CN201561960U - Device for detecting agricultural chemical volatility - Google Patents
Device for detecting agricultural chemical volatility Download PDFInfo
- Publication number
- CN201561960U CN201561960U CN2009202830406U CN200920283040U CN201561960U CN 201561960 U CN201561960 U CN 201561960U CN 2009202830406 U CN2009202830406 U CN 2009202830406U CN 200920283040 U CN200920283040 U CN 200920283040U CN 201561960 U CN201561960 U CN 201561960U
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- agricultural chemicals
- air
- volatile device
- glass tube
- detection
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Abstract
The utility model discloses a device for detecting agricultural chemical volatility, which comprises a box body with a temperature-control mechanism and a vacuum mechanism, wherein one to twenty units are arranged in the box body; an air filtering mechanism (4), an air flow adjusting mechanism, a volatilizable chamber and an agricultural chemical absorbing mechanism which are connected in turn are arranged in every unit; the air filtering mechanism (4) is communicated with external air of the box body; and the agricultural chemical absorbing mechanism is communicated with the vacuum mechanism. The device method of the utility model is convenient and is easy to operate, and the operation is strong. The device is a sealing static negative-pressure absorbing device, which has the advantages of that the equipment structure is simple; connection pipes are simple; the manufacture and the maintenance are convenient; and multi-group samples can be detected at the same time.
Description
Technical field
The utility model relates to the volatile device of a kind of detection agricultural chemicals, is suitable for to measure the volatility of agricultural chemicals in surrounding mediums such as soil, water, air.
Background technology
The volatility of agricultural chemicals is meant that agricultural chemicals escapes into phenomenon the atmosphere from plant surface, the water surface and soil surface by volatilization.The volatilization of agricultural chemicals can occur in the production of agricultural chemicals, among each stage after storing and transporting, use and using, it not only can cause the loss of agricultural chemicals, also can cause the pollution of surrounding environment.Simultaneously, the volatile size of agricultural chemicals can have influence on the situation of holding staying property and in environment reallocating of agricultural chemicals in soil.
Be the volatility of evaluating chemical agricultural chemicals in different medium, registration and use for agricultural chemicals simultaneously provides the environmentology data, test unit should satisfy and is applicable under uniform temperature and the gas flow rate condition volatility of agricultural chemicals in different mediums such as air, water body and soil.After joining agricultural chemicals in the different medium, absorb the agricultural chemicals that evaporates,, calculate the volatility of agricultural chemicals by measuring pesticide concentration in absorption liquid and the medium with absorption liquid.For the requirement of device, meet the relevant agricultural chemicals environmental safety evaluation test criterion requirement of country, the test recovery reaches between 70～110%.Under above-mentioned background, invented the agricultural chemicals volatility determinator of utility model just.
Summary of the invention
Technical problem to be solved in the utility model provides and a kind ofly can detect the volatile device of agricultural chemicals in the multiple medium simultaneously, with the volatility of better evaluation agricultural chemicals.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
The volatile device of a kind of detection agricultural chemicals, it comprises the casing that has temperature-controlling mechanism and vacuum mechanism; Box house has 1～20 unit; Each inside, unit is equipped with air filtration mechanism, both air flow modulation mechanism, volatilization chamber and the agricultural chemicals absorbing mechanism that links to each other successively; Air filtration mechanism is connected with the casing outside air, and agricultural chemicals absorbing mechanism is connected with vacuum mechanism.
Wherein, described element number is preferred 3～10.
Wherein, described air filtration mechanism is composed in series by 1～10 sealed glass tube, and preferred 2～4 sealed glass tubes are composed in series, and is filled with the potpourri of any one or two kinds among acticarbon and the CaO in every glass tube.Above-mentioned sealed glass tube preferably is composed in series by rubber hose.
Wherein, described volatilization chamber is the resealable container that has air intake opening and gas outlet.Have and elect the ground plane ware that has top cover as, the plane ware has an air intake opening, is provided with a gas outlet with the top of air intake opening relative position.Air intake opening is connected with both air flow modulation mechanism, and the gas outlet is connected with agricultural chemicals absorbing mechanism.Indoor soil or the water of being equipped with of described volatilization, after will joining soil, water or directly be added to the double dish surface for the examination agricultural chemicals, with plane ware and top cover fluid sealant good seal, again air intake opening is connected with both air flow modulation mechanism, the gas outlet is connected with agricultural chemicals absorbing mechanism, can investigate the volatility of agricultural chemicals in surrounding mediums such as soil, water, air.
