CN114019056A - Pesticide volatility measuring device and using method - Google Patents
Pesticide volatility measuring device and using method Download PDFInfo
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- CN114019056A CN114019056A CN202111321297.8A CN202111321297A CN114019056A CN 114019056 A CN114019056 A CN 114019056A CN 202111321297 A CN202111321297 A CN 202111321297A CN 114019056 A CN114019056 A CN 114019056A
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- 239000000575 pesticide Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims description 9
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 238000012864 cross contamination Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 239000003905 agrochemical Substances 0.000 description 4
- 210000005239 tubule Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (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 discloses a pesticide volatility measuring device which comprises an air inlet structure, an air exhaust structure, a sampling structure and a volatilization chamber, wherein the air inlet structure is arranged on the air inlet structure; the volatilization chamber comprises a cabin body and a cover plate at the top of the cabin body; the air inlet structure comprises a PVC air inlet pipe, and an air flow meter is arranged at an air outlet of the flexible rubber pipe; the air exhaust structure comprises a PVC end cover, and a pressure release valve is arranged on a PVC exhaust pipe; the sampling structure comprises an air sampler; according to the scheme, the cabin body of the volatilization chamber has good light transmission and is convenient to observe, and the sealing performance is good, so that the pesticide gas in the volatilization chamber is prevented from escaping, and the reliability of pesticide volatility data measurement is ensured; the gas of the PVC air inlet pipe is provided by a remote plant incubator, so that the sustainability of the gas with the volatilized pesticide is ensured, and the cross contamination with the outside air is prevented; a pressure release valve is arranged in the PVC exhaust pipe, so that the phenomenon that the air pressure in the volatilization chamber is too high to dissipate is effectively prevented; the placeable air sampler has the adsorbability to the pesticide volatilized in the air, thereby providing accurate and repeatable pesticide volatility test results.
Description
Technical Field
The invention relates to the technical field of pesticide property detection, in particular to a pesticide volatility measuring device, and particularly relates to a using method of the pesticide volatility measuring device.
Background
The active ingredients, formulation type, ambient temperature and humidity of the pesticide all affect its volatility. Volatilization of the pesticide from the soil and leaf surfaces can cause movement of the pesticide gases in the air, thereby reducing the effectiveness of the pesticide on vegetation. Meanwhile, the volatilized pesticide is transferred to nearby residential areas, lakes and rivers along with environmental side wind, and serious harm is caused to the health and ecological environment of surrounding residents.
Previous studies have used different systems to try to understand and quantify the volatility of pesticides, but different systems have limitations in determining relative comparisons of pesticide volatility, such as not quantifying pesticide concentration or not considering leaf surface volatility, and thus have difficulty providing accurate, repeatable pesticide volatility results.
Therefore, it is necessary to design a device for measuring pesticide volatility and a using method thereof.
Disclosure of Invention
In view of the problems mentioned in the background, it is an object of the present invention to provide a device and a tool for measuring volatility of agricultural chemicals, which solve the problems mentioned in the background.
The technical purpose of the invention is realized by the following technical scheme:
a pesticide volatility measuring device comprises an air inlet structure, an air exhaust structure, a sampling structure and a volatilization chamber;
the volatilization chamber comprises a cabin body and a cover plate at the top of the cabin body;
the air inlet structure comprises a PVC air inlet pipe, an air outlet of the PVC air inlet pipe is positioned in the cabin body, an air inlet of the PVC air inlet pipe penetrates through the cover plate to be communicated with an air outlet of the flexible rubber pipe, and an air flow meter is installed at the air outlet of the flexible rubber pipe;
the air exhaust structure comprises a PVC end cover, a top elbow of the PVC end cover is communicated with an air inlet of an air hose, the bottom of the PVC end cover is communicated with a PVC exhaust pipe in a matching manner, the PVC exhaust pipe is arranged on the cover plate in an inserting manner through a positioning seat, and a pressure release valve is arranged on the PVC exhaust pipe;
the sampling structure includes the air sampler, the air sampler is located the inside middle part of the cabin body, the top intercommunication of air sampler has the tubule.
