CN106644619A - Portable water-soluble gas static headspace outdoor sampling device - Google Patents
Portable water-soluble gas static headspace outdoor sampling device Download PDFInfo
- Publication number
- CN106644619A CN106644619A CN201710031281.0A CN201710031281A CN106644619A CN 106644619 A CN106644619 A CN 106644619A CN 201710031281 A CN201710031281 A CN 201710031281A CN 106644619 A CN106644619 A CN 106644619A
- Authority
- CN
- China
- Prior art keywords
- main body
- valve
- gas
- water
- lid
- 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
- 238000005070 sampling Methods 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000005273 aeration Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 17
- 239000011148 porous material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000005276 aerator Methods 0.000 abstract 3
- 239000007789 gas Substances 0.000 description 35
- 238000000034 method Methods 0.000 description 15
- 239000011261 inert gas Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- OKTJSMMVPCPJKN-NJFSPNSNSA-N Carbon-14 Chemical compound [14C] OKTJSMMVPCPJKN-NJFSPNSNSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 238000003891 environmental analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001785 headspace extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
- G01N2001/2238—Sampling from a closed space, e.g. food package, head space the gas being compressed or pressurized
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a portable water-soluble gas static headspace outdoor sampling device. The portable water-soluble gas static headspace outdoor sampling device comprises a main body and a cover body, wherein the main body is of a hollow cylinder structure with an opening at the upper end, and the cover body is detachably sealed at the opening position of the main body; the cover body is provided with a first valve communicated with the interior of the main body; an aerator pipe and an airbag are arranged at the inner bottom of the main body, and a plurality of air holes are formed in the aerator pipe; and the side wall of the main body is provided with three second valves, and the three second valves are respectively communicated with the aerator pipe, the airbag and the inner bottom of the main body. The portable water-soluble gas static headspace outdoor sampling device has the beneficial effects that: 1, the structure is simple, the operation is convenient, the weight is light, the transportation is facilitated, and the cost is low; 2, the device is very suitable for extracting a great number of water-soluble trace gas in the field; and 3, the weaknesses of the traditional headspace bottle that the gas cannot be completely extracted due to the vacuum formed when in vacuumizing can be solved.
Description
Technical field
The present invention relates to environmental analysis field, and in particular to dissolved gas Static Headspace field sampling in portable water sets
It is standby.
Background technology
Headspace technique is gas extraction technology, and general principle is that measured matter is two equal in solution-air or vapor solid
Weighing apparatus, current existing headspace technique includes Static Headspace method and Dynamic headspace method, is a kind of micro volatilization of simple and reliable measure
Property compound analysis method, Static Headspace method is the gas in a closed container, above sample therein and sample
Balance is reached, the technology that overhead gas are measured directly is extracted.At present the device of existing Static Headspace method is relatively simple, leads to
Used as closed system, built-in sample rocks a period of time, after gas balance in bottle to the conventional vial for having silica gel dottle pin piece lid
The gas of head space is taken, rapid injecting chromatograph analysis, such ml headspace bottle specification typically there are the different rule of 10～1000ml
Lattice, but there is also some problems, such as：Easily cause air pressure change in bottle when the 1st, being evacuated；2nd, gas sample amount is few, it is impossible to meet certain
The requirement of a little trace gas samplings, such as determines the carbon 14 of dissolubility CO2 in water body, Chinese Academy of Sciences's earth environment research in Xi'an
Institute's accelerator mass spectrometry center needs 1mgC, U.S. Beta laboratories to need 0.5mgC, in the river that HCO3- concentration is 1～2mol/L
In water, need to carry out head space with the head space volume of 10L water bodys and 3L that sample size could be met, not yet there is Static Headspace device at present
Reach requirement.Dynamic headspace method is continuous flowing in gas to its upper with the difference of Static Headspace method, and flow gas
Body out, tests escaping gas after being collected with collection device.And another kind of repeatedly head space extraction technique and Dynamic headspace skill
Art is similar, but it is that distribution is realized.The shortcoming of Dynamic headspace or multiple head space is that the instrument and equipment of 1, needs is complicated,
It is not easy to field sampling operation；2nd, the gas of purging typically uses inert gas (such as argon gas, nitrogen), and the gas flow of needs is more,
It is difficult to collect, stores, transports, and it is relatively costly；3rd, to be consistent in sampling process air blowing flow rates demand, otherwise affect sampling
Quality, accuracy of instrument is required and operation difficulty is larger.
