of the micro-compliant mechanism case of tripping device 3 can be set as 5 degree; The temperature of pick-up unit 4 can be set as 40 degree; 4th mass flow controller 94, the 5th mass flow controller 95, the 6th mass flow controller 96 and the 7th mass flow controller 97 are set as required flow respectively; Detecting device transfer valve 41 switches to the output terminal of the 6th mass flow controller 96, and the 6th mass flow controller 96 is communicated with electron capture detector 42.
Second step: PAN and CCl
4the synthesis of marked gas.Opening the wavelength arranged in photochemical reaction pond 102 is 285nm uviol lamp; Open NO/CCl
4standard mixture source apparatus 103, opens the first mass flow controller 91 and controls its flow; Open acetone calibrating gas source apparatus 104, open the second mass flow controller 92 and control its flow; Open synthesis of air gas source device 105, open the 3rd mass flow controller 93 and control its flow; Three kinds of gas uniforms pass in photochemical reaction pond 102, and synthesize PAN and CCl of finite concentration scope
4marked gas.After staking-out work terminates, close uviol lamp, NO/CCl
4standard mixture source apparatus 103, acetone calibrating gas source apparatus 104, synthesis of air gas source device 105 and the first mass flow controller 91, second mass flow controller 92 and the 3rd mass flow controller 93.
3rd step: the collection of gaseous sample.Open sampling transfer valve 21 to calibrating gas (timing signal) or ambient atmosphere (during monitoring); Open gas samping pump 24; Environmental gas in calibrating gas or ambient atmosphere is entered in quantitative loop 23 by sampling transfer valve 21.When completing the collecting work of gaseous sample, close gas samping pump 24.
4th step: the separation of gaseous sample and the detection of object.Rotate ten-way valve 22, make its position, each hole be placed in position shown in Fig. 4 respectively, the helium carrier gas that the 4th mass flow controller 94 exports, the gaseous sample in quantitative loop 23 is delivered in preseparation chromatography post 31, enters in main separation chromatography post 32 subsequently; After being successfully completed separation, object arrives detecting device transfer valve 41 place, and the object after separation is sent in electron capture detector 42 by detecting device transfer valve 41, the detection of realize target thing.Finally, the display being realized data by signal processing apparatus 5 and data display memory storage 8 is stored, and completes on-line automatic separation and detects.
5th step, the purification of tripping device 3 and pick-up unit 4.Rotate ten-way valve 22, its position, each hole is made to be placed in position shown in Fig. 3 respectively, detecting device transfer valve 41 switches to the output terminal of the 6th mass flow controller 96, and the 6th mass flow controller 96 is communicated with electron capture detector 42, make the nitrogen in nitrogen gas supply device 11 enter in electron capture detector 42 through the 6th mass flow controller 96; The direct emptying of gas in main separation chromatography post 32; Meanwhile, nitrogen is entered in ten-way valve 22 by the 5th mass flow controller 95, and enters in preseparation chromatography post 31 through the position, No. four holes of ten-way valve 22, purges it, eventually passes No. five holes position emptying of ten-way valve 22.This operation can ensure the purification of tripping device 3 and pick-up unit 4, also completes the operation that sampling channel is set up simultaneously, for recycling of system is next time ready.
