CN105092688B - One isotope analysis front device to main component nitrogen, oxygen in air - Google Patents
One isotope analysis front device to main component nitrogen, oxygen in air Download PDFInfo
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- CN105092688B CN105092688B CN201510438623.1A CN201510438623A CN105092688B CN 105092688 B CN105092688 B CN 105092688B CN 201510438623 A CN201510438623 A CN 201510438623A CN 105092688 B CN105092688 B CN 105092688B
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Abstract
The present invention relates to an isotope analysis front device to main component nitrogen, oxygen in air, the air sample collected in sample cell is exported under the supercharging of He gas through sample introduction needle, it is stored in after the steam removed by adsorption trap in air in quantitative loop, then entered under He carrier gas by quantitative loop in the chromatographic column of 5A molecular sieves and separated, then gas isotope mass spectrograph is imported by open type shunting interface after removing water through electric cold-trap and detected.The present invention goes out to sweep function in the increase of sample introduction link, prevents from having an acupuncture treatment and taking needle ring section to penetrate into the influence to test result because of air；Increase blowing function again simultaneously, both maintained the cleaning of the sampling line before acupuncture treatment, the accumulation blocking pipeline because of steam or aerosol particle is avoided again.
Description
Technical field
The present invention relates to an isotope analysis front device to main component nitrogen, oxygen in air.
Background technology
Nitrogen and oxygen are the main constituents of air, and its natural nitrogen concentration accounts for 80%, and oxygen accounts for 17%.Nitrogen is
The main component of organic matter, is the source of all life.Nitrogen has two kinds of stable isotopes of 14N and 15N, and nitrogen isotope is to discriminate between
Its originate such as Atmospheric processes, biological agent and basis of magmatic activity；Oxygen has tri- kinds of stable isotopes of 16O, 17O, 18O, and oxygen is same
Position element is applied in geoscience determine moisture source, environment temperature and atmospheric circulation situation.
Isotope test to nitrogen in gas component uses GC-C-MS methods or GC-MS methods mostly, due in natural gas
Nitrogen content is low or sample strain is small, and the pollution of air is highly susceptible in sample preparation and transfer process, and data are accurate
Obtain difficulty very big；Instrument GasBench-" the online head space skill of continuous stream produced in the market using Thermo Electron Corp.
Art " tests the isotopic ratio of the corresponding gas including water balance, carbonate and air.But having an acupuncture treatment and sampling real
In the operating process of border, the leakage of air and the residual of head space circuit air can influence data accurate.
The content of the invention
In view of above-mentioned, the purpose of the present invention aims to provide one to the nitrogen of main component, oxygen isotope point in air
Front device is analysed, and gas isotope mass spectrometer completes nitrogen, point of oxygen isotope abundance to nitrogen in air and oxygen jointly
Analysis is determined, for research of the developing atmospheric science field to plateau Atmospheric components stable isotope, strengthen to atmospheric chemistry process and
The understanding of interaction relationship between mankind's activity and environment, technical support is provided to region and global change research due.
The object of the present invention is achieved like this：
One isotope analysis front device to main component nitrogen, oxygen in air, mainly includes:Sample bottle, take
Sample pin, pin carry helium tube, blow down valve, adsorption trap, quantitative loop, back-flushing valve, drain A, chromatographic column, remove water trap, drain B, sample
Product gas force open type current divider, with reference to gas force open type current divider, helium carrier gas pressure regulator valve, reference gas nitrogen pressure regulator valve, reference gas oxygen pressure regulation
Valve, gas stable isotope mass spectrograph MS, six contacts of six-way valve：c1、c2、c3、c4、c5、c6.
There are load load and addition two kinds of mode of communicating of inject between six contacts c1, c2, c3, c4, c5, c6 of six-way valve
Switch over：When six-way valve is in load states, contact c2, c1, quantitative loop, the contact of six-way valve of adsorption trap and six-way valve
C4, c3 and drain A are sequentially connected in connected state by quartz capillary, contact c6, c5 and chromatographic column of six-way valve, are gone
Water trap and sample gas force open type current divider are sequentially connected by quartz capillary;When six-way valve is in inject states, six-way valve connects
Point c6, c1 and quantitative loop, the contact c4 of six-way valve, c5, chromatographic column, water trap and sample gas force open type current divider are removed by quartzy capillary
Pipe is sequentially connected.Back-flushing valve is connected with contact c3, c 2 of six-way valve with adsorption trap.
