CN220983238U - Plant leaf gas interface mercury flux measurement and isotope analysis device - Google Patents
Plant leaf gas interface mercury flux measurement and isotope analysis device Download PDFInfo
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- CN220983238U CN220983238U CN202322528369.7U CN202322528369U CN220983238U CN 220983238 U CN220983238 U CN 220983238U CN 202322528369 U CN202322528369 U CN 202322528369U CN 220983238 U CN220983238 U CN 220983238U
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- way valve
- mercury
- flux
- gas interface
- plant leaf
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 114
- 230000004907 flux Effects 0.000 title claims abstract description 86
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 238000004458 analytical method Methods 0.000 title claims description 15
- 238000001035 drying Methods 0.000 claims description 11
- 239000004809 Teflon Substances 0.000 claims description 6
- 229920006362 Teflon® Polymers 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 description 27
- 239000007789 gas Substances 0.000 description 27
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000100 multiple collector inductively coupled plasma mass spectrometry Methods 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of gas collection, in particular to a plant leaf gas interface mercury flux measuring and isotope analyzing device. The apparatus includes a plurality of flux bags, each flux bag having an air inlet and an air outlet. The air inlets are connected in series through the first three-way valve, the first end of the third three-way valve is connected, and the second end of the third three-way valve is connected with the fourth three-way valve. The air outlet is connected with the mercury-rich pipe through a second three-way valve, and is connected with a sixth three-way valve in series through a fifth three-way valve. The third three-way valve is connected with the atmospheric sample inlet and the zero gas sample inlet. The fourth three-way valve is connected with the gaseous mercury analyzer, and the sixth three-way valve is connected with the air extracting pump. By covering the leaves in the flux bags, continuous measurement and sample collection of the atmospheric mercury concentration in a plurality of flux bags can be realized, so that on-line measurement of mercury flux at the leaf-gas interface and high-resolution collection of mercury isotope samples can be realized.
Description
Technical Field
The utility model relates to the technical field of gas collection, in particular to a plant leaf gas interface mercury flux measuring and isotope analyzing device.
Background
Mercury is a toxic and harmful pollutant and widely exists in the atmosphere, and when the plant leaves absorb atmospheric carbon dioxide through photosynthesis, the atmospheric mercury is absorbed into the leaves together and enters the plant body through the nutrition transmission process of the plant. Meanwhile, mercury in the plant body can also discharge mercury to the atmosphere through the processes of releasing oxygen through photosynthesis of the blades, releasing vapor through respiration and the like. Thus, there is a time-free exchange of mercury between the plant leaf and the atmosphere (leaf-air interface). The mercury exchange flux of the leaf gas interface is measured with high precision, and the mercury isotope composition characteristics are analyzed, so that the absorption and emission rules of the plant to the atmospheric mercury can be well studied, and the influence of the plant to the atmospheric mercury and the transformation process can be deeply known. However, the absorption and emission of atmospheric mercury by plant leaves is very low, making it very difficult to measure the mercury exchange flux at the leaf-gas interface in real time and with high accuracy. In addition, the minimum detection limit of the current mercury isotope measuring instrument (multi-receiving plasma mass spectrometer, MC-ICP-MS) is only 5 nanograms (ng), and the minimum detection limit of MC-ICP-MS is also a technical problem which is very challenging at present for collecting enough mercury discharged by blades.
Because the atmospheric mercury absorbed by a single blade and the mercury released into the atmosphere are very little and far do not reach the lowest detection limit of the current gaseous mercury analyzer, the current measurement of the mercury exchange flux of the leaf-gas interface is mainly evaluated by measuring the mercury flux of a single plant and branch.
However, the prior art is only used for measuring the mercury flux of plants and branches, and the mercury adsorbed and released by the diameter or the branches of the plants and the periphyton of the branches can cause interference to the mercury flux of a leaf gas interface, so that the measured flux value is not an actual leaf gas interface mercury flux value. Because the mercury flux between the plant and the atmosphere is very low, the prior art method cannot completely and continuously measure the concentration and collect the sample of the atmospheric mercury in the flux bag or the flux cylinder, and the measurement and sample collection can be continued after waiting for the balance of the gas in the flux bag or the flux cylinder at intervals.
In addition, the mass of the atmospheric mercury released by the blades collected by the prior art method cannot reach the minimum detection limit of a mercury isotope measuring instrument, so that analysis and measurement of mercury isotope composition cannot be satisfied.