By adopting the technical scheme, the air containing the volatile pesticide provided by the plant incubator is discharged into the volatilization chamber through the flexible rubber tube, the output air pressure is adjusted through a pressure gauge in the plant cultivation, and the gas flow entering the volatilization chamber is adjusted through the air flow meter; after the pesticide is applied for 24 hours, 48 hours, 72 hours and 96 hours, the air sampler is taken down and replaced, and the air sampler and the filling material thereof are eluted to extract the volatile pesticide adsorbed by the air sampler; carry out the quantitative determination to using high performance liquid chromatograph to adsorbed pesticide after carrying out centrifugal filtration to extracting the pesticide, conveniently carry out the quantitative determination to the pesticide, the gas of PVC air-supply line is provided by long-range plant incubator, guarantees to have the sustainability of volatilizing the pesticide gas and prevents with the cross contamination of outside air, the last relief valve that is equipped with of PVC exhaust pipe for the control volatilizees indoor pesticide gas atmospheric pressure, prevent that atmospheric pressure is too big and the loss, image data's reliability.
In one embodiment, the cover plate is provided with a through hole for installing an air inlet pipe, an air exhaust pipe and an air sampler.
By adopting the technical scheme, the air inlet pipe, the exhaust pipe and the air sampler can be conveniently installed.
In one embodiment, the PVC air inlet duct extends vertically a distance down and then extends a distance to the left at a 90 ° angle; 9 air holes are drilled on the PVC air inlet pipe at uniform intervals; the top of the PVC air inlet pipe is connected with the airflow meter and the flexible rubber pipe through an end cover elbow.
Through adopting above-mentioned technical scheme, the air current meter is used for adjusting the gas flow who volatilizees the room, and flexible rubber tube links to each other with the plant incubator after the application of pesticides, can transport the inside of volatilizing the room through flexible rubber tube with the pesticide that volatilizees.
In one embodiment, the bottom of the PVC exhaust pipe is provided with an opening and vertically extends to the bottom of the volatilization chamber, and the PVC exhaust pipe is drilled with 4 rows of 16 small holes which are uniformly arranged.
Through adopting above-mentioned technical scheme, the PVC exhaust pipe bores 4 rows of 16 align to grid's aperture, is favorable to the air to be evenly got rid of, is equipped with the relief valve above the PVC exhaust pipe to avoid volatilizing the room excessive pressure.
In one embodiment, the top of the air sampler is plugged with a rubber plug with a hole in the middle, the rubber plug is clamped in the middle of the cover plate, and the thin tube penetrates out of the hole in the middle of the rubber plug.
Through adopting above-mentioned technical scheme, the rubber buffer plays sealed effect and is convenient for the dismantlement of air sampler.
In one embodiment, the air sampler is a mesh tube, and the inside of the mesh tube is filled with an adsorbing material such as cotton or porous filter paper.
Through adopting above-mentioned technical scheme, improve the ability of air absorption of air sampler.
In one embodiment, the cover plate and the cabin body are tightly sealed by pipeline adhesive tapes.
By adopting the technical scheme, the sealing performance between the cover plate and the cabin body is improved.
The invention also provides a using method of the pesticide volatility measuring device, the pesticide volatility measuring device is adopted for testing, and the method comprises the following steps:
the first step is as follows: the plant incubator provides air containing volatile pesticide, the air is discharged into the volatilization chamber through the flexible rubber tube, the output air pressure is adjusted through a pressure gauge in the plant cultivation, and the flow of the air entering the volatilization chamber is adjusted through the air flow meter;
the second step is that: after the pesticide is applied for 24 hours, 48 hours, 72 hours and 96 hours, the air sampler is taken down and replaced, and the air sampler and the filling material thereof are eluted to extract the volatile pesticide adsorbed by the air sampler;
the third step: the extracted pesticide is subjected to centrifugal filtration, and then the adsorbed pesticide is quantitatively determined by using a high performance liquid chromatograph.
In summary, the invention mainly has the following beneficial effects:
1. the cabin body light transmissivity of the volatilization chamber is good, the observation is convenient, the sealing performance is good, the pesticide gas in the volatilization chamber is prevented from escaping, and the reliability of pesticide volatility data measurement is ensured.
2. The gas of PVC air-supply line is provided by long-range plant incubator, guarantees to have the sustainability of volatilizing pesticide gas and prevents with the cross contamination of outside air.
3. The PVC exhaust pipe is internally provided with a pressure release valve, thereby effectively preventing the overlarge air pressure in the volatilization chamber from dissipating.
4. The placeable air sampler has the adsorbability to the pesticide volatilized in the air, thereby providing accurate and repeatable pesticide volatility test results.
Drawings
FIG. 1 is a schematic view of a device for measuring the volatility of a pesticide;
FIG. 2 is a front view showing the structure of a device for measuring volatility of agricultural chemicals;
FIG. 3 is a schematic view showing the structure of an air exhaust structure of a device for measuring the volatility of agricultural chemicals;
FIG. 4 is a front view of an air exhaust structure of a device for measuring volatility of agricultural chemicals;
fig. 5 is a schematic structural diagram of a PVC air inlet pipe of a pesticide volatility measuring apparatus.
