CN111707493A - Water-retention type pesticide residue detection method suitable for spongy wet soil - Google Patents
Water-retention type pesticide residue detection method suitable for spongy wet soil Download PDFInfo
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- CN111707493A CN111707493A CN202010562950.9A CN202010562950A CN111707493A CN 111707493 A CN111707493 A CN 111707493A CN 202010562950 A CN202010562950 A CN 202010562950A CN 111707493 A CN111707493 A CN 111707493A
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- 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
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a water-retaining pesticide residue detection method suitable for spongy wet soil, which belongs to the technical field of soil pesticide residue detection, and comprises a double-cavity closed sampler, wherein the double-cavity closed sampler comprises an inner cavity and an outer cavity, and the detection method comprises the following steps: the invention adopts the double-cavity closed sampler to sample the soil to obtain the soil sample which is not extruded and compacted and the soil sample which is dehydrated after being extruded, and the two parts of soil samples and the average sample after the two parts of soil samples are mixed are classified and detected, so that the residual pesticide content before and after the soil is extruded can be analyzed, the influence of the extrusion on the soil detection result is detected, and the accurate detection result is obtained.
Description
Technical Field
The invention relates to the technical field of soil pesticide residue detection, in particular to a water-retention type pesticide residue detection method suitable for spongy wet soil.
Background
The pesticide residue is a general term of trace pesticide protomer, toxic metabolite, degradation product and impurity in harvested products, soil, water body and atmosphere, which are not decomposed and remain in organisms in a period after the pesticide is used. The pesticide applied to the crops is partially attached to the crops, partially scattered in the environment such as soil, atmosphere and water, and part of the pesticide remained in the environment can be absorbed by the plants. The residual pesticide can directly reach human bodies and livestock bodies through plant fruits or water and air, or can be finally transferred to human bodies and livestock through the environment and a food chain, so that the human health is harmed.
Soil is an important environment for living and living of organisms and human beings, and the soil is polluted by pesticides, so that the growth of crops is influenced, and the harm to the health of people is finally caused. Therefore, high importance is attached to detection of pesticide residues in soil.
When the soil pesticide residue is detected, a sampler is needed to sample soil, the sampler is vertically inserted into the soil during sampling, the soil enters the sampler and is then taken out by friction force, but the sampler can extrude the soil during the process of inserting the sampler, the soil can be compacted inside the sampler, the friction force between the soil and the sampler is ensured, so that the moisture in the soil is greatly lost due to extrusion, and particularly under the condition of high soil humidity, the pesticide amount in the soil can be greatly reduced due to the loss of the moisture, and the detection result is seriously influenced; secondly, bringing out the soil by friction force easily causes the falling of the soil, and is not particularly suitable for loose soil.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to provide a water-retention pesticide residue detection method suitable for spongy and wet soil, which adopts a double-cavity closed sampler to sample soil to obtain a soil sample which is not extruded and compacted and a soil sample which loses water after being extruded, and can analyze the content of residual pesticide before and after the soil is extruded and detect the influence of the extrusion on a soil detection result by classifying and detecting the two soil samples and an average sample obtained by mixing the two soil samples, so that a more accurate detection result can be obtained.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The water-retaining pesticide residue detection method suitable for spongy moist soil comprises a double-cavity closed sampler, wherein the double-cavity closed sampler comprises an inner cavity and an outer cavity, and the detection method comprises the following steps:
s1, selecting a complete area in a target detection area, and taking out a soil sample from the area by a detector by using a double-cavity closed sampler to obtain soil samples of an outer cavity and an inner cavity;
s2, uniformly dividing the soil sample in the outer cavity of the double-cavity closed sampler into n samples A, selecting a proper amount of soil from the soil in the inner cavity of the double-cavity closed sampler, uniformly dividing the soil into n samples B, and enabling the weight of the sample A to be the same as that of the sample B;
s3, selecting m samples A and m samples B (m is less than n), uniformly mixing the samples A and B, and dividing the mixture into 2m samples C;
s4, selecting three parts of the sample A, the sample B and the sample C, respectively using the three parts of the same sample as a test sample, a re-test sample and a reserved sample, respectively detecting the two parts of the sample A, the two parts of the sample B and the two parts of the sample C which are used as the test sample and the re-test sample, and obtaining a final detection result through data analysis.
