CN107478857A - A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes - Google Patents
A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes Download PDFInfo
- Publication number
- CN107478857A CN107478857A CN201610402548.8A CN201610402548A CN107478857A CN 107478857 A CN107478857 A CN 107478857A CN 201610402548 A CN201610402548 A CN 201610402548A CN 107478857 A CN107478857 A CN 107478857A
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- CN
- China
- Prior art keywords
- air inlet
- inlet pipeline
- gas
- sample
- sampler
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N2035/1027—General features of the devices
- G01N2035/1034—Transferring microquantities of liquid
- G01N2035/1044—Using pneumatic means
Abstract
The present invention relates to a kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes, including air inlet pipeline, sampling probe and the gas-sample bottle of sealing, the sample introduction end of the output end of the air inlet pipeline and the sampling probe is inserted into the gas-sample bottle, and the sample outlet end of the sampling probe is connected with analysis system.Using the sampler of the present invention, simple and compact for structure, stability and good airproof performance, sampling can be completed in smaller spatial dimension, and is easy to be connected with automatic sampler, analysis system, assemble, dismantle simply, using, it is easy to maintenance.
Description
Technical field
The present invention relates to a kind of sampler, more particularly to a kind of sampling dress for being used to analyze gaseous sample carbon-hydrogen isotopes
Put, and its application.
Background technology
Application of the carbon-hydrogen isotopes in oil-gas geology, environmental science, biomedicine, archaeology, Food Science etc.
Study increasingly extensive, it has also become the irreplaceable means of association area research.Especially in oil-gas geology, geochemical investigation
In, by the carbon-hydrogen isotopes composition characteristic of conventional constituents in researching natural gas, the formation of pair determination natural gas, migrate, gather
And Gas Source Correlation, hydrocarbon generation potential evaluation etc. suffer from important theory value and practical significance.Tested in isotope analysis
Cheng Zhong, no fractionation sampling are most important to the accuracy for ensureing test result.Currently, under continuous flow mode, divide in laboratory
Analyse gaseous sample in each component (carbon dioxide, methane, ethane, etc.) carbon-hydrogen isotopes ratio measurement, mainly use valve injection system
The chromatogram of system-mass spectrometric analysis for isotope instrument, using syringe sampling, is then injected into sample loop.Although simple to operate,
Negative pressure in container can be caused in sampling process, easily cause the fractionation of isotope.Hand gun sample introduction simultaneously, for high-volume gas
For body sample analysis, it is difficult to realize serialization, the automation of test job.In addition, the sampling body that existing sampler is applicable
Product change is smaller, be not particularly suited for gas isotope analysis changes of contents it is big take gas scope.
The content of the invention
To solve above-mentioned problems of the prior art and defect, it is used to analyze gaseous sample the invention provides one kind
The sampler of carbon-hydrogen isotopes, the sample volume of relative broad range is applicable to, being sampled without fractionation for gaseous sample can be achieved, and
And it is simple in construction, it is readily disassembled, assembles, maintains easily, can be with the continuous stream isotope analysis system that generally uses in the market
The supporting combination such as system, automatic sampler, therefore it is particularly conducive to carry out continuous, batch, efficient, accurate gaseous sample isotope
Analysis.
It is an advantage of the invention to provide a kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes, bag
Include air inlet pipeline, sampling probe and the gas-sample bottle of sealing, the sample introduction end of the output end of the air inlet pipeline and the sampling probe is inserted
Enter into the gas-sample bottle, the sample outlet end of the sampling probe is connected with analysis system.
Preferably, the sample outlet end of the sampling probe leads to analysis system by two connects.
Preferably, the sampling probe is hollow steel needle.