Disclosure of Invention
First, the technical problem to be solved
The utility model mainly aims at the problems and provides a plant leaf gas interface mercury flux measurement and isotope analysis device, which aims at solving the problem of how to continuously measure the concentration or collect samples of atmospheric mercury in a plurality of flux bags at the same time.
(II) technical scheme
In order to achieve the above object, the present utility model provides a plant leaf gas interface mercury flux measuring and isotope analyzing device, comprising a plurality of flux bags, the flux bags having an air inlet and an air outlet, wherein:
the air inlet of each flux bag is connected with a corresponding first three-way valve, each first three-way valve is connected in series through a pipe fitting, a third three-way valve is connected at a first end of the series connection, and a fourth three-way valve is connected at a second end of the series connection;
The air outlet of each flux bag is connected with a corresponding second three-way valve, the first air outlet of each second three-way valve is connected with a mercury enrichment pipe, the second air outlet of each second three-way valve and the mercury enrichment pipe are connected with a fifth three-way valve, the fifth three-way valves are connected in series through pipe fittings, and a sixth three-way valve is arranged at one end of the series connection;
The first air inlet of the third three-way valve is connected with an atmospheric sample inlet, and the second air inlet of the third three-way valve is connected with a zero gas sample inlet;
The fourth three-way valve is connected with the sixth three-way valve, the fourth three-way valve is connected with the gaseous mercury analyzer, and the sixth three-way valve is connected with the air extracting pump.
Further, a drying pipe is arranged between the fourth three-way valve and the gaseous mercury analyzer.
Further, a mass flow controller is further arranged between the sixth three-way valve and the air extracting pump.
Further, the number of the flux bags is not less than three.
Further, the drying pipe is a soda lime drying pipe.
Further, the pipe fittings are all teflon pipe fittings.
Further, the inner wall of the flux bag is made of Teflon materials.
Further, the sampling flow rate set by the mass flow controller is 1-10L/min.
(III) beneficial effects
Compared with the prior art, the plant leaf gas interface mercury flux measuring and isotope analyzing device provided by the utility model has the advantages that the plurality of flux bags are respectively covered into the single leaf, and continuous concentration measurement or sample collection is carried out on the atmospheric mercury in the flux bags, so that the on-line measurement of the leaf gas interface mercury flux and the high-resolution collection of mercury isotope samples are realized.
The device optimizes the current technical limit, and by introducing the gaseous mercury analyzer and the air pump, the mercury flux value of the leaf gas interface can be continuously obtained on the premise of ensuring the accuracy and no pollution of the sample, and the measurement error caused by environmental factors and time intervals is reduced. Meanwhile, through the use of the mercury enrichment tube, atmospheric mercury samples released by plant leaves can be efficiently collected, and analysis requirements on mercury isotope composition are met.
Drawings
Fig. 1 is a schematic diagram of a plant leaf gas interface mercury flux measurement and isotope analysis device according to the present application.
Reference numerals shown in the drawings: 1. a flux bag; 2. a first three-way valve; 3. a second three-way valve; 4. a third three-way valve; 5. a fourth three-way valve; 6. a mercury-rich tube; 7. a fifth three-way valve; 8. a sixth three-way valve; 9. a drying tube; 10. a gaseous mercury analyzer; 11. a mass flow controller; 12. and an air pump.
Detailed Description
The following detailed description of the present utility model, taken in conjunction with the accompanying drawings, will clearly and fully describe the technical solutions of the embodiments of the present utility model, it being evident that the described embodiments are only some, but not all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic structure diagram of a plant leaf gas interface mercury flux measurement and isotope analysis device according to a preferred embodiment of the present application is shown. In the embodiment shown in fig. 1, the device comprises a plurality of flux bags 1, the flux bags 1 having an air inlet and an air outlet, wherein:
The air inlet of each flux bag 1 is connected with a corresponding first three-way valve 2, each first three-way valve 2 is connected in series through a pipe fitting, a third three-way valve 4 (used for controlling the sampling of the atmosphere or zero gas) is connected at a first end of the series connection, and a fourth three-way valve 4 is connected at a second end of the series connection;
The air outlet of each flux bag 1 is connected with a corresponding second three-way valve 3, the first air outlet of each second three-way valve 3 is connected with a mercury enriching pipe 6 (used for collecting atmospheric mercury released by the blades), the second air outlet of each second three-way valve 3 and the mercury enriching pipe 6 are connected with a fifth three-way valve 7, each fifth three-way valve 7 is connected in series through a pipe fitting, and a sixth three-way valve 8 (connected with an air extracting pump 12 and used for extracting the atmosphere in the flux bag 1) is arranged at one end of the series;
The first air inlet of the third three-way valve 4 is connected with an atmospheric sample inlet, and the second air inlet of the third three-way valve 4 is connected with a zero gas sample inlet;
the fourth three-way valve 5 is connected with the sixth three-way valve 8, the fourth three-way valve 5 is connected with the gaseous mercury analyzer 10, and the sixth three-way valve 8 is connected with the air pump 12.