PANs and CCl in the air that the embodiment of the present invention provides
4online gas chromatographic analysis and calibration system, mainly there are following 7 advantages: one, be co-located in same system by caliberating device, pick-up unit and signal transacting and data display memory storage, really can realize a system and can complete on-line automatic demarcation and analysis; Two, the micro-compliant mechanism case of tripping device is slot type loop configuration, compact, and the mode adopting refrigeration to combine with heating carries out temperature control, realize the continuous temperature control of micro-compliant mechanism case, precision can reach ± and 0.1 DEG C, thus the running status of system can be made more steady, there is the Applicable temperature scope that works widely; Three, NO/CCl is utilized
4standard mixture and acetone calibrating gas, can complete PAN and CCl
4synchronous demarcation, and can realize two groups of materials mutually test plus effect, make calibration result more accurately and true; Four, acetone calibrating gas is utilized to carry out the demarcation of PAN, gas general at present can be changed and advertise the mode that liquid acetone carries out demarcating, thus can effectively avoid causing monitoring indoor pollution because of liquid acetone volatilization, and then reduce the harm healthy to operating personnel, also drastically increase the degree of demarcating robotization simultaneously; Five, utilize helium to do carrier gas, the system that drastically increases is to PAN, PPN and CCl in air
4detectability, make it sensitiveer; Six, adopt the mode of miniature electromagnetic valve group to realize the automatic switchover of electrical control, the robotization realizing demarcating and detecting is selected, and realizes pick-up unit simultaneously and selects the robotization when detection of object and its purification; Seven, system run all right, favorable reproducibility, compact, automaticity are high, easy to operate, can meet the observation requirements in various place completely.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. PANs and CCl in an air
4online gas chromatographic analysis and calibration system, is characterized in that, comprising:
Caliberating device, described caliberating device is for the synthesis of PAN and CCl
4marked gas;
Sampling apparatus, the input end of described sampling apparatus is communicated with the output terminal of ambient atmosphere with described caliberating device respectively, described PAN and CCl that described sampling apparatus synthesizes for the environmental gas in ambient atmosphere described in quantitative collection or described caliberating device
4marked gas;
Tripping device, the input end of described tripping device is communicated with the output terminal of described sampling apparatus, and described tripping device is used for PAN, PPN and the CCl in the gas gathered in described sampling apparatus
4object is separated;
Pick-up unit, the input end of described pick-up unit is communicated with the output terminal of described tripping device, and described pick-up unit is used for detecting the isolated described object of described tripping device and producing electric signal.
2. PANs and CCl in air according to claim 1
4online gas chromatographic analysis and calibration system, is characterized in that, also comprises:
Signal processing apparatus, the input end of described signal processing apparatus is electrically connected with the output terminal of described pick-up unit, and described signal processing apparatus is used for collecting the described electric signal that described pick-up unit produces and transmitting;
Temperature control equipment, described temperature control equipment is electrically connected with described tripping device and described pick-up unit respectively, and described temperature control equipment is for controlling the working temperature of described tripping device and described pick-up unit;
Electrical control gear, described electrical control gear is electrically connected with described caliberating device, described sampling apparatus, described tripping device, described pick-up unit, described signal processing apparatus and described temperature control equipment respectively, and described electrical control gear is used for realizing and controlling PANs and CCl in described air
4the automatically working of online gas chromatographic analysis and calibration system;
Data display memory storage, described data display memory storage is electrically connected with described signal processing apparatus, described temperature control equipment and described electrical control gear respectively, described data display memory storage is for receiving the described electric signal of described signal processing apparatus transmission, and display storage is carried out, simultaneously to PANs and CCl in described air to described electric signal
4the control signal of online gas chromatographic analysis and calibration system and status data carry out display and store.
3. PANs and CCl in air according to claim 1 and 2
4online gas chromatographic analysis and calibration system, is characterized in that, described caliberating device comprises gas source device, and described gas source device is communicated with photochemical reaction pond by mass flow controller.
4. PANs and CCl in air according to claim 3
4online gas chromatographic analysis and calibration system, is characterized in that, described gas source device comprises NO/CCl
4standard mixture source apparatus, acetone calibrating gas source apparatus and synthesis of air gas source device;
Described mass flow controller comprises and described NO/CCl
4the first mass flow controller that standard mixture source apparatus correspondence is communicated with, second mass flow controller that be communicated with corresponding to described acetone calibrating gas source apparatus, and three mass flow controller that be communicated with corresponding to described synthesis of air gas source device.