According to the sampler of the present invention, carrier gas can be continuously passed through into gas-sample bottle by air inlet pipeline, so that
Stable gas pressure in gas-sample bottle maintains certain level (i.e. more than or equal to atmospheric pressure), so as to avoid gas sample in sampling process
Air pressure in bottle significantly reduces or even is changed into negative pressure state and causes sample gas that isotope fractionation, and then impact analysis result occurs
Accuracy.Meanwhile the sample gas in gas-sample bottle can be directly entered in analysis system from the sample outlet end of sampling probe, avoid shifting
The loss or pollution of sample caused by turning over journey, thus it is easily achieved the serialization of batch sample analysis work, automation.
In the preferred embodiment of the present invention, the output end of the air inlet pipeline is located at entering for the sampling probe
The top at sample end.
By above-mentioned setting, the gas (i.e. carrier gas) that air inlet pipeline can be avoided to export flows directly into the sample introduction end of sampling probe
Cause that sampling can not be realized, and the stroke at the sample introduction end that sampling probe is flowed to by the output end of air inlet pipeline, Neng Gouyan can be extended
Long carrier gas residence time in gas-sample bottle, contributes to carrier gas and sample gas to be sufficiently mixed in gas-sample bottle.
In another preferred embodiment of the present invention, the air inlet pipeline enters including the first air inlet pipeline, second
Air pipe and the threeway for connecting first air inlet pipeline and second air inlet pipeline；
Wherein, the output end of first air inlet pipeline is connected with the first end of the threeway, second air inlet pipe
The input on road is connected with the second end of the threeway, and the output end of second air inlet pipeline is inserted into the gas-sample bottle
In；
Also, after the sample outlet end of the sampling probe is axially through second air inlet pipeline, sequentially pass through the threeway
The second end and the 3rd end be connected with the analysis system；
And the first end of the threeway, the second end and the 3rd end are sealed with seal.
By above-mentioned setting, on the one hand the threeway can play support and fixation to sampling probe and air inlet pipeline,
Another reverse side can provide the airtight chamber of carrier gas, be advantageous to maintain pressure in sampling bottle to remain stable and avoid gas defeated
Pollution or loss during sending.In addition, the sampler structure of above-mentioned setting is more compact, be advantageous to save space.
It should be noted that the output end of second air inlet pipeline is the output end of the air inlet pipeline.
In another preferred embodiment of the present invention, the sampler also includes being used to guide gas from described
The conducting element moved upwards after the output end output of air inlet pipeline.
Preferably, the conducting element is the infundibulate baffle plate being arranged on the sampling probe outer wall, and the infundibulate
The output end that baffle plate is adjacent to the air inlet pipeline is set.
By above-mentioned setting, the gas (i.e. carrier gas) of air inlet pipeline output is no straight after the output end output of air inlet pipeline
The sample introduction end for moving downwardly to sampling probe is connect, but moves up to the top of gas-sample bottle, is filled with the sample gas in gas-sample bottle
Divide after mixing and progressively flow to the sample introduction end of sampling probe, the gas (i.e. carrier gas) so as to avoid air inlet pipeline from exporting flows directly into
The sample introduction end of sampling probe causes that sampling can not be realized, and can extend carrier gas and flow to entering for sampling probe by the output end of air inlet pipeline
The stroke at sample end, carrier gas residence time in gas-sample bottle can be extended, be more conducive to carrier gas and sample gas is filled in gas-sample bottle
Divide mixing.
In another preferred embodiment of the present invention, the seal is graphite grazing pad, more preferably taper
Graphite grazing pad, so as to make sampler realize better seal performance.
In another preferred embodiment of the present invention, flow control valve is provided with first air inlet pipeline,
So as to control carrier gas to enter the flow of gas-sample bottle, to maintain pressure in gas-sample bottle constant.
According to the present invention, described two is logical, threeway, flow control valve are made up of stainless steel material.
In another preferred embodiment of the present invention, a diameter of 1/16 inch of the air inlet pipeline.