The content of the invention
In sum, in order to overcome the deficiencies in the prior art, the technical problem to be solved to be to provide portable
Dissolved gas Static Headspace field sampling equipment in water.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：Dissolved gas Static Headspace field in portable water
Sample devices, including main body and lid, the main body is the hollow cylinder structure of upper end open, and the lid is removably sealed
At the aperture position of the main body；The first valve of the body interior is communicated with the lid；In the main body
Inner bottom part is provided with aeration tube and air bag, and the aeration tube is provided with multiple pores；The side wall of the main body is provided with three second
Valve, three second valves are respectively communicated with the bottom in the aeration tube, the air bag and the main body.
The invention has the beneficial effects as follows：
1st, simple structure, easy to operate, it is light to be easy to transport, low cost；
2nd, it is especially suitable for field and extracts dissolubility trace gas in water in a large number；
3rd, solve when traditional ml headspace bottle is evacuated and form vacuum, the shortcoming that gas can not be extracted completely.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Further, first valve is provided with three, and sets respectively in the outlet of two first valves wherein
There are drying tube and air gauge.
It is using the beneficial effect of above-mentioned further scheme：Collect dry sample；Air pressure inside supervision subjectses.
Further, the side wall of the main body is provided with the graduation mark for reading its internal gas volume.
It is using the beneficial effect of above-mentioned further scheme：Grasp the change of gas volume in main body.
Further, the lid is removably sealed at the aperture position of the main body by flange bolt, and institute
State and be provided with sealing ring between lid and the body top.
Further, the aeration tube is arranged relative to the inclined bottom surface of the main body.
Further, the angle between the bottom surface of the aeration tube and the main body is 10 °.
It is using the beneficial effect of above-mentioned further scheme：Aeration tube can make bubble become less, increase inert gas
Contact with water body, so as to accelerate water in dissolved gas enter body top head space, accelerate balance.
Description of the drawings
Fig. 1 is that the overall structure of the present invention is illustrated.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, main body, 2, lid, the 3, first valve, 4, aeration tube, 5, air bag, the 6, second valve, 7, drying tube, 8, air pressure
Table, 9, graduation mark, 10, flange bolt.
Specific embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
As shown in figure 1, dissolved gas Static Headspace field sampling equipment in portable water, including main body 1 and lid 2,
The main body 1 is the hollow cylinder structure of upper end open, and the side wall of the main body 1 is provided with the quarter for reading its internal gas volume
Degree line 9.The lid 2 is removably sealed at the aperture position of the main body 1 by flange bolt 10, and the lid
Sealing ring is provided between 2 and the top of the main body 1.The first valve 3 being communicated with the lid 2 inside the main body 1.
First valve 3 is provided with three, and it is gentle to be respectively equipped with drying tube 7 in the outlet of two first valves 3 wherein
Pressure table 8.
Aeration tube 4 and air bag 5 are provided with the inner bottom part of the main body 1.The aeration tube 4 is provided with multiple pores, the exposure
Tracheae is arranged relative to the inclined bottom surface of the main body.Angle between the bottom surface of the aeration tube 4 and the main body 1 is 10 °.
The side wall of the main body 1 is provided with three the second valves 6, and three second valves 6 are respectively communicated with the aeration tube 4, described
Bottom in air bag 5 and the main body 1.
The step of dissolubility CO2 is extracted in water body is extracted using the device be broadly divided into Four processes：1st, fetch water, 2, top
Sky, 3, pumping, 4, draining, it is specific as follows：
1st, fetch water
Water intaking process is water body example to be filled into main body 1.In order to anti-water-stop body enters air gauge 8 during this, by even
First valve 3 of logical air gauge 8 is closed；In order to anti-water-stop body enters drying tube 7, the first valve 3 of connection drying tube 7 is closed
Close；In order to anti-water-stop body flows out from aeration tube 4, the second valve 6 of connection aeration tube 4 is closed；To prevent gas from entering gas
In capsule 5, the second valve 6 of communicated air bags 5 is closed.Then the second valve 6 of the connection inner bottom part of main body 1 is opened, and is passed through
Silicone tube is connected with water pumper,；The first valve 3 for being not connected to drying tube 7 and aeration tube 4 is opened, and connects a silicone tube；Open
Water body is entered in main body 1 from corresponding second valve 6 after dynamic water pumper, until water body is filled after the main body 1 of top from being not connected to drying tube 7
Discharge with the first valve 3 of aeration tube 4, weak vibrations main body 1 can be by the bubble in it all from being not connected to drying tube 7 and aeration
First valve 3 of pipe 4 is discharged.Treat that the water body volume discharged from the first valve 3 for being not connected to drying tube 7 and aeration tube 4 exceedes master
Water pumper can be closed after 3 times of the inner volume of body 1, the first valve 3 and company for being not connected to drying tube 7 and aeration tube 4 is simultaneously closed off
Second valve 6 of the inner bottom part of logical main body 1, now full of not in contact with the water body example for crossing air in main body 1.