Reference numerals:
1. a thin tube; 2. an air flow meter; 3. a flexible rubber tube; 4. a rubber plug; 5. an air sampler; 6. a PVC air inlet pipe; 7. an air hose; 8. a PVC end cap; 9. a pressure relief valve; 10. positioning seats; 11. a cover plate; 12. a PVC exhaust pipe; 13. a cabin body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a device for measuring pesticide volatility comprises an air inlet structure, an air exhaust structure, a sampling structure and a volatilization chamber;
the volatile chamber is composed of a cabin body 13 and a cover plate 11 at the top of the cabin body 13, and the cover plate 11 and the cabin body 13 are tightly sealed through a pipeline adhesive tape;
the air inlet structure comprises a PVC air inlet pipe 6, an air outlet of the PVC air inlet pipe 6 is positioned inside a cabin body 13, an air inlet of the PVC air inlet pipe 6 penetrates through a cover plate 11 to be communicated with an air outlet of a flexible rubber pipe 3, an air flow meter 2 is installed at the air outlet of the flexible rubber pipe 3, and the PVC air inlet pipe 6 vertically faces downwards for a certain distance and then extends leftwards for a certain distance at an angle of 90 degrees; 9 air holes are drilled on the PVC air inlet pipe 6 at uniform intervals; the top of the PVC air inlet pipe 6 is connected with the air flow meter 2 and the flexible rubber pipe 3 through an end cover elbow and is used for adjusting the gas flow of the volatilization chamber, the flexible rubber pipe 3 is connected with the plant incubator after pesticide application, and volatilized pesticides can be transported to the inside of the volatilization chamber through the flexible rubber pipe 3;
the air exhaust structure comprises a PVC end cover 8, a top elbow of the PVC end cover 8 is communicated with an air inlet of an air hose 7, the bottom of the PVC end cover 8 is communicated with a PVC exhaust pipe 12 in a matching way, the PVC exhaust pipe 12 is installed on a cover plate 11 in an inserting way through a positioning seat 10, a pressure relief valve 9 is installed on the PVC exhaust pipe 12, the bottom of the PVC exhaust pipe 12 is provided with an opening, the PVC exhaust pipe 12 vertically extends to the bottom of the volatilization chamber, 4 rows of 16 uniformly-arranged small holes are drilled on the PVC exhaust pipe 12, the top of the PVC exhaust pipe 12 penetrates through the cover plate 11, and the pressure relief valve 9 is installed above the PVC exhaust pipe to avoid the overpressure of the volatilization chamber;
sampling structure includes air sampler 5, and air sampler 5 is located the inside middle part of the cabin body 13, and air sampler 5's top intercommunication has tubule 1, and the porose rubber buffer 4 in middle part that some top of air sampler 5 are packed, and rubber buffer 4 card is at the middle part of apron 11, and tubule 1 wears out from the centre hole of rubber buffer 4. The rubber buffer 4 plays the sealed effect and is convenient for the dismantlement of air sampler 5, when dismantling rubber buffer 4 and air sampler 5 wholly take out can. The air sampler 5 is a net pipe, and cotton, porous filter paper and the like can be filled in the air sampler 5 and used for adsorbing pesticides in the air.
In order to facilitate the installation of the air inlet pipe, the air outlet pipe and the air sampler 5, the cover plate 11 is provided with through holes for installing the air inlet pipe, the air outlet pipe and the air sampler 5.
The invention also provides a using method of the pesticide volatility measuring device, the pesticide volatility measuring device is adopted for testing, and the method comprises the following steps:
the first step is as follows: the plant incubator provides air containing volatile pesticide, the air is discharged into the volatilization chamber through the flexible rubber tube 3, the output air pressure is adjusted through a pressure gauge in the plant incubator, and the flow of the air entering the volatilization chamber is adjusted through the air flow meter 2;
the second step is that: after the pesticide is applied for 24 hours, 48 hours, 72 hours and 96 hours, the air sampler 5 is taken down and replaced, the air sampler 5 and the filling material thereof are eluted, and the volatile pesticide adsorbed by the air sampler 5 is extracted;
the third step: the extracted pesticide is subjected to centrifugal filtration, and then the adsorbed pesticide is quantitatively determined by using a high performance liquid chromatograph.
To sum up:
1. the good observation of being convenient for of room cabin body 13 light transmissivity volatilizees, and the leakproofness prevents to volatilize indoor pesticide gas loss well, ensures the reliability of pesticide volatility data survey.