In another preferred embodiment of the present invention, the gas-sample bottle includes the bottle and bottle for the connection that is fitted to each other
Lid, the bottle cap are provided with the hole inserted for the output end of the air inlet pipeline, and liner rubber seal.Taken using described
When sampling device is sampled, sampling probe is inserted in gas-sample bottle through liner rubber blanket.
In another preferred embodiment of the present invention, the bottle is transparent glass body.
In the preferred embodiment of the present invention, carrier gas is entered in the gas-sample bottle by the air inlet pipeline,
Enter after being mixed with the sample gas in the gas-sample bottle in the sampling probe, and sample is flowed to out along the sample introduction end of the sampling probe
End.
In the preferred embodiment of the present invention, the carrier gas is inert gas, preferably helium.
In another preferred embodiment of the present invention, carrier gas inputs from the input section of the first air inlet pipeline, successively
Enter by the first air inlet pipeline, threeway and the second air inlet pipeline in gas-sample bottle, mixed with the sample gas in the gas-sample bottle
Enter afterwards in the sampling probe, and sample outlet end is flowed to along the sample introduction end of the sampling probe, afterwards into analysis system.
According to the present invention, carry sample gas using carrier gas and enter in analysis system, being capable of serialization, automatically realization batch
Measure the analysis work of sample, the loss or pollution of sample caused by avoiding transfer process；And due to carrier gas in sampling process
The flow regime of continuous-stable is in sample gas, can avoid the significant changes of air pressure in gas-sample bottle causes sample gas to be fractionated,
And then the accuracy of impact analysis result.
Using the sampler of the present invention, simple and compact for structure, stability and good airproof performance can be in smaller spatial dimensions
It is interior to complete sampling, and be easy to be connected with automatic sampler, analysis system etc., assembling, dismantle simply, using, it is easy to maintenance.
The method analyzed according to the gaseous sample carbon-hydrogen isotopes of the present invention, sample caused by transfer process can be avoided
Loss or pollution, realize serialization, the automation of batch sample analysis work；Simultaneously effective solves syringe sampling space-time
The problem of gas pollution and isotope fractionation, improve the accuracy and analysis efficiency of analysis.
Brief description of the drawings
Fig. 1 is the sampler for being used to analyze gaseous sample carbon-hydrogen isotopes according to an embodiment of the invention
Structural representation.
Fig. 2 is the enlarged drawing of a-quadrant in Fig. 1.
Description of reference numerals：
In Fig. 1,101- first gas pipeline；102- flow control valves；103- second gas pipelines；201- sampling probes；
301- threeways；The first end of 302- threeways；Second end of 302- threeways；3rd end of 303- threeways；401- gas-sample bottles；402- bottles
Lid；403- bottles；
In fig. 2,202- conducting elements.
Embodiment
With reference to non-limiting specific embodiment, the invention will be further described, but protection scope of the present invention is simultaneously
It is not limited to following embodiments.
Embodiment 1
Sampler as shown in Figure 1, including：
First air inlet pipeline 101, a diameter of 1/16 inch, it is provided with flow control valve 102；
Second air inlet pipeline 103；
Connect the threeway 301 of first air inlet pipeline and second air inlet pipeline；
Sampling probe 201, conducting element 202 (such as opening up infundibulate baffle plate) is provided with the outer wall of sampling probe 201,
And conducting element 202 is adjacent to the output end of the second air inlet pipeline 103；
Gas-sample bottle 401, includes the bottle cap 402 and bottle 403 of the connection that is fitted to each other, and bottle cap 402 is provided with and supplies the second air inlet
The hole of the output end insertion of pipeline 103, and liner rubber seal, bottle 403 are transparent glass body, pass through draining in having
(saturated aqueous common salt) takes the sample gas that gas method obtains.
Wherein, the output end of the first air inlet pipeline 101 is passed through with the first end of the threeway 301 of conical graphite sealing gasket sealing
302, it is passed through in the chamber of threeway；The input of second air inlet pipeline 103 is passed through with the threeway of conical graphite sealing gasket sealing
Second end 303, is passed through in the chamber of threeway；The output end of second air inlet pipeline 103 passes through hole and liner rubber on bottle cap 402
Pad is inserted into the middle part of gas-sample bottle 401.