Wherein, between volatilization chamber and agricultural chemicals absorbing mechanism, also can be provided with air valve.
Wherein, described agricultural chemicals absorbing mechanism is composed in series by 1～10 sealed glass tube, and preferred 2～4 sealed glass tubes are composed in series, and in the every glass tube organic solvent are housed.Above-mentioned sealed glass tube preferably is composed in series by rubber hose, and a glass draft tube and glass escape pipe are arranged in the every glass tube, and the glass draft tube is longer, places below the organic solvent liquid level, and the glass escape pipe is shorter, places more than the organic solvent liquid level.The general requirement of described organic solvent is bigger to this agricultural chemicals solubleness, can be ethyl acetate, toluene, water, N, N dimethyl formamide or methyl alcohol.
Wherein, described temperature-controlling mechanism partly is made up of compressor refrigeration and electrical heating, and to keep the stability of test temperature, temperature is in 20～25 ℃ of scopes in the may command casing.
Wherein, described both air flow modulation mechanism can select spinner-type flowmeter for use, when keeping test gas flow rate stable (± 10ml/min), to satisfy the requirement of agricultural chemicals volatile test, the control gas velocity is in 150～1000mL/min scope.
Beneficial effect:
1, the utility model installation method is simple and easy to do, and is workable.This device is the static negative pressure absorption plant of enclosure-type, and device structure is simple, connecting line is simple, manufacturing and easy to maintenance.
2, this device can be measured many group samples simultaneously.
3, this device adopts multistage absorption tube to absorb the volatilization agricultural chemicals, guarantees to absorb fully, can meet the demands.
Description of drawings
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the connection diagram of air feed and absorption system in the agricultural chemicals volatilization process of the test.
Wherein, 1, casing; 2, temperature-controlling mechanism; 3, vacuum mechanism; 4, air filtration mechanism; 5, volatilization chamber; 6, agricultural chemicals absorbing mechanism; 7: both air flow modulation mechanism; 8 air valves.
Embodiment
According to following embodiment, can understand the utility model better.Yet, those skilled in the art will readily understand that embodiment only is used to illustrate the utility model, and should also can not limit described in detail the utility model in claims.
Embodiment 1:
By shown in Figure 1, the volatile device of detection agricultural chemicals of the present utility model comprises the casing 1 that has temperature-controlling mechanism 2 and vacuum mechanism 3; Casing 1 inside has 1～20 unit; What Fig. 1 showed is a preferred embodiment, comprises 3 identical unit; Each inside, unit is equipped with air filtration mechanism 4, both air flow modulation mechanism 7, volatilization chamber 5 and the agricultural chemicals absorbing mechanism 6 that links to each other successively; Air filtration mechanism 4 is connected with casing 1 outside air, and agricultural chemicals absorbing mechanism 6 is connected with vacuum mechanism 3.
Agricultural chemicals absorbing mechanism 6 is composed in series by 1～10 sealed glass tube, in the every glass tube organic solvent is housed, and what Fig. 2 showed is a preferred embodiment, comprises 3 sealed glass tubes.A glass draft tube and glass escape pipe are arranged in the every glass tube, and the glass draft tube is longer, places below the organic solvent liquid level, and the glass escape pipe is shorter, places more than the organic solvent liquid level.Described organic solvent is ethyl acetate, toluene, water, N, N dimethyl formamide or methyl alcohol.