The device for continuously monitoring the mercury flux and isotope analysis of the leaf gas interface is based on the basic principle that the flux bags 1 are used for collecting the atmospheric mercury released by plant leaves, so that the continuous on-line monitoring of the mercury flux and the isotopes of the leaf gas interface is realized, the concentration measurement and the sample collection of the atmospheric mercury in a plurality of flux bags 1 can be simultaneously carried out, and the efficiency and the accuracy are improved.
In some embodiments, a drying tube 9 is further arranged between the fourth three-way valve 5 and the gaseous mercury analyzer 10.
In some embodiments, a mass flow controller 11 is further disposed between the sixth three-way valve 8 and the suction pump 12.
As shown in fig. 1, a plurality of (at least 3) teflon flux bags 1 are made according to the size of plant leaves, and are respectively numbered as a, b and c until the flux bags n, the flux bags 1 are respectively covered into single leaves, the bag openings are fastened on the leaf handles, and air leakage is prevented from entering the flux bags 1.
When the mercury flux of the leaf gas interface is measured, the third three-way valve 4 is conducted to one side of the atmospheric sample inlet, the zero gas sample inlet is closed, one end of the first three-way valve 2, which is led to the flux bag 1, is closed, one end of the sixth three-way valve 8, which is led to the fourth three-way valve 5, is closed, one end of the fourth three-way valve 5, which is led to the gaseous mercury analyzer 10, is opened, and at this time, the gaseous mercury analyzer 10 can measure the concentration of the atmospheric mercury outside the flux bag 1, namely, the atmospheric mercury enters the third three-way valve 4 from the atmospheric sample inlet, reaches the fourth three-way valve 5 through each first three-way valve 2, and enters the gaseous mercury analyzer 10 after passing through the drying pipe 9.
After the measurement of the atmospheric mercury concentration outside the flux bag 1 for a certain time is completed, one end of each first three-way valve 2, which guides the flux bag 1, is opened, one end of each first three-way valve 2, which guides the flux bag N, is closed, one end of each second three-way valve 3, which guides the mercury enrichment pipe 6, is closed, one end of each second three-way valve 3, which is connected with the fifth three-way valve 7, is opened, one end of each fifth three-way valve 7, which guides the mercury enrichment pipe 6, one end of each second three-way valve 3 is opened, one end of each sixth three-way valve 8, which guides the mass flow controller 11, is closed, one end of each fourth three-way valve 5 is opened, at this time, the gaseous mercury analyzer 10 can measure the atmospheric mercury concentration inside the flux bag 1, the measurement time is the same as the measurement time of the atmospheric mercury concentration outside the flux bag 1, and after the measurement of the atmospheric mercury concentration inside the flux bag 1 is completed, the atmospheric mercury concentration outside the flux bag 1 is automatically switched to be measured, and thus circulated. And then the flux of the atmospheric mercury at the leaf gas interface can be calculated according to the concentration of the atmospheric mercury inside and outside the flux bag 1, the sample injection flow rate and the volume, so that the online measurement of the flux of the atmospheric mercury at the leaf gas interface is realized.
When the atmospheric mercury discharged by the plant leaves is collected for isotope analysis, the third three-way valve 4 is conducted to one side of a zero gas (mercury-free atmosphere) injection port, the atmospheric injection port is closed, one end of each first three-way valve 2, which leads to the flux bag 1, is opened, one end of each first three-way valve 2, which leads to the air inlet of the flux bag n, is closed, one end of each second three-way valve 3, which leads to the air outlet of each flux bag 1 and one end of the air inlet of the mercury enrichment tube 6, is opened, one end of each fifth three-way valve 7, which leads to the mercury enrichment tube 6, is closed, one end of each second three-way valve 2, one end of each sixth three-way valve 8, which leads to the mass flow controller 11, is opened, one end of each fourth three-way valve 5, is closed, and the air pump 12 is started, and then the atmospheric mercury discharged from the inside each flux bag 1 can be enriched on the mercury enrichment tube 6 through the corresponding mercury enrichment tube 6, the mass flow controller 11 can control the flow rate, and after the mercury mass collected by the mercury enrichment tube 6 reaches the detection limit of the isotope analyzer, the air pump 12 is closed, and the mercury is taken down to the isotope analyzer for isotope analysis.