Wherein, the sample introduction end of sampling probe 201 is inserted into the bottom of gas-sample bottle 401, and the sample outlet end of sampling probe 201 passes through vertically
After wearing the second air inlet pipeline 103, the second end 303 and the 3rd end 304 that sequentially pass through threeway 301 are connected with analysis system.
When being sampled, carrier gas He (direction of arrow on the left of along Fig. 1) is passed through (controlling stream of the first air inlet pipeline 101
Speed is in 1ml/min).
Carrier gas He is flowed to the first end 302 of threeway 301 by the output end of the first air inlet pipeline 101, into the chamber of threeway 301
Interior, the second end 303 of threeway 301 is then flowed to, subsequently into the second air inlet pipeline 103；
Then, the output end of carrier gas He from the second air inlet pipeline 103 positioned at the middle part of gas-sample bottle 401 flows out, in conducting element
The top of gas-sample bottle 401 is flowed under 202 guiding function, carrier gas He is flowing to the process of its bottom from the top of gas-sample bottle 401
In be sufficiently mixed with sample gas；
Well-mixed carrier gas He and sample gas flow into the sample introduction end of the sampling probe 201 positioned at the bottom of gas-sample bottle 401, and
Flow to sample outlet end along needle tubing, so as to complete sample gas without fractionation gas production.Carrier gas He and the gaseous mixture of sample gas are (at the top of along Fig. 1
The direction of arrow) flowed out from the sample outlet end of sampling probe 201, connected by two into analysis system, carry out isotope analysis.
It is (full by draining using the mixed gas of carbon dioxide and helium as sample gas (concentration of carbon dioxide is 3%)
And saline solution) take gas method to be full of gas-sample bottle, above-mentioned isotope analysis is carried out, an analysis result is recorded every 3min, will record
5 analysis results be recorded in table 1.
Comparative example 1
It is (full by draining using the mixed gas of carbon dioxide and helium as sample gas (concentration of carbon dioxide is 3%)
And saline solution) take gas method to be full of gas-sample bottle, 1ml syringe is inserted directly into gas-sample bottle and is sampled, by the 1st syringe
Extract followed by the 2nd syringe of insertion to be sampled, the 3rd is inserted into after extraction, by that analogy, altogether using 5 identical rule
The syringe of lattice is sampled, and is then injected separately into analysis system, carries out isotope analysis, and 5 syringes are obtained into analysis knot
Fruit is recorded in table 1.
The isotope analysis result of table 1
It should be noted that embodiment described above is only used for explaining the present invention, do not form to any of the present invention
Limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that word wherein used is descriptive
With explanatory vocabulary, rather than limited vocabulary.The present invention can be made within the scope of the claims by regulation
Modification, and the present invention is revised in without departing substantially from scope and spirit of the present invention.Although the present invention described in it relates to
And specific method, material and embodiment, it is not intended that the present invention is limited to wherein disclosed particular case, on the contrary, this hair
It is bright to can be extended to other all methods and applications with identical function.
Claims (10)
1. a kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes, including air inlet pipeline, sampling probe and the gas of sealing
The sample introduction end of sample bottle, the output end of the air inlet pipeline and the sampling probe is inserted into the gas-sample bottle, the sampling probe
Sample outlet end be connected with analysis system.
2. sampler according to claim 1, it is characterised in that the output end of the air inlet pipeline is located at the sampling
The top at the sample introduction end of pin.