During use, earlier media such as soil, water are placed volatilization chamber 5 respectively.Add agricultural chemicals in double dish, with the plane ware and the top cover fluid sealant good seal of volatilization chamber 5.The pipeline that connects air filtration mechanism 4, both air flow modulation mechanism 7, volatilization chamber 5, air valve 8 and agricultural chemicals absorbing mechanism 6 successively.Each organizes between the sample arranged side by side mutually, is not communicated with between each group, reaches non-interfering state.Start vacuum mechanism 3, after the air process air filtration mechanism 4, the 5 li agricultural chemicals that evaporate in volatilization chamber are taken away, absorb by the absorption liquid in the agricultural chemicals absorbing mechanism 6 at last, temperature-controlling mechanism 2 control temperature of reaction are in 20～25 ℃ of scopes, and both air flow modulation mechanism 7 pilot-gas flow velocitys are in the scope of 150～1000mL/min.Air filtration mechanism 4 is in order to moisture that contains in the filtered air and the pesticide molecule that may contain.The effect of both air flow modulation mechanism 7 is to regulate air-flow, makes that the gas flow between each group keeps stable, reach same level (± 10ml/min).The agricultural chemicals that evaporates from volatilization chamber 5 enters agricultural chemicals absorbing mechanism 6 with air, and after absorbing through agricultural chemicals absorbing mechanism 6, absorption liquid is agricultural chemicals fixedly, and gas is through the vacuum pump discharger.Wait to volatilize after the off-test, the absorbent solution in all glass tubes in sample in the volatilization chamber 5 and the agricultural chemicals absorbing mechanism 6 is collected, assay determination pesticide concentration wherein calculates the volatility of agricultural chemicals and the recovery of test.
Embodiment 2:
A) preparation of standard solution:
Accurately take by weighing standard sample of pesticide in the 100mL volumetric flask, be diluted to scale with suitable solvent, it is standby to obtain the pesticide standard storing solution.
The pesticide standard working solution is made by above-mentioned standard solution dilution.
B) volatilization test:
1. the volatilization of agricultural chemicals in glass surface (air):
Accurately draw a certain amount of pesticide standard solution in the glass culture dish of 9cm diameter, double dish is put into the volatilization chamber, sealing volatilization chamber.Start empty vacuum pump at ambient temperature, with the gas flow rate of 500mL/min by the volatilization chamber.Absorb through multistage absorption tube by the gas behind the volatilization chamber, contain a certain amount of absorption liquid in every absorption tube, test duration 24h measures pesticide concentration in absorption liquid and the double dish respectively after the off-test.
2. the volatilization of agricultural chemicals in water:
Prepare certain density agricultural chemicals aqueous solution, in the glass culture dish of 9cm diameter, double dish is put into the volatilization chamber.The same operation after 24 hours, is measured pesticide concentration in absorption liquid and the double dish respectively.
3. agricultural chemicals is in the volatilization of soil surface
Claim 20g soil to be tiled in the glass culture dish of 10cm diameter, add a certain amount of pesticide standard solution, treat that solvent evaporates to the greatest extent after, evenly drip the about 10mL of pure water.Pesticide concentration in absorption liquid and the soil is measured in the same operation respectively after 24 hours.
C) sample extraction method:
1. soil sample is extracted: by suitable soil extract method, after pedotheque extraction, purification, concentrating, quantitatively filter, treat Instrument measuring.
2. water sample extracts: will pour in the separating funnel through the agricultural chemicals aqueous solution of volatilization test, the extraction agent extraction with suitable concentrates, behind the constant volume, filtration, treats Instrument measuring.
3. absorption liquid is handled: merge the absorption liquid in the secondary absorption tube, concentrate, constant volume is treated Instrument measuring.
D) evaluation of pesticides
The mensuration of agricultural chemicals can select for use gas chromatography, liquid chromatography etc. to be fit to the Instrument measuring of this agricultural chemicals.
E) interpretation of result
Table 1～table 3 has provided the volatilization experimental result of fungicide difenoconazole, organophosphorus pesticide terbufos, herbicide bromacil.Table 4 has provided the vapour pressure of 3 kinds of agricultural chemicals.In general, vapour pressure is more little, and agricultural chemicals is not easy volatilization more, and the vapour pressure of Difenoconazole and bromacil is far smaller than terbufos.By test, the volatility of Difenoconazole and bromacil is also than little many of terbufos.Simultaneously, the recovery illustrates that also this device can satisfy every requirement of measuring the agricultural chemicals volatile performance.
Because the utility model agricultural chemicals volatile performance proving installation, simple in structure, easy to operate simple and practical, can reach the higher test recovery, satisfy every requirement that the agricultural chemicals volatile performance is measured, be a kind of device of efficient, easy mensuration agricultural chemicals volatile performance.