According to the invention, the soil is sampled by adopting the double-cavity closed sampler, so that the soil sample which is not extruded and compacted and the soil sample which is dehydrated after being extruded are obtained, the two parts of soil samples and the average sample obtained after mixing the two parts of soil samples are classified and detected, so that the residual pesticide content before and after the soil is extruded can be analyzed, the influence of the extrusion on the soil detection result is detected, and the accurate detection result is obtained.
Further, the closed sampler of two-chamber includes the pedal, the upside of pedal is equipped with the montant, the through-hole has been seted up on the pedal, the montant rotates to be connected in the inside of through-hole, the downside of pedal is equipped with rotary cutter and L type fixed pole, rotary cutter is located the right angle inboard of L type fixed pole, the upper end of L type fixed pole and the lower extreme fixed connection of montant.
Further, the rotary cutter is the four-frame shape, the rotary cutter includes that the L type is hollow cuts the pole, the hollow pole of cutting of L type is kept away from the one end fixedly connected with main connecting rod of the fixed pole of L type, the upper end of main connecting rod and the lower extreme fixed connection of montant, the hollow vice connecting rod of fixedly connected with between cutting the pole of main connecting rod and L type, the upper surface of vice connecting rod contacts with the lower surface of trample.
Further, a permeable gauze and a waterproof plastic envelope are fixedly connected between the L-shaped hollow cutting rod and the L-shaped fixed rod, the waterproof plastic envelope is positioned on the inner side of the permeable gauze, a main L-shaped hole and an auxiliary L-shaped hole are respectively formed in the side end of the L-shaped hollow cutting rod, one side ends of the permeable gauze and the waterproof plastic envelope are respectively and fixedly connected to a pair of inner walls of the auxiliary L-shaped holes, an inner groove is formed in one end of the L-shaped fixed rod close to the L-shaped hollow cutting rod, the other side ends of the permeable gauze and the waterproof plastic envelope are respectively and fixedly connected to the inner walls of the inner groove, the upper end and the lower end of the permeable gauze and the waterproof plastic envelope are respectively and fixedly connected, an outer cavity is formed between the permeable gauze and the waterproof plastic envelope, the rotary cutter can be driven to rotate by the vertical rod, and the L-shaped hollow cutting rod and the L-shaped fixed rod are far away, when the L-shaped hollow cutting rod rotates for 360 degrees, the permeable gauze forms a cylinder shape, the inside of the permeable gauze is used as an inner cavity for storing soil, the soil is not easy to fall off when being taken out, meanwhile, the soil is not required to be compacted when being stored, the soil moisture is not easy to be influenced, an outer cavity formed between the permeable gauze and the waterproof plastic envelope is used for storing the soil cut by the L-shaped hollow cutting rod on a rotating path, the soil on the cutting path is extruded by the L-shaped hollow cutting rod, partial moisture of the soil is extruded out, the soil and the soil on the inner side of the waterproof plastic envelope are classified and stored, the soil of the inner cavity and the outer cavity are isolated by the waterproof plastic envelope, water molecules in the two parts of soil can not move mutually through the waterproof plastic envelope, the permeable gauze can facilitate the movement of the water molecules, and the extruded moisture can return to the soil of, further ensuring the authenticity of the detection result.
Further, one side that the gauze that permeates water was kept away from to the hollow pole of cutting of L type is equipped with a pair of section, and is a pair of the section is fixed connection respectively on a pair of inner wall in main L type hole, can cut soil more conveniently through a pair of section, makes things convenient for soil to get into the inside of the gauze that permeates water and waterproof plastic diolame simultaneously.
Further, the outer end fixedly connected with locating plate of montant, the lower surface of locating plate contacts with the upper surface of step board, a pair of locating hole has been seted up on the locating plate, a pair of locked groove has been seted up to the upper end of step board, threaded connection has the bolt between locating hole and the locked groove, fixes locating plate and step board through the bolt to realize montant and rotatory cutterbar fixed before the rotation, after, and, carry on spacingly through locating plate and vice connecting rod to montant and rotatory cutterbar in vertical direction, make it carry out stable rotation.
Furthermore, positioning lines are respectively carved on the upper surface of the pedal and the upper surface of the positioning plate, and the positioning plate can be conveniently and quickly and accurately positioned in rotation through the positioning lines.