5. PANs and CCl in air according to claim 3
4online gas chromatographic analysis and calibration system, is characterized in that, described sampling apparatus comprises:
Sampling transfer valve, the input end of described sampling transfer valve is communicated with the output terminal of described ambient atmosphere with described photochemical reaction pond respectively by pipeline;
Ten-way valve, the position, a hole of described ten-way valve is communicated with the output terminal of described sampling transfer valve;
Quantitative loop, the input end of described quantitative loop is communicated with the position, No. two holes of described ten-way valve, and the output terminal of described quantitative loop is communicated with the position, No. nine holes of described ten-way valve;
Gas samping pump, described gas samping pump is communicated with the position, No. ten holes of described ten-way valve.
6. PANs and CCl in air according to claim 5
4online gas chromatographic analysis and calibration system, is characterized in that, described tripping device is micro-compliant mechanism case, and described micro-compliant mechanism case comprises preseparation chromatography post and main separation chromatography post;
The input end of described preseparation chromatography post is communicated with the position, No. three holes of described ten-way valve, and the output terminal of described preseparation chromatography post is communicated with the position, No. six holes of described ten-way valve;
The input end of described main separation chromatography post is communicated with the position, No. seven holes of described ten-way valve, and the output terminal of described main separation chromatography post is communicated with described pick-up unit.
7. PANs and CCl in air according to claim 6
4online gas chromatographic analysis and calibration system, is characterized in that, described preseparation chromatography post is capillary gas chromatographic column; Described main separation chromatography post is capillary gas chromatographic column.
8. PANs and CCl in air according to claim 6
4online gas chromatographic analysis and calibration system, is characterized in that, described pick-up unit comprises:
Detecting device transfer valve, the input end of described detecting device transfer valve is communicated with the output terminal of described main separation chromatography post;
Electron capture detector, the input end of described electron capture detector is communicated with the output terminal of described detecting device transfer valve.
9. PANs and CCl in air according to claim 8
4online gas chromatographic analysis and calibration system, is characterized in that, also comprises:
Helium feedway, described helium feedway is communicated with the position, No. eight holes of described ten-way valve by the 4th mass flow controller, and described helium feedway is used for for PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide carrier gas;
Nitrogen gas supply device, described nitrogen gas supply device is communicated with the position, No. four holes of described ten-way valve by the 5th mass flow controller, and described nitrogen gas supply device is used for for PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide blowback air;
Described nitrogen gas supply device is also communicated with the input end of described detecting device transfer valve by the 6th mass flow controller, and described nitrogen gas supply device is also for being PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide Balance Air;
Described nitrogen gas supply device is also communicated with the input end of described electron capture detector by the 7th mass flow controller, and described nitrogen gas supply device is also for being PANs and CCl in described air
4online gas chromatographic analysis and calibration system provide make-up gas.
10. PANs and CCl in air according to claim 8
4online gas chromatographic analysis and calibration system, is characterized in that, the output terminal in described photochemical reaction pond is also communicated with described ambient atmosphere;
The position, No. five holes of described ten-way valve is also communicated with described ambient atmosphere;
The emptying end of described detecting device transfer valve is also communicated with described ambient atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591751.XA CN105136934A (en) | 2015-09-16 | 2015-09-16 | Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591751.XA CN105136934A (en) | 2015-09-16 | 2015-09-16 | Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105136934A true CN105136934A (en) | 2015-12-09 |