When six-way valve is in load states：Helium route pin by helium carrier gas pressure regulator valve one and carries helium tube introducing sample bottle
In, sample introduction needle, adsorption trap, quantitative loop and six-way valve contact c4, c3 are flowed through successively, are finally discharged by drain A；Another road helium
Enter from the contact c6 of six-way valve, pass sequentially through the contact c5 of six-way valve, chromatographic column, go water trap to enter the shunting of sample gas force open type
Device.When six-way valve is in inject states：Helium route six-way valve contact c6 by pressure regulator valve one and entered, by contact c1,
Contact c4, c5 of quantitative loop and six-way valve flow through chromatographic column, remove water trap, sample gas force open type current divider, finally enter gas by needle-valve
In body stable isotope mass spectrograph MS；Another road helium is entered by helium pressure regulator valve by back-flushing valve, passes through the contact of six-way valve
C3, c2 and adsorption trap, are finally discharged by sample introduction needle mouthful；Helium purge mouthful at blow down valve is in the position of bottleneck of sample bottle, purging
Valve is only opened when sample introduction needle is had an acupuncture treatment and is sampled.
It is an advantage of the invention that：
L sets up purging function：Needle ring section is being had an acupuncture treatment and is taking, by the way of big flow helium gas flow purging sample bottle mouth position
To ensure that sampling environment is clean, it is to avoid air penetrates into the influence to test result.
L uses back-flushing valve：It is the cleaning that sampling line is kept before acupuncture treatment first, does not allow environmental air pollution pipeline；Its
Secondary is that sample is stayed in into sampling path in time after each acupuncture treatment is sampled（Sampling probe and six-way valve）In steam or other gas it is molten
Glue particle is reversely blown out, it is to avoid steam or aerosol particle blocking pipeline.
● the present invention is in structure design by above two form the collection to object gas, the removal of impurity gas and two
The separation and detection for planting elemental gas are integrated in a flow, it is ensured that exempt air in pipeline sample preparation and transfer process
Pollution, while avoiding influence of the test environment to analysis result, improves data accurately, program is easy to control, simple to operate, has
Good value for applications.
Brief description of the drawings
Fig. 1 is air Main Ingredients and Appearance Stable Isotopic Analysis device sampling process schematic diagram of the present invention
Fig. 2 is the present inventionAir is mainIngredient stability isotope analysis test process schematic diagram
In figure：It is anti-that 1- sample bottles, 2- sampling probes, 3- pins carry helium tube, 4- blow down valves, 5- adsorption traps, 6- quantitative loops, 7-
Blowing valve, 8- drain A, 9- chromatographic column, 10- goes water trap, 11- drain B, 12- sample gas force open types current divider, 13- reference gas to open
Formula current divider, 14-He carrier gas pressure regulator valve, 15- reference gas nitrogen pressure regulator valve, 16- reference gas oxygen pressure regulator valve, 17- gases are stable
With position than quality spectrometer, six-way valve（C）Six contacts：c1、c2、c3、c4、c5、c6.
Embodiment
Below, with reference to accompanying drawing, technical scheme is further described again：
As shown in Figure 1-2, an isotope analysis front device to main component nitrogen, oxygen in air, main bag
Include:Sample bottle 1, sampling probe 2, pin carry helium tube 3, blow down valve 4, adsorption trap 5, quantitative loop 6, back-flushing valve 7, drain A8, chromatogram
Post 9, go water trap 10, drain B11, sample gas force open type current divider 12, with reference to gas force open type current divider 13, He carrier gas pressure regulator valve 14,
Reference gas nitrogen pressure regulator valve 15, reference gas oxygen pressure regulator valve 16, six of gas stable isotope mass spectrograph 17 and six-way valve C connect
Point：c1、c2、c3、c4、c5、c6.Adsorption trap 5 is built with adsorbents such as silica wool, magnesium perchlorates（The filler of adsorption trap is with institute
The species of analysis sample is varied from, it is therefore an objective on the premise of analyzed composition is not influenceed, and many removals as far as possible are not analyzed
Composition）；It is the permeable traps of Nafion to remove water trap 10, and sample gas is managed by nafion when using, and outer layer has a sheaf space again, and outer layer is empty
Between keep drying to flow helium purge, the moisture content in sample gas can be along tube wall to the low direction infiltration of concentration and from drain
B11 is discharged, and removes the moisture content in pipe.The desiccation certain to sample gas.
When six-way valve C is in load states, He gas is carried helium tube 3 and introduced by He carrier gas pressure regulator valve 14, a route pin,
The sampled pin 2 of sample gas in sample bottle 1 is carry, enters quantitative loop 6 by adsorption trap 5 and six-way valve C contact c2, c1
Middle storage, completes the collection of sample gas, and unnecessary gas contact c4, c3 through six-way valve C connection is finally put by drain A8
Air discharge.Another road helium is entered by six-way valve C contact c6, by six-way valve C contact c5, chromatographic column 9, goes water trap 10 to enter
Enter in sample gas force open type current divider 12 to maintain the cleaning of system.