Further, the lower extreme fixedly connected with of pedal adds the solid dish, it is located the outside of rotatory cutterbar and L type fixed rod to add the solid dish, the lower extreme that adds the solid dish is the cockscomb structure, and it has the control sampling depth and carries out the effect of fixing a position to the pedal to add the solid dish, when inserting L type fixed rod and rotatory cutterbar in soil, when adding the solid dish lower extreme and insert the soil top layer, can stop the inserting of L type fixed rod, simultaneously, when rotating the montant, can stabilize the position of pedal through adding the solid dish, further makes things convenient for the rotation of montant.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme adopts the closed sampler of two-chamber to take a sample to soil, obtains not receiving extrusion, the soil sample of compaction and receives the dehydrated soil sample after the extrusion, carries out classification detection through the average sample after mixing two parts soil sample and the two, can the analysis obtain soil receive the extrusion before, after the residual pesticide content, detect out the extrusion to soil testing result's influence to obtain comparatively accurate testing result.
(2) This scheme can drive the rotary cutter through the montant and rotate, when rotating, the hollow pole of cutting of L type and the pole is decided to L type are kept away from each other, make the gauze and the waterproof plastic diolame that permeate water expand gradually, when the hollow pole of cutting of L type rotates 360, the gauze that permeates water forms a columniform, its inside inner chamber as storing soil, it is difficult for dropping when taking out to make soil, simultaneously need not to carry out the compaction to soil when storing soil, make soil moisture be difficult for receiving the influence, the exocoel that forms between gauze and the waterproof plastic diolame of permeating water is used for storing the soil of the hollow pole of cutting of L type on the rotation route.
(3) Soil on the cutting route is because of receiving the extrusion of the hollow pole of cutting of L type, its partial moisture is extruded, consequently carries out classified storage with the inboard soil of waterproof plastic envelope, the soil of inner chamber and exocoel is kept apart through waterproof plastic envelope, and the hydrone in the soil of two parts can't pass through waterproof plastic envelope and remove each other, and the removal of hydrone can be convenient for to the gauze of permeating water, make the moisture that is extruded can get back to exocoel soil through waterproof gauze of permeating water, further guarantee the authenticity of testing result.
(4) One side that the gauze that permeates water was kept away from to the hollow pole of cutting of L type is equipped with a pair of section, and a pair of section difference fixed connection can more conveniently cut soil through a pair of section on a pair of inner wall in main L type hole, makes things convenient for soil to get into the inside of the gauze and the waterproof plastic diolame of permeating water simultaneously.
(5) The outer end fixedly connected with locating plate of montant, the lower surface of locating plate contacts with the upper surface of step board, a pair of locating hole has been seted up on the locating plate, a pair of locked groove has been seted up to the upper end of step board, threaded connection has the bolt between locating hole and the locked groove, fix locating plate and step board through the bolt, thereby realize montant and rotatory cutterbar before rotating, the back is fixed, and, carry on spacingly through locating plate and vice connecting rod to montant and rotatory cutterbar in vertical direction, make it carry out stable rotation.
(6) Positioning lines are carved on the upper surface of the pedal and the upper surface of the positioning plate, and the positioning plate can be quickly and accurately positioned by the aid of the positioning lines.
(7) The lower extreme fixedly connected with of trample board consolidates the dish, consolidate the outside that the dish is located rotatory cutterbar and L type fixed rod, the lower extreme of consolidating the dish is the cockscomb structure, consolidate the dish and have the control sampling depth and carry out the effect of fixing a position to the trample board, when fixing L type fixed rod and rotatory cutterbar and inserting soil, when consolidating the dish lower extreme and inserting the soil top layer, can stop the inserting of L type fixed rod, and simultaneously, when rotating the montant, can stabilize the position of trample board through consolidating the dish, further make things convenient for the rotation of montant.
Drawings
FIG. 1 is a block flow diagram of the present invention;
FIG. 2 is a first perspective view of the present invention;
FIG. 3 is a second perspective view of the present invention;
FIG. 4 is a schematic front view of the present invention;
FIG. 5 is a schematic top view of the rotary cutter of the present invention during rotation;
FIG. 6 is a schematic top view of the rotary cutter of the present invention prior to rotation;
fig. 7 is a schematic top view of the pedal of the present invention.