2nd, head space
Head space process is inert gas to be filled into main body 1, while the water body of same volume is discharged, so as in main body 1
The head space of certain volume is formed at top.Inert gas gas cylinder is connected by silicone tube with the second valve 6 of connection aeration tube 4,
Open the second valve 6 for being then turned on connecting the inner bottom part of main body 1 after gas cylinder.Now inert gas is entered from corresponding second valve 6,
Then the head space of the internal upper part of main body 1 is reached after being fully contacted by aeration tube 4 and water body, will be from even with the water of the same volume of gas
Second valve 6 of the inner bottom part of logical main body 1 is discharged, and the first valve 3 of connection air gauge 8 is opened after water level decreasing in main body 1, this
When can by air gauge 8 observe main body 1 in air pressure change, the internal upper part headspace gas of 9 supervision subjectses of graduation mark 1 can be passed through
Volume, close and the second valve 6 and gas cylinder for connecting aeration tube 4 after the volume needed for reach, until connect bottom in main body 1
After the not draining of second valve 6 in portion, the second valve 6 of the connection inner bottom part of main body 1 is closed.Now the internal upper part of main body 1 is indifferent gas
Body, bottom is water body example, by rocking in main body 1, the CO2 in main body 1 in water body is discharged into inert gas, Ran Houjing
Putting the water in main body 1 --- CO2 reaches balance between vapor interface.
3rd, it is evacuated
Pumping process is after water in main body 1 --- CO2 extracts and is stored in atmospheric sampling bag out after reaching balance between vapor interface
In.Air-inlet of vacuum pump silicone tube is connected with the upper end of drying tube 7, the gas outlet silicone tube of vavuum pump and atmospheric sampling
Bag connection, after starting vavuum pump, opens the first valve 3 of connection drying tube 7 and the second valve 6 of communicated air bags 5.Now air
Air bag 5 is entered from the second valve 6 of communicated air bags 5, air bag 5 expands, and the water surface of the internal upper part of main body 1 is gradually increasing, inert gas
And CO2 is extracted out from the first valve 3 of connection drying tube 7, during atmospheric sampling bag is stored in after drying tube 3.This process can
With the air pressure change observed in main body 1 by air gauge 8, graduation mark 9 can be passed through, the internal upper part headspace gas of supervision subjectses 1
Volume Changes.When the water surface is close to top soon in main body 1, closes the first valve 3 of connection drying tube 7 and connect air gauge 8
First valve 3, closes the second valve 6 of the connection inner bottom part of main body 1.Now the inert gas in main body 1 is extracted, due to having
Air bag 5 expands, even if therefore the water surface rises and also will not become inside it vacuum in main body 1, and air pressure change is little.
4th, draining
Drainage procedure is water body example to be discharged in main body 1 after experiment terminates.Opening is not connected to drying tube 7 and aeration tube 4
The first valve 3, connection the inner bottom part of main body 1 the second valve 6 and communicated air bags 5 the second valve 6, now water body will be from connection
Second valve 6 of the inner bottom part of main body 1 is discharged, and the gas in air bag 5 will be discharged from the second valve 6 of communicated air bags 5.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (6)
1. dissolved gas Static Headspace field sampling equipment in portable water, it is characterised in that including main body (1) and lid
(2), the main body (1) for upper end open hollow cylinder structure, the lid (2) is removably sealed in the main body (1)
Aperture position at；Internal the first valve (3) of the main body (1) is communicated with the lid (2)；In the main body
(1) inner bottom part is provided with aeration tube (4) and air bag (5), and the aeration tube (4) is provided with multiple pores；The side wall of the main body (1)
Be provided with three the second valves (6), three second valves (6) be respectively communicated with the aeration tube (4), the air bag (5) and
Bottom in the main body (1).