When six-way valve C is in inject states, He gas by He carrier gas pressure regulator valve 14, the contact c6 of a route six-way valve C,
C1 connection enters, and He air-flows carry the sample gas stored in quantitative loop 6 successively by six-way valve C contact after quantitative loop 6
C4, c5, chromatographic column 9, go water trap 10 to enter sample gas force open type current divider 12, gas stable isotope mass spectrum is finally imported by needle-valve
Isotope analysis detection is carried out in instrument 17.Another road helium is introduced by helium pressure regulator valve 14 by back-flushing valve 7, passes through six-way valve C
Contact c3, c2 and adsorption trap 5, finally discharged by sampling probe 2, and steam of the accumulation in valve body and sample introduction needle or its
He reversely blows out aerosol particle.
Specific implementation process follows these steps to carry out（By taking the air of indoor collection as an example）：
Ⅰ）Purge set-up procedure：Six-way valve C is placed in load states, blow down valve 4 is opened, while opening back-flushing valve 7, at this moment
The flow all the way introduced by pin load helium tube 3 sweeps 1 mouthful of sample bottle for 12ml/min He air-blowings, with the preceding sample bottle that maintains to have an acupuncture treatment
The cleaning in choma border；A part of connecing by six-way valve C of He gas that the flow all the way imported simultaneously by back-flushing valve 7 is 4ml/min
Point c3, c4 flow through quantitative loop 6, adsorption trap 5, are finally discharged to keep the unimpeded of system by sampling probe 2（If there being pipeline during sampling
Dust or sample itself are dirtier, with sample test increasing number, have dust and block sampling probe and pipeline）, it is a part of logical
Cross drain 8（Current limliting is 0.5-1ml/min helium gas flows herein）Outflow, it is to avoid drain dead volume is present.
Ⅱ）Acupuncture treatment sampling process：Sampling probe 2 closes back-flushing valve 4 and blow down valve 7 while sample bottle 1 is had an acupuncture treatment in place；
At this moment helium carries helium tube 3 by pin and introduces filling sample bottle 1, and under the supercharging of helium, sample gas is flowed with helium by sampling probe 2
Go out, by adsorption trap 5, then mixed airflow washes away and fills sample amounts ring 6.Advantage using gasometry ring is can be with
Tackle different type gaseous sample, it is ensured that the sample total amount of acquirement is consistent, it is ensured that sample has same volume and same pressure
（Drain is set below, and the pressure of gas and atmospheric pressure is consistent in basic guarantee quantitative loop 6）, may so as to evade
The linear problem of presence；Meanwhile, before filling quantitative loop, with sample gas flushing quantitative loop, it is possible to reduce the pollution of sample room.
Ⅲ）Sample test process：After quantitative loop 6 takes sample to finish（General 40S or so）, six-way valve goes to inject shapes
State, the flow all the way imported by six-way valve C contact c6 promotes the sample gas in quantitative loop 6 for 1.5ml/min He gas, enters
5A molecular sieves capillary chromatographic column 9 is separated, then goes after water trap 10 open type for flowing into sample gas to shunt by a nafion
In device 12, the gas componant of separation sequentially enters isotope ratio mass spectrometer 17, distinguishes with reference to gas nitrogen and reference gas oxygen
In the open type current divider 13 for alternately entering reference gas by pressure regulator valve 15, pressure regulator valve 16, the open type current divider 12 of sample gas and reference
The open type current divider 13 of gas is connected by the way that needle-valve and gas are stable by quartz capillary with position than quality spectrometer 17 respectively, passes through gas
Body stabilization completes the isotope abundance detection to nitrogen and oxygen jointly with position than quality spectrometer 17.（If in sample bottle enough
Sample size support repeated sampling, repeat 3 to 7 circulations of above-mentioned steps）
Ⅳ）After sampling terminates, blow down valve 4 and back-flushing valve 7 are opened, sampling probe 2 is extracted immediately, blow down valve 4 is then shut off, is protected
Back-flushing valve 7 is held to open, the flow all the way at this moment imported by back-flushing valve 7 for 4ml/min He gas by six-way valve C contact c3,
C2 flows through adsorption trap 5 and finally discharged by sampling probe 2, maintains sampling probe 2 unobstructed.After pending data collection is completed, start next
Circulation.