The reference numbers in the figures illustrate:
the device comprises a pedal 1, a locking groove 101, a vertical rod 2, a main connecting rod 31, an auxiliary connecting rod 32, a 33L-shaped hollow cutting rod, a main L-shaped hole 3301, an auxiliary L-shaped hole 3302, a 34 cutting piece, a 4L-shaped fixed rod, an internal groove 401, a 51 water-permeable gauze, a 52 water-proof plastic coating film, a 6 positioning plate, a 601 positioning hole, a 7 bolt, an 8 reinforcing disc and a 9 positioning line.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1, a method for detecting water retention type pesticide residue in spongy and wet soil includes a double-cavity closed sampler, the double-cavity closed sampler includes an inner cavity and an outer cavity, and the detection method includes the following steps:
s1, selecting a complete area in a target detection area, and taking out a soil sample from the area by a detector by using a double-cavity closed sampler to obtain soil samples of an outer cavity and an inner cavity;
s2, uniformly dividing the soil sample in the outer cavity of the double-cavity closed sampler into n samples A, selecting a proper amount of soil from the soil in the inner cavity of the double-cavity closed sampler, uniformly dividing the soil into n samples B, and enabling the weight of the sample A to be the same as that of the sample B;
s3, selecting m samples A and m samples B (m is less than n), uniformly mixing the samples A and B, and dividing the mixture into 2m samples C;
s4, selecting three parts of the sample A, the sample B and the sample C, respectively using the three parts of the same sample as a test sample, a re-test sample and a reserved sample, respectively detecting the two parts of the sample A, the two parts of the sample B and the two parts of the sample C which are used as the test sample and the re-test sample, and obtaining a final detection result through data analysis.
Referring to fig. 3 and 4, the dual-cavity closed sampler includes a pedal 1, a vertical rod 2 is disposed on the upper side of the pedal 1, a through hole is disposed on the pedal 1, the vertical rod 2 is rotatably connected inside the through hole, a rotary cutter and an L-shaped fixed rod 4 are disposed on the lower side of the pedal 1, the rotary cutter is disposed on the right-angled inner side of the L-shaped fixed rod 4, the upper end of the L-shaped fixed rod 4 is fixedly connected with the lower end of the vertical rod 2, the rotary cutter is in a four-sided frame shape and includes an L-shaped hollow cutting rod 33, a main connecting rod 31 is fixedly connected to one end of the L-shaped hollow cutting rod 33 away from the L-shaped fixed rod 4, the upper end of the main connecting rod 31 is fixedly connected with the lower end of the vertical rod 2, an auxiliary connecting rod 32 is fixedly connected between the main connecting rod 31 and the L-shaped hollow cutting rod 33, the upper surface of the auxiliary connecting rod 32 is in contact with the lower surface of the pedal 1, referring to fig, the waterproof plastic envelope 52 is positioned on the inner side of the permeable gauze 51, the side end of the L-shaped hollow cutting rod 33 is respectively provided with a main L-shaped hole 3301 and an auxiliary L-shaped hole 3302, one side end of the permeable gauze 51 and one side end of the waterproof plastic envelope 52 are respectively fixedly connected to a pair of inner walls of the auxiliary L-shaped hole 3302, one end of the L-shaped fixed rod 4 close to the L-shaped hollow cutting rod 33 is provided with an inner groove 401, the other side ends of the permeable gauze 51 and the waterproof plastic envelope 52 are respectively fixedly connected to the inner wall of the inner groove 401, the inner groove 401 can be used for placing the permeable gauze 51 and the waterproof plastic envelope 52, the upper end and the lower end of the permeable gauze 51 and the upper end and the lower end of the waterproof plastic envelope 52 are both fixedly connected, an outer cavity is formed between the permeable gauze 51 and the waterproof plastic envelope 52, one side of the L-shaped hollow cutting rod 33 far away from the permeable gauze 51 is provided with a pair of, and simultaneously facilitates the soil to enter the inside of the permeable gauze 51 and the waterproof plastic envelope 52.
The rotary cutter can be driven to rotate by the vertical rod 2, when the rotary cutter rotates, the L-shaped hollow cutting rod 33 and the L-shaped fixed rod 4 are far away from each other, so that the permeable gauze 51 and the waterproof plastic envelope 52 are gradually unfolded, when the L-shaped hollow cutting rod 33 rotates for 360 degrees, the permeable gauze 51 forms a cylinder shape, the inner part of the permeable gauze is used as an inner cavity for storing soil, the soil is not easy to fall off when being taken out, meanwhile, the soil is not required to be compacted when being stored, the soil moisture is not easy to be influenced, an outer cavity formed between the permeable gauze 51 and the waterproof plastic envelope 52 is used for storing the soil cut by the L-shaped hollow cutting rod 33 on a rotating path, the soil on the cutting path is extruded by the L-shaped hollow cutting rod 33, partial moisture of the soil is extruded, the soil is classified and stored with the soil on the inner side of the waterproof plastic envelope 52, and, and the water molecules in the two parts of soil can not move mutually through the waterproof plastic coating 52, and the water-permeable gauze 51 can facilitate the movement of the water molecules, so that the extruded water can return to the soil in the outer cavity through the water-permeable gauze 51, and the authenticity of the detection result is further ensured.