2. field sampling equipment according to claim 1, it is characterised in that first valve (3) is provided with three, and
It is respectively equipped with drying tube (7) and air gauge (8) in the outlet of two first valves (3) wherein.
3. field sampling equipment according to claim 1, it is characterised in that the side wall of the main body (1) is provided with reading
The graduation mark (9) of its internal gas volume.
4. field sampling equipment according to claim 1, it is characterised in that the lid (2) is by flange bolt (10)
Removably it is sealed at the aperture position of the main body (1), and sets between the lid (2) and the main body (1) top
There is sealing ring.
5. according to claim 1 as 4 arbitrary described field sampling equipment, it is characterised in that the aeration tube is relative to institute
The inclined bottom surface for stating main body is arranged.
6. field sampling equipment according to claim 5, it is characterised in that the aeration tube (4) and the main body (1)
Angle between bottom surface is 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710031281.0A CN106644619A (en) | 2017-01-17 | 2017-01-17 | Portable water-soluble gas static headspace outdoor sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710031281.0A CN106644619A (en) | 2017-01-17 | 2017-01-17 | Portable water-soluble gas static headspace outdoor sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106644619A true CN106644619A (en) | 2017-05-10 |
Family
ID=58840758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710031281.0A Pending CN106644619A (en) | 2017-01-17 | 2017-01-17 | Portable water-soluble gas static headspace outdoor sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644619A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175094A (en) * | 2020-02-17 | 2020-05-19 | 北京市环境保护科学研究院 | Low-permeability site soil air headspace acquisition device, acquisition method and application thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395229B1 (en) * | 2000-05-22 | 2002-05-28 | Michael Markelov | Headspace sampling apparatus and method |
| CN101405227A (en) * | 2006-12-29 | 2009-04-08 | 株式会社客满世 | Diffuser for aeration |
| JP2009121875A (en) * | 2007-11-13 | 2009-06-04 | Ekikuro Science Kk | Pressurized head space gas whole quantity introduction system |
| CN101639469A (en) * | 2009-08-25 | 2010-02-03 | 成都科林分析技术有限公司 | Gas displacement and dynamic compensation sampling method in headspace analysis |
| CN102435533A (en) * | 2011-09-08 | 2012-05-02 | 中国石油化工股份有限公司 | Liquid sampling analysis device and method |
| EP2485035A2 (en) * | 2011-02-03 | 2012-08-08 | Technical University of Crete | Vacuum assisted headspace microextraction sampling devices and methods |
| CN203011754U (en) * | 2012-12-18 | 2013-06-19 | 泰兴市梅兰化工有限公司 | Pretreatment device for detection of volatile organic compounds in water |
| CN103293030A (en) * | 2012-02-22 | 2013-09-11 | 中国地质科学院地球物理地球化学勘查研究所 | Sampler for measuring gaseous mercury released from soil |
| CN104111183A (en) * | 2014-07-02 | 2014-10-22 | 中国地质科学院岩溶地质研究所 | Portable amphibious equipment for collecting greenhouse gases |
| CN204988813U (en) * | 2015-09-23 | 2016-01-20 | 河南中分仪器股份有限公司 | Head space outgases and uses syringe |
| CN105301150A (en) * | 2015-12-09 | 2016-02-03 | 中国地质科学院水文地质环境地质研究所 | Field enrichment device for volatile organic compounds in underground water |
| CN105588737A (en) * | 2014-11-10 | 2016-05-18 | 中国石油化工股份有限公司 | Gas-collecting metering apparatus and metering method being suitable for soluble gas |
| CN206430957U (en) * | 2017-01-17 | 2017-08-22 | 中国地质科学院岩溶地质研究所 | Dissolved gas Static Headspace field sampling equipment in portable water |
-
2017
- 2017-01-17 CN CN201710031281.0A patent/CN106644619A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395229B1 (en) * | 2000-05-22 | 2002-05-28 | Michael Markelov | Headspace sampling apparatus and method |
| CN101405227A (en) * | 2006-12-29 | 2009-04-08 | 株式会社客满世 | Diffuser for aeration |
