CN220323210U - Pretreatment device for measuring concentration of greenhouse gases in water body - Google Patents
Pretreatment device for measuring concentration of greenhouse gases in water body Download PDFInfo
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- CN220323210U CN220323210U CN202320136526.7U CN202320136526U CN220323210U CN 220323210 U CN220323210 U CN 220323210U CN 202320136526 U CN202320136526 U CN 202320136526U CN 220323210 U CN220323210 U CN 220323210U
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- Prior art keywords
- way valve
- concentration
- syringe
- greenhouse gases
- water
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- 239000005431 greenhouse gas Substances 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 abstract description 18
- 239000008239 natural water Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000012071 phase Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000003988 headspace gas chromatography Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a pretreatment device for measuring the concentration of greenhouse gases in a water body, which is characterized by comprising an injector A (1), a three-way valve (2), an injector B (3), an injection needle head (4), a sample injection bottle (5) and a measuring cup (6), wherein the injector A (1) is connected with an upper interface of the three-way valve (2), a side interface of the three-way valve (2) is connected with the injector B (3), and a lower interface of the three-way valve (2) is connected with injectionThe needle head (4) is connected, the injection needle head (4) is inserted into a sample injection bottle (5) which is vacuumized in advance, and the sample injection bottle (5) is arranged in a measuring cup (6) in a liquid seal mode. The utility model solves the interference of the atmosphere on the collection of the greenhouse gases, and not only can the concentration of the collected gases be tested, but also the CO can be monitored 2 And CH (CH) 4 To better reveal the effect of natural water greenhouse gas emissions on global mass circulation.
Description
Technical Field
The utility model belongs to scientific research experimental devices, and particularly relates to a pretreatment device for measuring the concentration of greenhouse gases in a water body.
Background
The monitoring and evaluation of the global natural water body greenhouse gas emission under the 'carbon reaching peak' and the 'carbon neutralization' of China are of great importance. The main method for measuring the concentration of greenhouse gases in natural water bodies (rivers, underground water, reservoirs, lakes and the like) is a Headspace Gas Chromatography (HGC), wherein a water sample is placed in a sealed headspace bottle, the water sample is balanced for a certain time at a certain temperature, and the greenhouse gases in the water escape to an upper space and reach dynamic balance in gas-liquid two phases. At this time, the concentration of the greenhouse gas in the gas phase is proportional to its concentration in the liquid phase. The concentration of the greenhouse gas in the water sample can be calculated by measuring the concentration of the greenhouse gas in the gas phase using a gas chromatograph with an Electron Capture Detector (ECD).
However, the related acquisition means and devices are still lacking in acquiring natural water bodies at present, especially for the greenhouse gas concentration of the layered water bodies of karst lakes and reservoirs. Related instruments for directly monitoring the greenhouse gas emission of the water body in the prior art cannot be directly obtained due to the water depth. Based on this, we design a device for rapidly collecting greenhouse gas concentration in karst water, and application has been carried out in laboratory now, and the effect is good.
Defects in the prior art:
(1) The water sample is required to be sent to a laboratory for analysis as soon as possible after being collected on site or needs to be monitored in the field for a long time, so that a large amount of manpower and material resources are required to be consumed, and a large error can be generated due to overlong storage time;
(2) The water sample cannot be thoroughly separated from the escaped greenhouse gas, and the carrying is inconvenient;
(3) An automatic headspace sampler is required, and a gas chromatograph cannot be directly used.
Disclosure of Invention
The utility model aims to provide a greenhouse for measuring water bodyThe pretreatment device for the gas concentration solves the interference of the atmosphere on the collection of greenhouse gases, and not only can the concentration of the collected gas be tested, but also the CO can be monitored 2 And CH (CH) 4 To better reveal the effect of natural water greenhouse gas emissions on global mass circulation.
The technical scheme of the utility model is as follows:
the pretreatment device for measuring the concentration of greenhouse gases in water comprises an injector A, a three-way valve, an injector B, an injection needle, a sample injection bottle and a measuring cup, wherein the injector A is connected with an upper interface of the three-way valve, a side interface of the three-way valve is connected with the injector B, a lower interface of the three-way valve is connected with the injection needle, the injection needle is inserted into the sample injection bottle which is vacuumized in advance, and the sample injection bottle is arranged in the measuring cup in a liquid seal mode.
Further, the syringe A is 100ml in size.
Further, the syringe B is 10ml in size.
Further, the sample injection bottle has a specification of 3ml.
The principle of the utility model is as follows: based on Dalton gas partial pressure law and Henry law, a gas-liquid tight system consisting of a water sample and gas which does not influence the measurement result is formed at room temperature, and after oscillation, standing is carried out, so that the dissolved greenhouse gas in the water sample reaches distribution balance between gas-liquid two phases, then the concentration of the greenhouse gas in the headspace gas is measured by utilizing a gas chromatography, and the concentration of the dissolved greenhouse gas in the water sample is calculated according to the volume of the gas-liquid two phases.