Referring to fig. 3 and 7, a positioning plate 6 is fixedly connected to an outer end of the vertical rod 2, a lower surface of the positioning plate 6 contacts with an upper surface of the pedal 1, a pair of positioning holes 601 is formed in the positioning plate 6, a pair of locking grooves 101 is formed in an upper end of the pedal 1, bolts 7 are connected between the positioning holes 601 and the locking grooves 101 in a threaded manner, the positioning plate 6 and the pedal 1 are fixed through the bolts 7, and therefore the vertical rod 2 and the rotary cutter are fixed before and after rotation, the vertical rod 2 and the rotary cutter are limited in the vertical direction through the positioning plate 6 and the auxiliary connecting rod 32 and are enabled to rotate stably, positioning lines 9 are carved on the upper surface of the pedal 1 and the upper surface of the positioning plate 6, and the positioning lines 9 are used for conveniently and quickly and accurately positioning the rotation of the positioning plate 6.
Please refer to fig. 3 and 4, the lower end of the pedal 1 is fixedly connected with a reinforcing disc 8, the reinforcing disc 8 is located outside the rotary cutter and the L-shaped fixed rod 4, the lower end of the reinforcing disc 8 is saw-toothed, the reinforcing disc 8 has the functions of controlling the sampling depth and positioning the pedal 1, when the L-shaped fixed rod 4 and the rotary cutter are inserted into the soil, when the lower end of the reinforcing disc 8 is inserted into the soil surface layer, the insertion of the L-shaped fixed rod 4 can be stopped, meanwhile, when the vertical rod 2 is rotated, the position of the pedal 1 can be stabilized through the reinforcing disc 8, and the rotation of the vertical rod 2 is further facilitated.
Before the use, the L-shaped fixed rod 4 and the rotary cutter are positioned at the same side, when in sampling, the L-shaped fixed rod 4 and the rotary cutter are vertically inserted into soil, after the L-shaped fixed rod 4 and the rotary cutter are inserted into the soil to a proper depth, the vertical rod 2 is rotated, the vertical rod 2 drives the rotary cutter to rotate, the water-permeable gauze 51 and the waterproof plastic envelope 52 are gradually unfolded along the rotating path of the L-shaped hollow cutting rod 33, the vertical rod 2 is rotated by 360 degrees, the rotating path of the L-shaped hollow cutting rod 33 is circular, a cylindrical soil area is cut out through the L-shaped hollow cutting bar 33, and the cylindrical soil is wrapped inside the inner cavity formed by the waterproof plastic envelope 52, and at the same time, in the process of cutting soil by rotating the L-shaped hollow cutting rod 33, the soil on the cutting path sequentially passes through the main L-shaped hole 3301 and the auxiliary L-shaped hole 3302 and enters an outer cavity formed by the permeable gauze 51 and the waterproof plastic envelope 52, so that two parts of soil detection samples are obtained.
According to the invention, the soil is sampled by adopting the double-cavity closed sampler, so that the soil sample which is not extruded and compacted and the soil sample which is dehydrated after being extruded are obtained, the two parts of soil samples and the average sample obtained after mixing the two parts of soil samples are classified and detected, so that the residual pesticide content before and after the soil is extruded can be analyzed, the influence of the extrusion on the soil detection result is detected, and the accurate detection result is obtained.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a guarantor's water type pesticide residue detection method suitable for spongy moist soil, includes the closed sampler of two-chamber, the closed sampler of two-chamber includes inner chamber and exocoel, its characterized in that: the detection method comprises the following steps:
s1, selecting a complete area in a target detection area, and taking out a soil sample from the area by a detector by using a double-cavity closed sampler to obtain soil samples of an outer cavity and an inner cavity;
s2, uniformly dividing the soil sample in the outer cavity of the double-cavity closed sampler into n samples A, selecting a proper amount of soil from the soil in the inner cavity of the double-cavity closed sampler, uniformly dividing the soil into n samples B, and enabling the weight of the sample A to be the same as that of the sample B;
s3, selecting m samples A and m samples B (m is less than n), uniformly mixing the samples A and B, and dividing the mixture into 2m samples C;
s4, selecting three parts of the sample A, the sample B and the sample C, respectively using the three parts of the same sample as a test sample, a re-test sample and a reserved sample, respectively detecting the two parts of the sample A, the two parts of the sample B and the two parts of the sample C which are used as the test sample and the re-test sample, and obtaining a final detection result through data analysis.