| JP2009121875A (en) * | 2007-11-13 | 2009-06-04 | Ekikuro Science Kk | Pressurized head space gas whole quantity introduction system |
| CN101639469A (en) * | 2009-08-25 | 2010-02-03 | 成都科林分析技术有限公司 | Gas displacement and dynamic compensation sampling method in headspace analysis |
| EP2485035A2 (en) * | 2011-02-03 | 2012-08-08 | Technical University of Crete | Vacuum assisted headspace microextraction sampling devices and methods |
| CN102435533A (en) * | 2011-09-08 | 2012-05-02 | 中国石油化工股份有限公司 | Liquid sampling analysis device and method |
| CN103293030A (en) * | 2012-02-22 | 2013-09-11 | 中国地质科学院地球物理地球化学勘查研究所 | Sampler for measuring gaseous mercury released from soil |
| CN203011754U (en) * | 2012-12-18 | 2013-06-19 | 泰兴市梅兰化工有限公司 | Pretreatment device for detection of volatile organic compounds in water |
| CN104111183A (en) * | 2014-07-02 | 2014-10-22 | 中国地质科学院岩溶地质研究所 | Portable amphibious equipment for collecting greenhouse gases |
| CN105588737A (en) * | 2014-11-10 | 2016-05-18 | 中国石油化工股份有限公司 | Gas-collecting metering apparatus and metering method being suitable for soluble gas |
| CN204988813U (en) * | 2015-09-23 | 2016-01-20 | 河南中分仪器股份有限公司 | Head space outgases and uses syringe |
| CN105301150A (en) * | 2015-12-09 | 2016-02-03 | 中国地质科学院水文地质环境地质研究所 | Field enrichment device for volatile organic compounds in underground water |
| CN206430957U (en) * | 2017-01-17 | 2017-08-22 | 中国地质科学院岩溶地质研究所 | Dissolved gas Static Headspace field sampling equipment in portable water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175094A (en) * | 2020-02-17 | 2020-05-19 | 北京市环境保护科学研究院 | Low-permeability site soil air headspace acquisition device, acquisition method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206430957U (en) | Dissolved gas Static Headspace field sampling equipment in portable water | |
| CN102353560B (en) | Gathering device for gas released by water body and sampling method thereof | |
| CN200993635Y (en) | Vacuum water penetrating block permeability coefficient detecting instrument | |
| CN206235495U (en) | A kind of Groundwater solution gas sampling system | |
| CN206074567U (en) | Liquid level volatilization gas detector closure construction | |
| CN106644619A (en) | Portable water-soluble gas static headspace outdoor sampling device | |
| CN208333963U (en) | A kind of fixed water-quality sampler | |
| CN106442066A (en) | Soil culture device with small air collector | |
| CN207866566U (en) | Transformer oil vacuum quantitative sampling instrument | |
| CN110220988A (en) | A kind of simulation soil column N2O dissolves the method and device of process nitrogen acquisition | |
| CN207336136U (en) | Micro pressure sampler for oil contamination degree detector | |
| CN203274835U (en) | Lead-acid storage battery gas collection device | |
| CN108760406A (en) | A kind of water/sediment interface greenhouse gases collection device | |
| CN106092457A (en) | A kind of detecting device for sealing property of ball valves | |
| CN217277191U (en) | Novel gaseous sample of groundwater solution gas device | |
| CN206248404U (en) | Underground water dissolved gas on-site sampler | |
| CN206192729U (en) | Take small -size gas collector's soil culture apparatus | |
| CN204807439U (en) | Be applicable to and water funkly be afraid of that oxygen compound carries out ultraviolet cell for fluorescence detection | |
| CN208254889U (en) | A kind of split type chemical method the escaping of ammonia sample absorption cell | |
| CN207081578U (en) | A kind of extractor for the detection of underground gas and liquid collecting | |
| CN203929420U (en) | A kind of bottle of collecting sample | |
| CN207751966U (en) | A kind of dynamic test system of corrosion inhibiter inhibition rate | |
| CN207472608U (en) | Multifunctional sample detection cup | |
| CN111366423A (en) | Device for collecting soil breathing gas and gas collecting method | |
| CN221286952U (en) | Extraction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
|
| RJ01 | Rejection of invention patent application after publication |