The utility model is characterized in that:
(1) Greenhouse gases escaping from the water sample are collected in situ rapidly in the open air and are thoroughly separated from the water sample, so that experimental errors are reduced, sampling burden is lightened, precious time is saved, and working efficiency is improved;
(2) The device solves the interference of the atmosphere on the collection of the greenhouse gases, and the collected gases not only can test the concentration of the gases, but also can monitor the CO 2 And CH (CH) 4 To better reveal the effect of natural water greenhouse gas emissions on global mass circulation.
(3) And after the sample is rapidly collected, the gas chromatograph is directly used for analysis, so that the method is simple, convenient and rapid, and the sample measuring cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The marks in the figure: 1. the device comprises a syringe A, a syringe 2, a three-way valve, a syringe 3, a syringe B, a syringe 4, an injection needle, a sample injection bottle 5, a measuring cup 6.
Detailed Description
The utility model is further illustrated by the following figures and examples.
Referring to fig. 1, the utility model relates to a pretreatment device for measuring the concentration of greenhouse gases in water, which comprises a 100ml syringe A1, a three-way valve 2, a 10ml syringe B3, an injection needle 4, a 3ml sample injection bottle 5 and a measuring cup 6, wherein the 100ml syringe A1 is connected with an upper interface of the three-way valve 2, a side interface of the three-way valve 2 is connected with the 10ml syringe B3, a lower interface of the three-way valve 2 is connected with the injection needle 4, the injection needle 4 is inserted into the 3ml sample injection bottle 5 which is vacuumized in advance, and the 3ml sample injection bottle 5 is arranged in the measuring cup 6 for liquid sealing.
The application steps of the utility model are as follows:
firstly, sucking 50ml of water sample by using a 100ml syringe 1; sucking 10ml of gas (such as helium) which does not affect the measurement result, closing a valve and vibrating for at least 5min; the device is then installed as shown.
1. Rotating the three-way valve 2 to connect the upper interface with the side interface, pushing the top air of the 100ml syringe 1 into the 10ml syringe 3;
2. the three-way valve 2 is rotated to connect the side port with the lower port end, and the gas in the 10ml syringe 3 is injected into the 3ml sample injection bottle 5 which is vacuumized in advance under the liquid sealing condition.
3. The concentration of methane and other greenhouse gases in the sample bottles was detected using a gas chromatograph.
During operation, greenhouse gases in the water sample are rapidly extracted on site, so that the samples are conveniently preserved and subsequently processed, and the concentration of the greenhouse gases in the water sample can be rapidly determined through detection and calculation of a gas chromatograph.
The technical effects are as follows:
1. the greenhouse gas escaping from the water sample is collected on site through the water sample greenhouse gas replacement device and thoroughly separated from the water sample, so that the sampling burden is reduced, and the experimental error is reduced;
2. due to the adoption of inert gas replacement, the pollution of the atmosphere background is effectively avoided, and the CO can be accurately detected 2 And CH (CH) 4 Is a stable carbon isotope value of (2);
3. after the field sample is collected, the gas chromatograph can be directly used in a laboratory for analysis, so that the greenhouse gas concentration in the water sample can be determined simply, conveniently and quickly, the sample measuring cost is reduced, the working efficiency is improved, and the application range is wide.
The above embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (4)
1. A pretreatment device for measuring the concentration of greenhouse gases in a water body is characterized in that: including syringe A (1), three-way valve (2), syringe B (3), syringe needle (4), advance appearance bottle (5) and graduated flask (6), interface connection on syringe A (1) and three-way valve (2), three-way valve (2) side interface is connected with syringe B (3), and interface and syringe needle (4) are connected under three-way valve (2), and syringe needle (4) inserts in advance evacuation advance advances appearance bottle (5), advances appearance bottle (5) and arranges in the graduated flask (6) liquid seal.
2. A pretreatment device for determining the concentration of greenhouse gases in a body of water as recited in claim 1, wherein: the specification of the syringe A (1) is 100ml.
3. A pretreatment device for determining the concentration of greenhouse gases in a body of water as recited in claim 1, wherein: the specification of the syringe B (3) is 10ml.
4. A pretreatment device for determining the concentration of greenhouse gases in a body of water as recited in claim 1, wherein: the sample injection bottle (5) is 3ml in specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320136526.7U CN220323210U (en) | 2023-02-07 | 2023-02-07 | Pretreatment device for measuring concentration of greenhouse gases in water body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320136526.7U CN220323210U (en) | 2023-02-07 | 2023-02-07 | Pretreatment device for measuring concentration of greenhouse gases in water body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220323210U true CN220323210U (en) | 2024-01-09 |
Family
ID=89415753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320136526.7U Active CN220323210U (en) | 2023-02-07 | 2023-02-07 | Pretreatment device for measuring concentration of greenhouse gases in water body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220323210U (en) |
-
2023
- 2023-02-07 CN CN202320136526.7U patent/CN220323210U/en active Active
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