Claims (1)
1. an isotope analysis front device to main component nitrogen, oxygen in air, mainly includes:Sample bottle（1）, take
Sample pin（2）, pin carry helium tube（3）, blow down valve（4）, adsorption trap（5）, quantitative loop（6）, back-flushing valve（7）, drain A（8）, chromatogram
Post（9）, remove water trap（10）, drain B（11）, sample gas force open type current divider（12）, with reference to gas force open type current divider（13）, helium carrier gas
Pressure regulator valve（14）, reference gas nitrogen pressure regulator valve（15）, reference gas oxygen pressure regulator valve（16）, gas stable isotope mass spectrograph MS
(17), six-way valve（C）Six contacts：C1, c2, c3, c4, c5, c6, six-way valve（C）Six contact c1, c2, c3, c4, c5,
There is load between c6（load）And addition（inject）Two kinds of mode of communicating are switched over：Six-way valve（C）Six contact c1, c2,
There is load between c3, c4, c5, c6（load）And addition（inject）Two kinds of mode of communicating are switched over：It is characterized in that working as six-way valve
（C）In load states, adsorption trap（5）And six-way valve（C）Contact c2, c1, quantitative loop（6）, six-way valve（C）Contact c4,
C3 and drain A（8）It is sequentially connected by quartz capillary in connected state, six-way valve（C）Contact c6, c5 and chromatographic column
（9）, remove water trap（10）With sample gas force open type current divider（12）It is sequentially connected by quartz capillary;Work as six-way valve（C）In inject
During state, six-way valve（C）Contact c6, c1 and quantitative loop（6）, six-way valve（C）Contact c4, c5, chromatographic column（9）, remove water trap
（10）And sample gas force open type current divider（12）It is sequentially connected by quartz capillary；Back-flushing valve（7）And six-way valve（C）Contact
C3, c 2 and adsorption trap（5）Connection；
Working as six-way valve（C）In load states：Helium passes through helium carrier gas pressure regulator valve（14）One route pin carries helium tube（3）Introduce
Sample bottle（1）In, sampling probe is flowed through successively（2）, adsorption trap（5）, quantitative loop（6）And six-way valve（C）Contact c4, c3, finally by
Drain A（8）Discharge；Another road helium is from six-way valve（C）Contact (c6) enter, pass sequentially through six-way valve（C）Contact
（c5）, chromatographic column（9）, remove water trap（10）Into sample gas force open type current divider（12）；
Working as six-way valve（C）In inject states：Helium passes through pressure regulator valve（14）One route six-way valve（C）Contact（c6）Enter
Enter, pass through contact（c1）, quantitative loop（6）And six-way valve（C）Contact c4, c5 flow through chromatographic column（9）, remove water trap（10）, sample
Gas force open type current divider（12）, finally entered by needle-valve in gas stable isotope mass spectrograph MS (17)；Another road helium passes through helium
Controlled atmosphere pressure valve（14）By back-flushing valve（7）Into passing through six-way valve（C）Contact c3, c2 and adsorption trap（5）, finally by sampling probe
（2）Mouth discharge；Blow down valve（4）The helium purge mouthful at place is in sample bottle（1）Position of bottleneck.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5314827A (en) * | 1989-09-20 | 1994-05-24 | Fisons Plc | Isotopic composition analyzer |
| CN201096664Y (en) * | 2007-10-30 | 2008-08-06 | 邹海平 | Fully automatic maintenance-free sampling pre-processing device |
| CN103743846A (en) * | 2014-01-13 | 2014-04-23 | 中国科学院寒区旱区环境与工程研究所 | Enrichment analyzer for carbon and hydrogen elements in greenhouse gas CH4 |
| CN103940644A (en) * | 2013-01-23 | 2014-07-23 | 中国科学院寒区旱区环境与工程研究所 | Front apparatus for testing hydrogen and oxygen isotopes in water containing salts and organic matters |
| CN104007072A (en) * | 2014-05-05 | 2014-08-27 | 贾金柱 | Escaped-ammonia on-line measure apparatus for denitration reactor |
| CN204925030U (en) * | 2015-07-23 | 2015-12-30 | 中国科学院寒区旱区环境与工程研究所 | Leading device of atmosphere chief ingredient stable isotope analysis |
-
2015
- 2015-07-23 CN CN201510438623.1A patent/CN105092688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5314827A (en) * | 1989-09-20 | 1994-05-24 | Fisons Plc | Isotopic composition analyzer |
| CN201096664Y (en) * | 2007-10-30 | 2008-08-06 | 邹海平 | Fully automatic maintenance-free sampling pre-processing device |
| CN103940644A (en) * | 2013-01-23 | 2014-07-23 | 中国科学院寒区旱区环境与工程研究所 | Front apparatus for testing hydrogen and oxygen isotopes in water containing salts and organic matters |
| CN103743846A (en) * | 2014-01-13 | 2014-04-23 | 中国科学院寒区旱区环境与工程研究所 | Enrichment analyzer for carbon and hydrogen elements in greenhouse gas CH4 |
| CN104007072A (en) * | 2014-05-05 | 2014-08-27 | 贾金柱 | Escaped-ammonia on-line measure apparatus for denitration reactor |
| CN204925030U (en) * | 2015-07-23 | 2015-12-30 | 中国科学院寒区旱区环境与工程研究所 | Leading device of atmosphere chief ingredient stable isotope analysis |
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