2. The gas of the PVC air inlet pipe 6 is provided by a remote plant incubator, so that the sustainability of the volatile pesticide gas is ensured, and the cross contamination with the outside air is prevented.
3. The PVC exhaust pipe is internally provided with a pressure release valve 9, thereby effectively preventing the overlarge air pressure in the volatilization chamber from dissipating.
4. The placeable air sampler 5 has the adsorbability to the pesticide volatilized in the air, thereby providing accurate and repeatable pesticide volatility test results.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A pesticide volatility survey device which characterized in that: comprises an air inlet structure, an air exhaust structure, a sampling structure and a volatilization chamber;
the volatilization chamber comprises a cabin body (13) and a cover plate (11) at the top of the cabin body (13);
the air inlet structure comprises a PVC air inlet pipe (6), an air outlet of the PVC air inlet pipe (6) is positioned inside the cabin body (13), an air inlet of the PVC air inlet pipe (6) penetrates through the cover plate (11) to be communicated with an air outlet of the flexible rubber pipe (3), and an air flow meter (2) is installed at the air outlet of the flexible rubber pipe (3);
the air exhaust structure comprises a PVC end cover (8), a top elbow of the PVC end cover (8) is communicated with an air inlet of an air hose (7), the bottom of the PVC end cover (8) is communicated with a PVC exhaust pipe (12) in a matching mode, the PVC exhaust pipe (12) is installed on the cover plate (11) in an inserting mode through a positioning seat (10), and a pressure release valve (9) is installed on the PVC exhaust pipe (12) through the pressure release valve;
the sampling structure comprises an air sampler (5), wherein the air sampler (5) is positioned in the middle of the interior of the cabin body (13), and the top of the air sampler (5) is communicated with a thin tube (1).
2. The device for measuring volatility of a pesticide according to claim 1, wherein: the cover plate (11) is provided with a through hole for installing an air inlet pipe, an air exhaust pipe and an air sampler (5).
3. The device for measuring volatility of a pesticide according to claim 1, wherein: the PVC air inlet pipe (6) vertically extends downwards for a certain distance and then extends leftwards for a certain distance at an angle of 90 degrees; 9 air holes are drilled on the PVC air inlet pipe (6) at uniform intervals; the top of the PVC air inlet pipe (6) is connected with the airflow meter (2) and the flexible rubber pipe (3) through an end cover elbow.
4. The device for measuring volatility of a pesticide according to claim 1, wherein: PVC exhaust pipe (12) bottom is the opening setting, extends to the bottom of volatilizing the room perpendicularly, PVC exhaust pipe (12) bore 4 rows of 16 align to grid's aperture.
5. The device for measuring volatility of a pesticide according to claim 1, wherein: the air sampler is characterized in that a rubber plug (4) with a hole in the middle is plugged at the top of the air sampler (5), the rubber plug (4) is clamped in the middle of the cover plate (11), and the thin tube (1) penetrates out from a middle hole of the rubber plug (4).
6. The device for measuring volatility of a pesticide according to claim 5, wherein: the air sampler (5) is a net pipe, and cotton or porous filter paper and other adsorbing materials are filled inside the net pipe.
7. The device for measuring volatility of a pesticide according to claim 1, wherein: the cover plate (11) and the cabin body (13) are tightly sealed through a pipeline adhesive tape.
8. The use method of the pesticide volatility measuring device is characterized by comprising the following steps: the pesticide volatility measuring device of any one of claims 1-7 is used for testing, and comprises the following steps:
the first step is as follows: the plant incubator provides air containing volatile pesticide, the air is discharged into the volatilization chamber through the flexible rubber tube (3), the output air pressure is adjusted through a pressure gauge in the plant incubator, and the flow of the air entering the volatilization chamber is adjusted through the air flow meter (2);
the second step is that: after the pesticide is applied for 24 hours, 48 hours, 72 hours and 96 hours, the air sampler (5) is taken down and replaced, and the air sampler (5) and the filling material thereof are eluted to extract the volatile pesticide adsorbed by the air sampler;
the third step: the extracted pesticide is subjected to centrifugal filtration, and then the adsorbed pesticide is quantitatively determined by using a high performance liquid chromatograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321297.8A CN114019056A (en) | 2021-11-09 | 2021-11-09 | Pesticide volatility measuring device and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321297.8A CN114019056A (en) | 2021-11-09 | 2021-11-09 | Pesticide volatility measuring device and using method |
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| CN114019056A true CN114019056A (en) | 2022-02-08 |
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| CN202111321297.8A Pending CN114019056A (en) | 2021-11-09 | 2021-11-09 | Pesticide volatility measuring device and using method |
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