3. sampler according to claim 1 or 2, it is characterised in that the air inlet pipeline include the first air inlet pipeline,
Second air inlet pipeline and the threeway for connecting first air inlet pipeline and second air inlet pipeline；
Wherein, the output end of first air inlet pipeline is connected with the first end of the threeway, second air inlet pipeline
Input is connected with the second end of threeway, and the output end of second air inlet pipeline is inserted into the gas-sample bottle；
Also, after the sample outlet end of the sampling probe is axially through second air inlet pipeline, sequentially pass through the of the threeway
Two ends and the 3rd end are connected with the analysis system；
Also, the first end of the threeway, the second end and the 3rd end are sealed with seal.
4. according to the sampler any one of claim 1-3, it is characterised in that also include being used to guide gas from institute
State the conducting element moved upwards after the output end output of air inlet pipeline.
5. sampler according to claim 4, it is characterised in that the conducting element is to be arranged on the sampling probe outer wall
On infundibulate baffle plate, and the infundibulate baffle plate be adjacent to the air inlet pipeline output end set.
6. according to the sampler any one of claim 3-5, it is characterised in that the seal is graphite grazing
Pad, preferably conical graphite sealing gasket.
7. according to the sampler any one of claim 3-6, it is characterised in that set on first air inlet pipeline
There is flow control valve.
8. according to the sampler any one of claim 1-7, it is characterised in that the gas-sample bottle includes being fitted to each other
The bottle and bottle cap of connection, the bottle cap is provided with the hole inserted for the output end of the air inlet pipeline, and liner rubber blanket is close
Envelope.
9. according to the sampler any one of claim 1-8, it is characterised in that carrier gas is entered by the air inlet pipeline
Enter in the gas-sample bottle, enter after being mixed with the sample gas in the gas-sample bottle in the sampling probe, and along the sampling probe
Sample introduction end flow to the sample outlet end of sampling probe.
10. sampler according to claim 9, it is characterised in that the carrier gas is inert gas, preferably helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402548.8A CN107478857A (en) | 2016-06-08 | 2016-06-08 | A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402548.8A CN107478857A (en) | 2016-06-08 | 2016-06-08 | A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes |
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| Publication Number | Publication Date |
|---|---|
| CN107478857A true CN107478857A (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610402548.8A Pending CN107478857A (en) | 2016-06-08 | 2016-06-08 | A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613136A (en) * | 2018-12-24 | 2019-04-12 | 江苏师范大学 | The method of anaerobic digestion process is judged using carbon stable isotope fractionation ratio |
| CN116026647A (en) * | 2022-12-29 | 2023-04-28 | 环保桥(上海)环境技术有限公司 | Wetland methane sampling device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001183262A (en) * | 1999-12-24 | 2001-07-06 | Shimadzu Corp | Sample collecting needle |
| CN104181247A (en) * | 2014-08-22 | 2014-12-03 | 中国科学院海洋研究所 | Measurement method of nitrogen and oxygen stable isotope of nitrate in seawater |
| CN104634901A (en) * | 2013-11-12 | 2015-05-20 | 中国石油化工股份有限公司 | Gas sample introduction device and application thereof |
-
2016
- 2016-06-08 CN CN201610402548.8A patent/CN107478857A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001183262A (en) * | 1999-12-24 | 2001-07-06 | Shimadzu Corp | Sample collecting needle |
| CN104634901A (en) * | 2013-11-12 | 2015-05-20 | 中国石油化工股份有限公司 | Gas sample introduction device and application thereof |
| CN104181247A (en) * | 2014-08-22 | 2014-12-03 | 中国科学院海洋研究所 | Measurement method of nitrogen and oxygen stable isotope of nitrate in seawater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613136A (en) * | 2018-12-24 | 2019-04-12 | 江苏师范大学 | The method of anaerobic digestion process is judged using carbon stable isotope fractionation ratio |
| CN116026647A (en) * | 2022-12-29 | 2023-04-28 | 环保桥(上海)环境技术有限公司 | Wetland methane sampling device |
| CN116026647B (en) * | 2022-12-29 | 2023-09-29 | 环保桥(上海)环境技术有限公司 | Wetland methane sampling device |
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Application publication date: 20171215 |