The volatilization test findings of table 1 Difenoconazole in different medium
The volatilization test findings of table 2 terbufos in different medium
The volatilization test findings of table 3 bromacil in different medium
The vapour pressure of three kinds of agricultural chemicals of table 4
Claims (10)
1. one kind is detected the volatile device of agricultural chemicals, it is characterized in that it comprises the casing (1) that has temperature-controlling mechanism (2) and vacuum mechanism (3); Casing (1) inside has 1～20 unit; Each inside, unit is equipped with air filtration mechanism (4), both air flow modulation mechanism (7), volatilization chamber (5) and the agricultural chemicals absorbing mechanism (6) that links to each other successively; Air filtration mechanism (4) is connected with casing (1) outside air, and agricultural chemicals absorbing mechanism (6) is connected with vacuum mechanism (3).
2. the volatile device of detection agricultural chemicals according to claim 1 is characterized in that described air filtration mechanism (4) is composed in series by 1～10 sealed glass tube, is filled with the potpourri of any one or two kinds among acticarbon and the CaO in every glass tube.
3. the volatile device of detection agricultural chemicals according to claim 2 is characterized in that 1～10 sealed glass tube is composed in series by rubber hose.
4. the volatile device of detection agricultural chemicals according to claim 1 is characterized in that described volatilization chamber (5) is for having the resealable container of air intake opening and gas outlet.
5. the volatile device of detection agricultural chemicals according to claim 4 is characterized in that described volatilization chamber (5) for having the ground plane ware of top cover, and the plane ware has an air intake opening, is provided with a gas outlet with the top of air intake opening relative position.
6. according to claim 4 or the volatile device of 5 described detection agricultural chemicals, it is characterized in that air intake opening is connected with both air flow modulation mechanism (7), the gas outlet is connected with agricultural chemicals absorbing mechanism (6).
7. the volatile device of detection agricultural chemicals according to claim 1 is characterized in that being provided with air valve (8) between volatilization chamber (5) and agricultural chemicals absorbing mechanism (6).
8. the volatile device of detection agricultural chemicals according to claim 1 is characterized in that described agricultural chemicals absorbing mechanism (6) is composed in series by 1～10 sealed glass tube, is equipped with organic solvent in the every glass tube.
9. the volatile device of detection agricultural chemicals according to claim 8, it is characterized in that a glass draft tube and glass escape pipe are arranged in the every glass tube, the glass draft tube is longer, places below the organic solvent liquid level, the glass escape pipe is shorter, places more than the organic solvent liquid level.
10. according to Claim 8 or the volatile device of 9 described detection agricultural chemicals, it is characterized in that described organic solvent is ethyl acetate, toluene, water, N, N dimethyl formamide or methyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202830406U CN201561960U (en) | 2009-12-15 | 2009-12-15 | Device for detecting agricultural chemical volatility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202830406U CN201561960U (en) | 2009-12-15 | 2009-12-15 | Device for detecting agricultural chemical volatility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201561960U true CN201561960U (en) | 2010-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202830406U Expired - Lifetime CN201561960U (en) | 2009-12-15 | 2009-12-15 | Device for detecting agricultural chemical volatility |
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| Country | Link |
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| CN (1) | CN201561960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675125A (en) * | 2013-11-27 | 2014-03-26 | 江苏省环境监测协会 | Test device for sampling efficiency of volatile organic compounds in air |
| CN114019056A (en) * | 2021-11-09 | 2022-02-08 | 江苏省农业科学院 | Pesticide volatility measuring device and using method |
-
2009
- 2009-12-15 CN CN2009202830406U patent/CN201561960U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675125A (en) * | 2013-11-27 | 2014-03-26 | 江苏省环境监测协会 | Test device for sampling efficiency of volatile organic compounds in air |
| CN103675125B (en) * | 2013-11-27 | 2015-04-15 | 江苏省环境监测中心 | Test device for sampling efficiency of volatile organic compounds in air |
| CN114019056A (en) * | 2021-11-09 | 2022-02-08 | 江苏省农业科学院 | Pesticide volatility measuring device and using method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100825 |