2. The method for detecting water-retaining pesticide residue suitable for spongy wet soil according to claim 1, wherein the method comprises the following steps: the closed sampler of two-chamber includes pedal (1), the upside of pedal (1) is equipped with montant (2), the through-hole has been seted up on pedal (1), montant (2) rotate to be connected in the inside of through-hole, the downside of pedal (1) is equipped with rotary cutter and L type fixed pole (4), rotary cutter is located the right angle inboard of L type fixed pole (4), the upper end of L type fixed pole (4) and the lower extreme fixed connection of montant (2).
3. The method for detecting water-retaining pesticide residues suitable for spongy wet soil according to claim 2, characterized in that: the rotary cutter is the four-frame shape, the rotary cutter includes that the L type is hollow cuts pole (33), the hollow one end fixedly connected with main connecting rod (31) of pole (4) is decided in the L type is kept away from in the hollow pole (33) of cutting of L type, the upper end of main connecting rod (31) and the lower extreme fixed connection of montant (2), the hollow vice connecting rod (32) of fixedly connected with between pole (33) of cutting of main connecting rod (31) and L type, the upper surface of vice connecting rod (32) contacts with the lower surface of trampling board (1).
4. The method for detecting water-retaining pesticide residue suitable for spongy wet soil according to claim 3, wherein the method comprises the following steps: a permeable gauze (51) and a waterproof plastic envelope (52) are fixedly connected between the L-shaped hollow cutting rod (33) and the L-shaped fixed rod (4), the waterproof plastic envelope (52) is positioned on the inner side of the permeable gauze (51), the side end of the L-shaped hollow cutting rod (33) is respectively provided with a main L-shaped hole (3301) and an auxiliary L-shaped hole (3302), one side ends of the permeable gauze (51) and the waterproof plastic envelope (52) are respectively and fixedly connected with a pair of inner walls of the auxiliary L-shaped hole (3302), an inner groove (401) is arranged at one end of the L-shaped fixed rod (4) close to the L-shaped hollow cutting rod (33), the other side ends of the permeable gauze (51) and the waterproof plastic envelope (52) are respectively fixedly connected on the inner wall of the inner groove (401), the upper end and the lower end of the permeable gauze (51) and the waterproof plastic envelope (52) are fixedly connected, an outer cavity is formed between the water-permeable gauze (51) and the waterproof plastic envelope (52).
5. The method for detecting water-retaining pesticide residue suitable for spongy wet soil according to claim 4, wherein the method comprises the following steps: one side of the L-shaped hollow cutting rod (33) far away from the permeable gauze (51) is provided with a pair of slices (34), and the slices (34) are respectively and fixedly connected to a pair of inner walls of the main L-shaped hole (3301).
6. The method for detecting water-retaining pesticide residues suitable for spongy wet soil according to claim 2, characterized in that: the outer end fixedly connected with locating plate (6) of montant (2), the lower surface of locating plate (6) contacts with the upper surface of pedal (1), a pair of locating hole (601) has been seted up on locating plate (6), a pair of locked groove (101) has been seted up to the upper end of pedal (1), threaded connection has bolt (7) between locating hole (601) and locked groove (101).
7. The method for detecting water-retaining pesticide residue suitable for spongy wet soil according to claim 6, wherein the method comprises the following steps: positioning lines (9) are carved on the upper surface of the pedal (1) and the upper surface of the positioning plate (6).
8. The method for detecting water-retaining pesticide residues suitable for spongy wet soil according to claim 2, characterized in that: the lower end of the pedal (1) is fixedly connected with a reinforcing disc (8), the reinforcing disc (8) is positioned on the outer sides of the rotary cutter and the L-shaped fixed rod (4), and the lower end of the reinforcing disc (8) is in a sawtooth shape.
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CN202010562950.9A CN111707493A (en) | 2020-06-19 | 2020-06-19 | Water-retention type pesticide residue detection method suitable for spongy wet soil |
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CN202010562950.9A CN111707493A (en) | 2020-06-19 | 2020-06-19 | Water-retention type pesticide residue detection method suitable for spongy wet soil |
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CN114740177B (en) * | 2022-03-24 | 2024-02-23 | 胡利航 | Slope instability risk factor simulation test device |
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