The quantity of the flux bags 1 can be determined according to experimental requirements and the atmospheric mercury concentration level released by the plant leaves, and at least more than 3 leaves can collect the atmospheric mercury in the flux bags 1 in order to ensure that enough mercury released by the plant leaves can be collected. The pipe fittings of the whole measuring and collecting system are Teflon pipe fittings, so that the adsorption of the pipeline to gaseous mercury is prevented. The mercury exchange flux of the leaf gas interface can be measured on line in real time for a long time through the gaseous mercury analyzer 10, and meanwhile, the mass of the mercury released by the plant leaves collected by the mercury enriching tube 6 can be estimated to reach the minimum detection limit of the mercury isotope analyzer by combining the flow control of the mass flow controller 11, so that the mercury enriching tube is convenient to replace in time, and the efficient collection and measurement analysis of the atmospheric mercury released by the plant leaves are realized.
In some embodiments, the drying tube 9 is a soda lime drying tube.
In some embodiments, the mass flow controller 11 sets a sampling flow rate of 1 to 10L/min.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Several of the units or means recited in the apparatus claims may also be embodied by one and the same unit or means, either in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present application.
Claims (8)
1. A plant leaf gas interface mercury flux measurement and isotope analysis device, comprising a plurality of flux bags, the flux bags having an air inlet and an air outlet, wherein:
the air inlet of each flux bag is connected with a corresponding first three-way valve, each first three-way valve is connected in series through a pipe fitting, a third three-way valve is connected at a first end of the series connection, and a fourth three-way valve is connected at a second end of the series connection;
The air outlet of each flux bag is connected with a corresponding second three-way valve, the first air outlet of each second three-way valve is connected with a mercury enrichment pipe, the second air outlet of each second three-way valve and the mercury enrichment pipe are connected with a fifth three-way valve, the fifth three-way valves are connected in series through pipe fittings, and a sixth three-way valve is arranged at one end of the series connection;
The first air inlet of the third three-way valve is connected with an atmospheric sample inlet, and the second air inlet of the third three-way valve is connected with a zero gas sample inlet;
The fourth three-way valve is connected with the sixth three-way valve, the fourth three-way valve is connected with the gaseous mercury analyzer, and the sixth three-way valve is connected with the air extracting pump.
2. The plant leaf gas interface mercury flux measurement and isotope analysis device according to claim 1, wherein a drying tube is further arranged between the fourth three-way valve and the gaseous mercury analyzer.
3. The plant leaf gas interface mercury flux measurement and isotope analysis device according to claim 1, wherein a mass flow controller is further arranged between the sixth three-way valve and the air pump.
4. The plant leaf gas interface mercury flux measurement and isotope analysis device of claim 1 wherein the number of flux bags is not less than three.
5. The plant leaf gas interface mercury flux measuring and isotope analyzing device according to claim 2, wherein the drying tube is a soda lime drying tube.
6. The plant leaf gas interface mercury flux measuring and isotope analyzing device of claim 1 wherein the tubing is teflon tubing.
7. The plant leaf gas interface mercury flux measuring and isotope analyzing device according to claim 1, wherein the inner wall of the flux bag is made of teflon.
8. The plant leaf gas interface mercury flux measuring and isotope analyzing device according to claim 3, wherein the sampling flow rate set by the mass flow controller is 1-10L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322528369.7U CN220983238U (en) | 2023-09-18 | 2023-09-18 | Plant leaf gas interface mercury flux measurement and isotope analysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322528369.7U CN220983238U (en) | 2023-09-18 | 2023-09-18 | Plant leaf gas interface mercury flux measurement and isotope analysis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220983238U true CN220983238U (en) | 2024-05-17 |
Family
ID=91041359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322528369.7U Active CN220983238U (en) | 2023-09-18 | 2023-09-18 | Plant leaf gas interface mercury flux measurement and isotope analysis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220983238U (en) |
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2023
- 2023-09-18 CN CN202322528369.7U patent/CN220983238U/en active Active
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