Family
ID=54722359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510591751.XA Pending CN105136934A (en) | 2015-09-16 | 2015-09-16 | Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105136934A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007026A (en) * | 2019-04-19 | 2019-07-12 | 中国科学院生态环境研究中心 | Trace nitrogen oxides detection method and device in a kind of atmosphere |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591406A (en) * | 1993-09-17 | 1997-01-07 | Shimadzu Corporation | Automatic exhaust gas analyzer for an internal combustion engine |
| CN101329228A (en) * | 2008-07-29 | 2008-12-24 | 北京大学 | Peroxy acyl radical nitric acid lipid substance sampling system and detection method |
| CN101424603A (en) * | 2008-12-11 | 2009-05-06 | 北京大学 | PAN gas generation system and method |
| CN101561422A (en) * | 2009-04-30 | 2009-10-21 | 北京大学 | On-line monitoring system for concentration of acetylperoxide nitrate |
| CN205015315U (en) * | 2015-09-16 | 2016-02-03 | 中国科学院生态环境研究中心 | Online gas chromatograph of PANs and CCl4 and calibration system in atmosphere |
-
2015
- 2015-09-16 CN CN201510591751.XA patent/CN105136934A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591406A (en) * | 1993-09-17 | 1997-01-07 | Shimadzu Corporation | Automatic exhaust gas analyzer for an internal combustion engine |
| CN101329228A (en) * | 2008-07-29 | 2008-12-24 | 北京大学 | Peroxy acyl radical nitric acid lipid substance sampling system and detection method |
| CN101424603A (en) * | 2008-12-11 | 2009-05-06 | 北京大学 | PAN gas generation system and method |
| CN101561422A (en) * | 2009-04-30 | 2009-10-21 | 北京大学 | On-line monitoring system for concentration of acetylperoxide nitrate |
| CN205015315U (en) * | 2015-09-16 | 2016-02-03 | 中国科学院生态环境研究中心 | Online gas chromatograph of PANs and CCl4 and calibration system in atmosphere |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007026A (en) * | 2019-04-19 | 2019-07-12 | 中国科学院生态环境研究中心 | Trace nitrogen oxides detection method and device in a kind of atmosphere |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102445442B (en) | Intelligent general type mercury measuring device and detection method thereof | |
| EP2876893A1 (en) | Cloud-based monitoring apparatus | |
| CN104201086B (en) | A kind of molecular ion reaction substance spectra system and molecular ion reaction, cleaning method | |
| CN106770810A (en) | Online portable gas chromatograph and environment monitoring device | |
| CN103454383A (en) | Dynamic response performance test system for gas sensor | |
| CN106053404A (en) | A portable multi-waveband fluorescence detection trace compound analyzer | |
| CN204389458U (en) | A kind of gas chromatographicanalyzer for analyzing sulfur hexafluoride decomposition product | |
| JP5859011B2 (en) | Extraction method and system for monitoring the presence of phosphate esters in jet fuel | |
| CN205015315U (en) | Online gas chromatograph of PANs and CCl4 and calibration system in atmosphere | |
| US4442353A (en) | High-precision method and apparatus for in-situ continuous measurement of concentrations of gases and volatile products | |
| CN108181255A (en) | A kind of film microphony multicomponent Modular gas analytical equipment | |
| CN102915624A (en) | Detecting device and detecting method of fuel gas alarm | |
| CN104198461B (en) | Industrial process gas analyzer based on Raman effect | |
| CN105136934A (en) | Online gas chromatographic analysis and calibration system for PANs and CC14 in atmosphere | |
| CN202041512U (en) | Analysis device | |
| CN108956580A (en) | A kind of Portable element analyzer can be used for field exploration | |
| CN203367224U (en) | Normal pressure direct ionization mass spectrum device of concealed ion source | |
| CN101118215A (en) | Non-dispersed infra-red spectrometry method suitable for wide environmental temperature range | |
| CN106525818B (en) | Based on multiple database support and the modified LIBS active agent analysis method of too many levels | |
| CN203396758U (en) | Novel wide-range hydrogen flame ionization detector | |
| CN202599961U (en) | Three-chamber integrated on-line analysis system | |
| CN109596540A (en) | Gas phase molecular absorption spectrometer with redundancy function of temperature control | |
| CN112362721B (en) | Device and method for detecting sulfur isotopes in gas in continuous flow mode | |
| CN202869981U (en) | Constant temperature steam generating sampling system | |
| CN206638634U (en) | Online portable gas chromatograph and environment monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151209 |
|
| RJ01 | Rejection of invention patent application after publication |